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really a perfect check, but works fine.\n// From http://stackoverflow.com/questions/384286\nconst HAS_DOM_2 = typeof HTMLElement === \"object\";\n\nfunction isDOMElement(obj) {\n  return HAS_DOM_2\n    ? obj instanceof HTMLElement\n    : obj && typeof obj === \"object\" && obj !== null && obj.nodeType === 1 && typeof obj.nodeName === \"string\";\n}\n\nfunction addClasses(el, classNames) {\n  classNames.forEach(function(className) {\n    el.classList.add(className);\n  });\n}\n\nfunction removeClasses(el, classNames) {\n  classNames.forEach(function(className) {\n    el.classList.remove(className);\n  });\n}\n\n// CONCATENATED MODULE: ./src/js/injectBaseStylesheet.js\n/* UNMINIFIED RULES\n\nconst RULES = `\n@keyframes noop {\n  0% { zoom: 1; }\n}\n\n@-webkit-keyframes noop {\n  0% { zoom: 1; }\n}\n\n.drift-zoom-pane.drift-open {\n  display: block;\n}\n\n.drift-zoom-pane.drift-opening, .drift-zoom-pane.drift-closing {\n  animation: noop 1ms;\n  -webkit-animation: noop 1ms;\n}\n\n.drift-zoom-pane {\n  position: absolute;\n  overflow: hidden;\n  width: 100%;\n  height: 100%;\n  top: 0;\n  left: 0;\n  pointer-events: none;\n}\n\n.drift-zoom-pane-loader {\n  display: none;\n}\n\n.drift-zoom-pane img {\n  position: absolute;\n  display: block;\n  max-width: none;\n  max-height: none;\n}\n\n.drift-bounding-box {\n  position: absolute;\n  pointer-events: none;\n}\n`;\n\n*/\n\nconst RULES =\n  \".drift-bounding-box,.drift-zoom-pane{position:absolute;pointer-events:none}@keyframes noop{0%{zoom:1}}@-webkit-keyframes noop{0%{zoom:1}}.drift-zoom-pane.drift-open{display:block}.drift-zoom-pane.drift-closing,.drift-zoom-pane.drift-opening{animation:noop 1ms;-webkit-animation:noop 1ms}.drift-zoom-pane{overflow:hidden;width:100%;height:100%;top:0;left:0}.drift-zoom-pane-loader{display:none}.drift-zoom-pane img{position:absolute;display:block;max-width:none;max-height:none}\";\n\nfunction injectBaseStylesheet() {\n  if (document.querySelector(\".drift-base-styles\")) {\n    return;\n  }\n\n  const styleEl = document.createElement(\"style\");\n  styleEl.type = \"text/css\";\n  styleEl.classList.add(\"drift-base-styles\");\n\n  styleEl.appendChild(document.createTextNode(RULES));\n\n  const head = document.head;\n  head.insertBefore(styleEl, head.firstChild);\n}\n\n// CONCATENATED MODULE: ./src/js/util/throwIfMissing.js\nfunction throwIfMissing() {\n  throw new Error(\"Missing parameter\");\n}\n\n// CONCATENATED MODULE: ./src/js/BoundingBox.js\n\n\n\nclass BoundingBox_BoundingBox {\n  constructor(options) {\n    this.isShowing = false;\n\n    const { namespace = null, zoomFactor = throwIfMissing(), containerEl = throwIfMissing() } = options;\n\n    this.settings = { namespace, zoomFactor, containerEl };\n\n    this.openClasses = this._buildClasses(\"open\");\n\n    this._buildElement();\n  }\n\n  _buildClasses(suffix) {\n    const classes = [`drift-${suffix}`];\n\n    const ns = this.settings.namespace;\n    if (ns) {\n      classes.push(`${ns}-${suffix}`);\n    }\n\n    return classes;\n  }\n\n  _buildElement() {\n    this.el = document.createElement(\"div\");\n    addClasses(this.el, this._buildClasses(\"bounding-box\"));\n  }\n\n  show(zoomPaneWidth, zoomPaneHeight) {\n    this.isShowing = true;\n\n    this.settings.containerEl.appendChild(this.el);\n\n    const style = this.el.style;\n    style.width = `${Math.round(zoomPaneWidth / this.settings.zoomFactor)}px`;\n    style.height = `${Math.round(zoomPaneHeight / this.settings.zoomFactor)}px`;\n\n    addClasses(this.el, this.openClasses);\n  }\n\n  hide() {\n    if (this.isShowing) {\n      this.settings.containerEl.removeChild(this.el);\n    }\n\n    this.isShowing = false;\n\n    removeClasses(this.el, this.openClasses);\n  }\n\n  setPosition(percentageOffsetX, percentageOffsetY, triggerRect) {\n    const pageXOffset = window.pageXOffset;\n    const pageYOffset = window.pageYOffset;\n\n    let inlineLeft = triggerRect.left + percentageOffsetX * triggerRect.width - this.el.clientWidth / 2 + pageXOffset;\n    let inlineTop = triggerRect.top + percentageOffsetY * triggerRect.height - this.el.clientHeight / 2 + pageYOffset;\n\n    if (inlineLeft < triggerRect.left + pageXOffset) {\n      inlineLeft = triggerRect.left + pageXOffset;\n    } else if (inlineLeft + this.el.clientWidth > triggerRect.left + triggerRect.width + pageXOffset) {\n      inlineLeft = triggerRect.left + triggerRect.width - this.el.clientWidth + pageXOffset;\n    }\n\n    if (inlineTop < triggerRect.top + pageYOffset) {\n      inlineTop = triggerRect.top + pageYOffset;\n    } else if (inlineTop + this.el.clientHeight > triggerRect.top + triggerRect.height + pageYOffset) {\n      inlineTop = triggerRect.top + triggerRect.height - this.el.clientHeight + pageYOffset;\n    }\n\n    this.el.style.left = `${inlineLeft}px`;\n    this.el.style.top = `${inlineTop}px`;\n  }\n}\n\n// CONCATENATED MODULE: ./src/js/Trigger.js\n\n\n\nclass Trigger_Trigger {\n  constructor(options = {}) {\n    this._show = this._show.bind(this);\n    this._hide = this._hide.bind(this);\n    this._handleEntry = this._handleEntry.bind(this);\n    this._handleMovement = this._handleMovement.bind(this);\n\n    const {\n      el = throwIfMissing(),\n      zoomPane = throwIfMissing(),\n      sourceAttribute = throwIfMissing(),\n      handleTouch = throwIfMissing(),\n      onShow = null,\n      onHide = null,\n      hoverDelay = 0,\n      touchDelay = 0,\n      hoverBoundingBox = throwIfMissing(),\n      touchBoundingBox = throwIfMissing(),\n      namespace = null,\n      zoomFactor = throwIfMissing(),\n      boundingBoxContainer = throwIfMissing()\n    } = options;\n\n    this.settings = {\n      el,\n      zoomPane,\n      sourceAttribute,\n      handleTouch,\n      onShow,\n      onHide,\n      hoverDelay,\n      touchDelay,\n      hoverBoundingBox,\n      touchBoundingBox,\n      namespace,\n      zoomFactor,\n      boundingBoxContainer\n    };\n\n    if (this.settings.hoverBoundingBox || this.settings.touchBoundingBox) {\n      this.boundingBox = new BoundingBox_BoundingBox({\n        namespace: this.settings.namespace,\n        zoomFactor: this.settings.zoomFactor,\n        containerEl: this.settings.boundingBoxContainer\n      });\n    }\n\n    this.enabled = true;\n\n    this._bindEvents();\n  }\n\n  get isShowing() {\n    return this.settings.zoomPane.isShowing;\n  }\n\n  _preventDefault(event) {\n    event.preventDefault();\n  }\n\n  _preventDefaultAllowTouchScroll(event) {\n    if (!this.settings.touchDelay || !this._isTouchEvent(event) || this.isShowing) {\n      event.preventDefault();\n    }\n  }\n\n  _isTouchEvent(event) {\n    return !!event.touches;\n  }\n\n  _bindEvents() {\n    this.settings.el.addEventListener(\"mouseenter\", this._handleEntry, false);\n    this.settings.el.addEventListener(\"mouseleave\", this._hide, false);\n    this.settings.el.addEventListener(\"mousemove\", this._handleMovement, false);\n\n    if (this.settings.handleTouch) {\n      this.settings.el.addEventListener(\"touchstart\", this._handleEntry, false);\n      this.settings.el.addEventListener(\"touchend\", this._hide, false);\n      this.settings.el.addEventListener(\"touchmove\", this._handleMovement, false);\n    } else {\n      this.settings.el.addEventListener(\"touchstart\", this._preventDefault, false);\n      this.settings.el.addEventListener(\"touchend\", this._preventDefault, false);\n      this.settings.el.addEventListener(\"touchmove\", this._preventDefault, false);\n    }\n  }\n\n  _unbindEvents() {\n    this.settings.el.removeEventListener(\"mouseenter\", this._handleEntry, false);\n    this.settings.el.removeEventListener(\"mouseleave\", this._hide, false);\n    this.settings.el.removeEventListener(\"mousemove\", this._handleMovement, false);\n\n    if (this.settings.handleTouch) {\n      this.settings.el.removeEventListener(\"touchstart\", this._handleEntry, false);\n      this.settings.el.removeEventListener(\"touchend\", this._hide, false);\n      this.settings.el.removeEventListener(\"touchmove\", this._handleMovement, false);\n    } else {\n      this.settings.el.removeEventListener(\"touchstart\", this._preventDefault, false);\n      this.settings.el.removeEventListener(\"touchend\", this._preventDefault, false);\n      this.settings.el.removeEventListener(\"touchmove\", this._preventDefault, false);\n    }\n  }\n\n  _handleEntry(e) {\n    this._preventDefaultAllowTouchScroll(e);\n    this._lastMovement = e;\n\n    if (e.type == \"mouseenter\" && this.settings.hoverDelay) {\n      this.entryTimeout = setTimeout(this._show, this.settings.hoverDelay);\n    } else if (this.settings.touchDelay) {\n      this.entryTimeout = setTimeout(this._show, this.settings.touchDelay);\n    } else {\n      this._show();\n    }\n  }\n\n  _show() {\n    if (!this.enabled) {\n      return;\n    }\n\n    const onShow = this.settings.onShow;\n    if (onShow && typeof onShow === \"function\") {\n      onShow();\n    }\n\n    this.settings.zoomPane.show(\n      this.settings.el.getAttribute(this.settings.sourceAttribute),\n      this.settings.el.clientWidth,\n      this.settings.el.clientHeight\n    );\n\n    if (this._lastMovement) {\n      const touchActivated = this._lastMovement.touches;\n      if ((touchActivated && this.settings.touchBoundingBox) || (!touchActivated && this.settings.hoverBoundingBox)) {\n        this.boundingBox.show(this.settings.zoomPane.el.clientWidth, this.settings.zoomPane.el.clientHeight);\n      }\n    }\n\n    this._handleMovement();\n  }\n\n  _hide(e) {\n    if (e) {\n      this._preventDefaultAllowTouchScroll(e);\n    }\n\n    this._lastMovement = null;\n\n    if (this.entryTimeout) {\n      clearTimeout(this.entryTimeout);\n    }\n\n    if (this.boundingBox) {\n      this.boundingBox.hide();\n    }\n\n    const onHide = this.settings.onHide;\n    if (onHide && typeof onHide === \"function\") {\n      onHide();\n    }\n\n    this.settings.zoomPane.hide();\n  }\n\n  _handleMovement(e) {\n    if (e) {\n      this._preventDefaultAllowTouchScroll(e);\n      this._lastMovement = e;\n    } else if (this._lastMovement) {\n      e = this._lastMovement;\n    } else {\n      return;\n    }\n\n    let movementX;\n    let movementY;\n\n    if (e.touches) {\n      const firstTouch = e.touches[0];\n      movementX = firstTouch.clientX;\n      movementY = firstTouch.clientY;\n    } else {\n      movementX = e.clientX;\n      movementY = e.clientY;\n    }\n\n    const el = this.settings.el;\n    const rect = el.getBoundingClientRect();\n    const offsetX = movementX - rect.left;\n    const offsetY = movementY - rect.top;\n\n    const percentageOffsetX = offsetX / this.settings.el.clientWidth;\n    const percentageOffsetY = offsetY / this.settings.el.clientHeight;\n\n    if (this.boundingBox) {\n      this.boundingBox.setPosition(percentageOffsetX, percentageOffsetY, rect);\n    }\n\n    this.settings.zoomPane.setPosition(percentageOffsetX, percentageOffsetY, rect);\n  }\n}\n\n// CONCATENATED MODULE: ./src/js/ZoomPane.js\n\n\n\n// All officially-supported browsers have this, but it's easy to\n// account for, just in case.\nconst divStyle = document.createElement(\"div\").style;\n\nconst HAS_ANIMATION =\n  typeof document === \"undefined\" ? false : \"animation\" in divStyle || \"webkitAnimation\" in divStyle;\n\nclass ZoomPane_ZoomPane {\n  constructor(options = {}) {\n    this._completeShow = this._completeShow.bind(this);\n    this._completeHide = this._completeHide.bind(this);\n    this._handleLoad = this._handleLoad.bind(this);\n\n    this.isShowing = false;\n\n    const {\n      container = null,\n      zoomFactor = throwIfMissing(),\n      inline = throwIfMissing(),\n      namespace = null,\n      showWhitespaceAtEdges = throwIfMissing(),\n      containInline = throwIfMissing(),\n      inlineOffsetX = 0,\n      inlineOffsetY = 0,\n      inlineContainer = document.body\n    } = options;\n\n    this.settings = {\n      container,\n      zoomFactor,\n      inline,\n      namespace,\n      showWhitespaceAtEdges,\n      containInline,\n      inlineOffsetX,\n      inlineOffsetY,\n      inlineContainer\n    };\n\n    this.openClasses = this._buildClasses(\"open\");\n    this.openingClasses = this._buildClasses(\"opening\");\n    this.closingClasses = this._buildClasses(\"closing\");\n    this.inlineClasses = this._buildClasses(\"inline\");\n    this.loadingClasses = this._buildClasses(\"loading\");\n\n    this._buildElement();\n  }\n\n  _buildClasses(suffix) {\n    const classes = [`drift-${suffix}`];\n\n    const ns = this.settings.namespace;\n    if (ns) {\n      classes.push(`${ns}-${suffix}`);\n    }\n\n    return classes;\n  }\n\n  _buildElement() {\n    this.el = document.createElement(\"div\");\n    addClasses(this.el, this._buildClasses(\"zoom-pane\"));\n\n    const loaderEl = document.createElement(\"div\");\n    addClasses(loaderEl, this._buildClasses(\"zoom-pane-loader\"));\n    this.el.appendChild(loaderEl);\n\n    this.imgEl = document.createElement(\"img\");\n    this.el.appendChild(this.imgEl);\n  }\n\n  _setImageURL(imageURL) {\n    this.imgEl.setAttribute(\"src\", imageURL);\n  }\n\n  _setImageSize(triggerWidth, triggerHeight) {\n    this.imgEl.style.width = `${triggerWidth * this.settings.zoomFactor}px`;\n    this.imgEl.style.height = `${triggerHeight * this.settings.zoomFactor}px`;\n  }\n\n  // `percentageOffsetX` and `percentageOffsetY` must be percentages\n  // expressed as floats between `0' and `1`.\n  setPosition(percentageOffsetX, percentageOffsetY, triggerRect) {\n    const imgElWidth = this.imgEl.offsetWidth;\n    const imgElHeight = this.imgEl.offsetHeight;\n    const elWidth = this.el.offsetWidth;\n    const elHeight = this.el.offsetHeight;\n\n    const centreOfContainerX = elWidth / 2;\n    const centreOfContainerY = elHeight / 2;\n\n    const targetImgXToBeCentre = imgElWidth * percentageOffsetX;\n    const targetImgYToBeCentre = imgElHeight * percentageOffsetY;\n\n    let left = centreOfContainerX - targetImgXToBeCentre;\n    let top = centreOfContainerY - targetImgYToBeCentre;\n\n    const differenceBetweenContainerWidthAndImgWidth = elWidth - imgElWidth;\n    const differenceBetweenContainerHeightAndImgHeight = elHeight - imgElHeight;\n    const isContainerLargerThanImgX = differenceBetweenContainerWidthAndImgWidth > 0;\n    const isContainerLargerThanImgY = differenceBetweenContainerHeightAndImgHeight > 0;\n\n    const minLeft = isContainerLargerThanImgX ? differenceBetweenContainerWidthAndImgWidth / 2 : 0;\n    const minTop = isContainerLargerThanImgY ? differenceBetweenContainerHeightAndImgHeight / 2 : 0;\n\n    const maxLeft = isContainerLargerThanImgX\n      ? differenceBetweenContainerWidthAndImgWidth / 2\n      : differenceBetweenContainerWidthAndImgWidth;\n    const maxTop = isContainerLargerThanImgY\n      ? differenceBetweenContainerHeightAndImgHeight / 2\n      : differenceBetweenContainerHeightAndImgHeight;\n\n    if (this.el.parentElement === this.settings.inlineContainer) {\n      // This may be needed in the future to deal with browser event\n      // inconsistencies, but it's difficult to tell for sure.\n      // let scrollX = isTouch ? 0 : window.scrollX;\n      // let scrollY = isTouch ? 0 : window.scrollY;\n      const scrollX = window.pageXOffset;\n      const scrollY = window.pageYOffset;\n\n      let inlineLeft =\n        triggerRect.left + percentageOffsetX * triggerRect.width - elWidth / 2 + this.settings.inlineOffsetX + scrollX;\n      let inlineTop =\n        triggerRect.top + percentageOffsetY * triggerRect.height - elHeight / 2 + this.settings.inlineOffsetY + scrollY;\n\n      if (this.settings.containInline) {\n        if (inlineLeft < triggerRect.left + scrollX) {\n          inlineLeft = triggerRect.left + scrollX;\n        } else if (inlineLeft + elWidth > triggerRect.left + triggerRect.width + scrollX) {\n          inlineLeft = triggerRect.left + triggerRect.width - elWidth + scrollX;\n        }\n\n        if (inlineTop < triggerRect.top + scrollY) {\n          inlineTop = triggerRect.top + scrollY;\n        } else if (inlineTop + elHeight > triggerRect.top + triggerRect.height + scrollY) {\n          inlineTop = triggerRect.top + triggerRect.height - elHeight + scrollY;\n        }\n      }\n\n      this.el.style.left = `${inlineLeft}px`;\n      this.el.style.top = `${inlineTop}px`;\n    }\n\n    if (!this.settings.showWhitespaceAtEdges) {\n      if (left > minLeft) {\n        left = minLeft;\n      } else if (left < maxLeft) {\n        left = maxLeft;\n      }\n\n      if (top > minTop) {\n        top = minTop;\n      } else if (top < maxTop) {\n        top = maxTop;\n      }\n    }\n\n    this.imgEl.style.transform = `translate(${left}px, ${top}px)`;\n    this.imgEl.style.webkitTransform = `translate(${left}px, ${top}px)`;\n  }\n\n  get _isInline() {\n    const inline = this.settings.inline;\n\n    return inline === true || (typeof inline === \"number\" && window.innerWidth <= inline);\n  }\n\n  _removeListenersAndResetClasses() {\n    this.el.removeEventListener(\"animationend\", this._completeShow, false);\n    this.el.removeEventListener(\"animationend\", this._completeHide, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n    removeClasses(this.el, this.openClasses);\n    removeClasses(this.el, this.closingClasses);\n  }\n\n  show(imageURL, triggerWidth, triggerHeight) {\n    this._removeListenersAndResetClasses();\n    this.isShowing = true;\n\n    addClasses(this.el, this.openClasses);\n\n    if (this.imgEl.getAttribute(\"src\") != imageURL) {\n      addClasses(this.el, this.loadingClasses);\n      this.imgEl.addEventListener(\"load\", this._handleLoad, false);\n      this._setImageURL(imageURL);\n    }\n\n    this._setImageSize(triggerWidth, triggerHeight);\n\n    if (this._isInline) {\n      this._showInline();\n    } else {\n      this._showInContainer();\n    }\n\n    if (HAS_ANIMATION) {\n      this.el.addEventListener(\"animationend\", this._completeShow, false);\n      this.el.addEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n      addClasses(this.el, this.openingClasses);\n    }\n  }\n\n  _showInline() {\n    this.settings.inlineContainer.appendChild(this.el);\n    addClasses(this.el, this.inlineClasses);\n  }\n\n  _showInContainer() {\n    this.settings.container.appendChild(this.el);\n  }\n\n  hide() {\n    this._removeListenersAndResetClasses();\n    this.isShowing = false;\n\n    if (HAS_ANIMATION) {\n      this.el.addEventListener(\"animationend\", this._completeHide, false);\n      this.el.addEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n      addClasses(this.el, this.closingClasses);\n    } else {\n      removeClasses(this.el, this.openClasses);\n      removeClasses(this.el, this.inlineClasses);\n    }\n  }\n\n  _completeShow() {\n    this.el.removeEventListener(\"animationend\", this._completeShow, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n\n    removeClasses(this.el, this.openingClasses);\n  }\n\n  _completeHide() {\n    this.el.removeEventListener(\"animationend\", this._completeHide, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n\n    removeClasses(this.el, this.openClasses);\n    removeClasses(this.el, this.closingClasses);\n    removeClasses(this.el, this.inlineClasses);\n\n    this.el.setAttribute(\"style\", \"\");\n\n    // The window could have been resized above or below `inline`\n    // limits since the ZoomPane was shown. Because of this, we\n    // can't rely on `this._isInline` here.\n    if (this.el.parentElement === this.settings.container) {\n      this.settings.container.removeChild(this.el);\n    } else if (this.el.parentElement === this.settings.inlineContainer) {\n      this.settings.inlineContainer.removeChild(this.el);\n    }\n  }\n\n  _handleLoad() {\n    this.imgEl.removeEventListener(\"load\", this._handleLoad, false);\n    removeClasses(this.el, this.loadingClasses);\n  }\n}\n\n// CONCATENATED MODULE: ./src/js/Drift.js\n\n\n\n\n\n\nclass Drift_Drift {\n  constructor(triggerEl, options = {}) {\n    this.VERSION = \"1.4.0\";\n    this.triggerEl = triggerEl;\n\n    this.destroy = this.destroy.bind(this);\n\n    if (!isDOMElement(this.triggerEl)) {\n      throw new TypeError(\"`new Drift` requires a DOM element as its first argument.\");\n    }\n\n    // Prefix for generated element class names (e.g. `my-ns` will\n    // result in classes such as `my-ns-pane`. Default `drift-`\n    // prefixed classes will always be added as well.\n    const namespace = options[\"namespace\"] || null;\n    // Whether the ZoomPane should show whitespace when near the edges.\n    const showWhitespaceAtEdges = options[\"showWhitespaceAtEdges\"] || false;\n    // Whether the inline ZoomPane should stay inside\n    // the bounds of its image.\n    const containInline = options[\"containInline\"] || false;\n    // How much to offset the ZoomPane from the\n    // interaction point when inline.\n    const inlineOffsetX = options[\"inlineOffsetX\"] || 0;\n    const inlineOffsetY = options[\"inlineOffsetY\"] || 0;\n    // A DOM element to append the inline ZoomPane to\n    const inlineContainer = options[\"inlineContainer\"] || document.body;\n    // Which trigger attribute to pull the ZoomPane image source from.\n    const sourceAttribute = options[\"sourceAttribute\"] || \"data-zoom\";\n    // How much to magnify the trigger by in the ZoomPane.\n    // (e.g., `zoomFactor: 3` will result in a 900 px wide ZoomPane imag\n    // if the trigger is displayed at 300 px wide)\n    const zoomFactor = options[\"zoomFactor\"] || 3;\n    // A DOM element to append the non-inline ZoomPane to.\n    // Required if `inlinePane !== true`.\n    const paneContainer = options[\"paneContainer\"] === undefined ? document.body : options[\"paneContainer\"];\n    // When to switch to an inline ZoomPane. This can be a boolean or\n    // an integer. If `true`, the ZoomPane will always be inline,\n    // if `false`, it will switch to inline when `windowWidth <= inlinePane`\n    const inlinePane = options[\"inlinePane\"] || 375;\n    // If `true`, touch events will trigger the zoom, like mouse events.\n    const handleTouch = \"handleTouch\" in options ? !!options[\"handleTouch\"] : true;\n    // If present (and a function), this will be called\n    // whenever the ZoomPane is shown.\n    const onShow = options[\"onShow\"] || null;\n    // If present (and a function), this will be called\n    // whenever the ZoomPane is hidden.\n    const onHide = options[\"onHide\"] || null;\n    // Add base styles to the page. See the \"Theming\"\n    // section of README.md for more information.\n    const injectBaseStyles = \"injectBaseStyles\" in options ? !!options[\"injectBaseStyles\"] : true;\n    // An optional number that determines how long to wait before\n    // showing the ZoomPane because of a `mouseenter` event.\n    const hoverDelay = options[\"hoverDelay\"] || 0;\n    // An optional number that determines how long to wait before\n    // showing the ZoomPane because of a `touchstart` event.\n    // It's unlikely that you would want to use this option, since\n    // \"tap and hold\" is much more intentional than a hover event.\n    const touchDelay = options[\"touchDelay\"] || 0;\n    // If true, a bounding box will show the area currently being previewed\n    // during mouse hover\n    const hoverBoundingBox = options[\"hoverBoundingBox\"] || false;\n    // If true, a bounding box will show the area currently being previewed\n    // during touch events\n    const touchBoundingBox = options[\"touchBoundingBox\"] || false;\n    // A DOM element to append the bounding box to.\n    const boundingBoxContainer = options[\"boundingBoxContainer\"] || document.body;\n\n    if (inlinePane !== true && !isDOMElement(paneContainer)) {\n      throw new TypeError(\"`paneContainer` must be a DOM element when `inlinePane !== true`\");\n    }\n    if (!isDOMElement(inlineContainer)) {\n      throw new TypeError(\"`inlineContainer` must be a DOM element\");\n    }\n\n    this.settings = {\n      namespace,\n      showWhitespaceAtEdges,\n      containInline,\n      inlineOffsetX,\n      inlineOffsetY,\n      inlineContainer,\n      sourceAttribute,\n      zoomFactor,\n      paneContainer,\n      inlinePane,\n      handleTouch,\n      onShow,\n      onHide,\n      injectBaseStyles,\n      hoverDelay,\n      touchDelay,\n      hoverBoundingBox,\n      touchBoundingBox,\n      boundingBoxContainer\n    };\n\n    if (this.settings.injectBaseStyles) {\n      injectBaseStylesheet();\n    }\n\n    this._buildZoomPane();\n    this._buildTrigger();\n  }\n\n  get isShowing() {\n    return this.zoomPane.isShowing;\n  }\n\n  get zoomFactor() {\n    return this.settings.zoomFactor;\n  }\n\n  set zoomFactor(zf) {\n    this.settings.zoomFactor = zf;\n    this.zoomPane.settings.zoomFactor = zf;\n    this.trigger.settings.zoomFactor = zf;\n    this.boundingBox.settings.zoomFactor = zf;\n  }\n\n  _buildZoomPane() {\n    this.zoomPane = new ZoomPane_ZoomPane({\n      container: this.settings.paneContainer,\n      zoomFactor: this.settings.zoomFactor,\n      showWhitespaceAtEdges: this.settings.showWhitespaceAtEdges,\n      containInline: this.settings.containInline,\n      inline: this.settings.inlinePane,\n      namespace: this.settings.namespace,\n      inlineOffsetX: this.settings.inlineOffsetX,\n      inlineOffsetY: this.settings.inlineOffsetY,\n      inlineContainer: this.settings.inlineContainer\n    });\n  }\n\n  _buildTrigger() {\n    this.trigger = new Trigger_Trigger({\n      el: this.triggerEl,\n      zoomPane: this.zoomPane,\n      handleTouch: this.settings.handleTouch,\n      onShow: this.settings.onShow,\n      onHide: this.settings.onHide,\n      sourceAttribute: this.settings.sourceAttribute,\n      hoverDelay: this.settings.hoverDelay,\n      touchDelay: this.settings.touchDelay,\n      hoverBoundingBox: this.settings.hoverBoundingBox,\n      touchBoundingBox: this.settings.touchBoundingBox,\n      namespace: this.settings.namespace,\n      zoomFactor: this.settings.zoomFactor,\n      boundingBoxContainer: this.settings.boundingBoxContainer\n    });\n  }\n\n  setZoomImageURL(imageURL) {\n    this.zoomPane._setImageURL(imageURL);\n  }\n\n  disable() {\n    this.trigger.enabled = false;\n  }\n\n  enable() {\n    this.trigger.enabled = true;\n  }\n\n  destroy() {\n    this.trigger._hide();\n    this.trigger._unbindEvents();\n  }\n}\n\n// Public API\n/* eslint-disable no-self-assign */\nObject.defineProperty(Drift_Drift.prototype, \"isShowing\", {\n  get: function() {\n    return this.isShowing;\n  }\n});\nObject.defineProperty(Drift_Drift.prototype, \"zoomFactor\", {\n  get: function() {\n    return this.zoomFactor;\n  },\n  set: function(value) {\n    this.zoomFactor = value;\n  }\n});\nDrift_Drift.prototype[\"setZoomImageURL\"] = Drift_Drift.prototype.setZoomImageURL;\nDrift_Drift.prototype[\"disable\"] = Drift_Drift.prototype.disable;\nDrift_Drift.prototype[\"enable\"] = Drift_Drift.prototype.enable;\nDrift_Drift.prototype[\"destroy\"] = Drift_Drift.prototype.destroy;\n/* eslint-enable no-self-assign */\n\n// CONCATENATED MODULE: ./src/js/Drift-browser.js\n// This file is used for the standalone browser build\n\n\n\nwindow[\"Drift\"] = Drift_Drift;\n\n\n/***/ })\n/******/ ]);"," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, { enumerable: true, get: getter });\n \t\t}\n \t};\n\n \t// define __esModule on exports\n \t__webpack_require__.r = function(exports) {\n \t\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n \t\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n \t\t}\n \t\tObject.defineProperty(exports, '__esModule', { value: true });\n \t};\n\n \t// create a fake namespace object\n \t// mode & 1: value is a module id, require it\n \t// mode & 2: merge all properties of value into the ns\n \t// mode & 4: return value when already ns object\n \t// mode & 8|1: behave like require\n \t__webpack_require__.t = function(value, mode) {\n \t\tif(mode & 1) value = __webpack_require__(value);\n \t\tif(mode & 8) return value;\n \t\tif((mode & 4) && typeof value === 'object' && value && value.__esModule) return value;\n \t\tvar ns = Object.create(null);\n \t\t__webpack_require__.r(ns);\n \t\tObject.defineProperty(ns, 'default', { enumerable: true, value: value });\n \t\tif(mode & 2 && typeof value != 'string') for(var key in value) __webpack_require__.d(ns, key, function(key) { return value[key]; }.bind(null, key));\n \t\treturn ns;\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 0);\n","import { isDOMElement } from \"./util/dom\";\nimport injectBaseStylesheet from \"./injectBaseStylesheet\";\n\nimport Trigger from \"./Trigger\";\nimport ZoomPane from \"./ZoomPane\";\n\nexport default class Drift {\n  constructor(triggerEl, options = {}) {\n    this.VERSION = \"1.4.0\";\n    this.triggerEl = triggerEl;\n\n    this.destroy = this.destroy.bind(this);\n\n    if (!isDOMElement(this.triggerEl)) {\n      throw new TypeError(\"`new Drift` requires a DOM element as its first argument.\");\n    }\n\n    // Prefix for generated element class names (e.g. `my-ns` will\n    // result in classes such as `my-ns-pane`. Default `drift-`\n    // prefixed classes will always be added as well.\n    const namespace = options[\"namespace\"] || null;\n    // Whether the ZoomPane should show whitespace when near the edges.\n    const showWhitespaceAtEdges = options[\"showWhitespaceAtEdges\"] || false;\n    // Whether the inline ZoomPane should stay inside\n    // the bounds of its image.\n    const containInline = options[\"containInline\"] || false;\n    // How much to offset the ZoomPane from the\n    // interaction point when inline.\n    const inlineOffsetX = options[\"inlineOffsetX\"] || 0;\n    const inlineOffsetY = options[\"inlineOffsetY\"] || 0;\n    // A DOM element to append the inline ZoomPane to\n    const inlineContainer = options[\"inlineContainer\"] || document.body;\n    // Which trigger attribute to pull the ZoomPane image source from.\n    const sourceAttribute = options[\"sourceAttribute\"] || \"data-zoom\";\n    // How much to magnify the trigger by in the ZoomPane.\n    // (e.g., `zoomFactor: 3` will result in a 900 px wide ZoomPane imag\n    // if the trigger is displayed at 300 px wide)\n    const zoomFactor = options[\"zoomFactor\"] || 3;\n    // A DOM element to append the non-inline ZoomPane to.\n    // Required if `inlinePane !== true`.\n    const paneContainer = options[\"paneContainer\"] === undefined ? document.body : options[\"paneContainer\"];\n    // When to switch to an inline ZoomPane. This can be a boolean or\n    // an integer. If `true`, the ZoomPane will always be inline,\n    // if `false`, it will switch to inline when `windowWidth <= inlinePane`\n    const inlinePane = options[\"inlinePane\"] || 375;\n    // If `true`, touch events will trigger the zoom, like mouse events.\n    const handleTouch = \"handleTouch\" in options ? !!options[\"handleTouch\"] : true;\n    // If present (and a function), this will be called\n    // whenever the ZoomPane is shown.\n    const onShow = options[\"onShow\"] || null;\n    // If present (and a function), this will be called\n    // whenever the ZoomPane is hidden.\n    const onHide = options[\"onHide\"] || null;\n    // Add base styles to the page. See the \"Theming\"\n    // section of README.md for more information.\n    const injectBaseStyles = \"injectBaseStyles\" in options ? !!options[\"injectBaseStyles\"] : true;\n    // An optional number that determines how long to wait before\n    // showing the ZoomPane because of a `mouseenter` event.\n    const hoverDelay = options[\"hoverDelay\"] || 0;\n    // An optional number that determines how long to wait before\n    // showing the ZoomPane because of a `touchstart` event.\n    // It's unlikely that you would want to use this option, since\n    // \"tap and hold\" is much more intentional than a hover event.\n    const touchDelay = options[\"touchDelay\"] || 0;\n    // If true, a bounding box will show the area currently being previewed\n    // during mouse hover\n    const hoverBoundingBox = options[\"hoverBoundingBox\"] || false;\n    // If true, a bounding box will show the area currently being previewed\n    // during touch events\n    const touchBoundingBox = options[\"touchBoundingBox\"] || false;\n    // A DOM element to append the bounding box to.\n    const boundingBoxContainer = options[\"boundingBoxContainer\"] || document.body;\n\n    if (inlinePane !== true && !isDOMElement(paneContainer)) {\n      throw new TypeError(\"`paneContainer` must be a DOM element when `inlinePane !== true`\");\n    }\n    if (!isDOMElement(inlineContainer)) {\n      throw new TypeError(\"`inlineContainer` must be a DOM element\");\n    }\n\n    this.settings = {\n      namespace,\n      showWhitespaceAtEdges,\n      containInline,\n      inlineOffsetX,\n      inlineOffsetY,\n      inlineContainer,\n      sourceAttribute,\n      zoomFactor,\n      paneContainer,\n      inlinePane,\n      handleTouch,\n      onShow,\n      onHide,\n      injectBaseStyles,\n      hoverDelay,\n      touchDelay,\n      hoverBoundingBox,\n      touchBoundingBox,\n      boundingBoxContainer\n    };\n\n    if (this.settings.injectBaseStyles) {\n      injectBaseStylesheet();\n    }\n\n    this._buildZoomPane();\n    this._buildTrigger();\n  }\n\n  get isShowing() {\n    return this.zoomPane.isShowing;\n  }\n\n  get zoomFactor() {\n    return this.settings.zoomFactor;\n  }\n\n  set zoomFactor(zf) {\n    this.settings.zoomFactor = zf;\n    this.zoomPane.settings.zoomFactor = zf;\n    this.trigger.settings.zoomFactor = zf;\n    this.boundingBox.settings.zoomFactor = zf;\n  }\n\n  _buildZoomPane() {\n    this.zoomPane = new ZoomPane({\n      container: this.settings.paneContainer,\n      zoomFactor: this.settings.zoomFactor,\n      showWhitespaceAtEdges: this.settings.showWhitespaceAtEdges,\n      containInline: this.settings.containInline,\n      inline: this.settings.inlinePane,\n      namespace: this.settings.namespace,\n      inlineOffsetX: this.settings.inlineOffsetX,\n      inlineOffsetY: this.settings.inlineOffsetY,\n      inlineContainer: this.settings.inlineContainer\n    });\n  }\n\n  _buildTrigger() {\n    this.trigger = new Trigger({\n      el: this.triggerEl,\n      zoomPane: this.zoomPane,\n      handleTouch: this.settings.handleTouch,\n      onShow: this.settings.onShow,\n      onHide: this.settings.onHide,\n      sourceAttribute: this.settings.sourceAttribute,\n      hoverDelay: this.settings.hoverDelay,\n      touchDelay: this.settings.touchDelay,\n      hoverBoundingBox: this.settings.hoverBoundingBox,\n      touchBoundingBox: this.settings.touchBoundingBox,\n      namespace: this.settings.namespace,\n      zoomFactor: this.settings.zoomFactor,\n      boundingBoxContainer: this.settings.boundingBoxContainer\n    });\n  }\n\n  setZoomImageURL(imageURL) {\n    this.zoomPane._setImageURL(imageURL);\n  }\n\n  disable() {\n    this.trigger.enabled = false;\n  }\n\n  enable() {\n    this.trigger.enabled = true;\n  }\n\n  destroy() {\n    this.trigger._hide();\n    this.trigger._unbindEvents();\n  }\n}\n\n// Public API\n/* eslint-disable no-self-assign */\nObject.defineProperty(Drift.prototype, \"isShowing\", {\n  get: function() {\n    return this.isShowing;\n  }\n});\nObject.defineProperty(Drift.prototype, \"zoomFactor\", {\n  get: function() {\n    return this.zoomFactor;\n  },\n  set: function(value) {\n    this.zoomFactor = value;\n  }\n});\nDrift.prototype[\"setZoomImageURL\"] = Drift.prototype.setZoomImageURL;\nDrift.prototype[\"disable\"] = Drift.prototype.disable;\nDrift.prototype[\"enable\"] = Drift.prototype.enable;\nDrift.prototype[\"destroy\"] = Drift.prototype.destroy;\n/* eslint-enable no-self-assign */\n","/* UNMINIFIED RULES\n\nconst RULES = `\n@keyframes noop {\n  0% { zoom: 1; }\n}\n\n@-webkit-keyframes noop {\n  0% { zoom: 1; }\n}\n\n.drift-zoom-pane.drift-open {\n  display: block;\n}\n\n.drift-zoom-pane.drift-opening, .drift-zoom-pane.drift-closing {\n  animation: noop 1ms;\n  -webkit-animation: noop 1ms;\n}\n\n.drift-zoom-pane {\n  position: absolute;\n  overflow: hidden;\n  width: 100%;\n  height: 100%;\n  top: 0;\n  left: 0;\n  pointer-events: none;\n}\n\n.drift-zoom-pane-loader {\n  display: none;\n}\n\n.drift-zoom-pane img {\n  position: absolute;\n  display: block;\n  max-width: none;\n  max-height: none;\n}\n\n.drift-bounding-box {\n  position: absolute;\n  pointer-events: none;\n}\n`;\n\n*/\n\nconst RULES =\n  \".drift-bounding-box,.drift-zoom-pane{position:absolute;pointer-events:none}@keyframes noop{0%{zoom:1}}@-webkit-keyframes noop{0%{zoom:1}}.drift-zoom-pane.drift-open{display:block}.drift-zoom-pane.drift-closing,.drift-zoom-pane.drift-opening{animation:noop 1ms;-webkit-animation:noop 1ms}.drift-zoom-pane{overflow:hidden;width:100%;height:100%;top:0;left:0}.drift-zoom-pane-loader{display:none}.drift-zoom-pane img{position:absolute;display:block;max-width:none;max-height:none}\";\n\nexport default function injectBaseStylesheet() {\n  if (document.querySelector(\".drift-base-styles\")) {\n    return;\n  }\n\n  const styleEl = document.createElement(\"style\");\n  styleEl.type = \"text/css\";\n  styleEl.classList.add(\"drift-base-styles\");\n\n  styleEl.appendChild(document.createTextNode(RULES));\n\n  const head = document.head;\n  head.insertBefore(styleEl, head.firstChild);\n}\n","import throwIfMissing from \"./util/throwIfMissing\";\nimport { addClasses, removeClasses } from \"./util/dom\";\n\n// All officially-supported browsers have this, but it's easy to\n// account for, just in case.\nconst divStyle = document.createElement(\"div\").style;\n\nconst HAS_ANIMATION =\n  typeof document === \"undefined\" ? false : \"animation\" in divStyle || \"webkitAnimation\" in divStyle;\n\nexport default class ZoomPane {\n  constructor(options = {}) {\n    this._completeShow = this._completeShow.bind(this);\n    this._completeHide = this._completeHide.bind(this);\n    this._handleLoad = this._handleLoad.bind(this);\n\n    this.isShowing = false;\n\n    const {\n      container = null,\n      zoomFactor = throwIfMissing(),\n      inline = throwIfMissing(),\n      namespace = null,\n      showWhitespaceAtEdges = throwIfMissing(),\n      containInline = throwIfMissing(),\n      inlineOffsetX = 0,\n      inlineOffsetY = 0,\n      inlineContainer = document.body\n    } = options;\n\n    this.settings = {\n      container,\n      zoomFactor,\n      inline,\n      namespace,\n      showWhitespaceAtEdges,\n      containInline,\n      inlineOffsetX,\n      inlineOffsetY,\n      inlineContainer\n    };\n\n    this.openClasses = this._buildClasses(\"open\");\n    this.openingClasses = this._buildClasses(\"opening\");\n    this.closingClasses = this._buildClasses(\"closing\");\n    this.inlineClasses = this._buildClasses(\"inline\");\n    this.loadingClasses = this._buildClasses(\"loading\");\n\n    this._buildElement();\n  }\n\n  _buildClasses(suffix) {\n    const classes = [`drift-${suffix}`];\n\n    const ns = this.settings.namespace;\n    if (ns) {\n      classes.push(`${ns}-${suffix}`);\n    }\n\n    return classes;\n  }\n\n  _buildElement() {\n    this.el = document.createElement(\"div\");\n    addClasses(this.el, this._buildClasses(\"zoom-pane\"));\n\n    const loaderEl = document.createElement(\"div\");\n    addClasses(loaderEl, this._buildClasses(\"zoom-pane-loader\"));\n    this.el.appendChild(loaderEl);\n\n    this.imgEl = document.createElement(\"img\");\n    this.el.appendChild(this.imgEl);\n  }\n\n  _setImageURL(imageURL) {\n    this.imgEl.setAttribute(\"src\", imageURL);\n  }\n\n  _setImageSize(triggerWidth, triggerHeight) {\n    this.imgEl.style.width = `${triggerWidth * this.settings.zoomFactor}px`;\n    this.imgEl.style.height = `${triggerHeight * this.settings.zoomFactor}px`;\n  }\n\n  // `percentageOffsetX` and `percentageOffsetY` must be percentages\n  // expressed as floats between `0' and `1`.\n  setPosition(percentageOffsetX, percentageOffsetY, triggerRect) {\n    const imgElWidth = this.imgEl.offsetWidth;\n    const imgElHeight = this.imgEl.offsetHeight;\n    const elWidth = this.el.offsetWidth;\n    const elHeight = this.el.offsetHeight;\n\n    const centreOfContainerX = elWidth / 2;\n    const centreOfContainerY = elHeight / 2;\n\n    const targetImgXToBeCentre = imgElWidth * percentageOffsetX;\n    const targetImgYToBeCentre = imgElHeight * percentageOffsetY;\n\n    let left = centreOfContainerX - targetImgXToBeCentre;\n    let top = centreOfContainerY - targetImgYToBeCentre;\n\n    const differenceBetweenContainerWidthAndImgWidth = elWidth - imgElWidth;\n    const differenceBetweenContainerHeightAndImgHeight = elHeight - imgElHeight;\n    const isContainerLargerThanImgX = differenceBetweenContainerWidthAndImgWidth > 0;\n    const isContainerLargerThanImgY = differenceBetweenContainerHeightAndImgHeight > 0;\n\n    const minLeft = isContainerLargerThanImgX ? differenceBetweenContainerWidthAndImgWidth / 2 : 0;\n    const minTop = isContainerLargerThanImgY ? differenceBetweenContainerHeightAndImgHeight / 2 : 0;\n\n    const maxLeft = isContainerLargerThanImgX\n      ? differenceBetweenContainerWidthAndImgWidth / 2\n      : differenceBetweenContainerWidthAndImgWidth;\n    const maxTop = isContainerLargerThanImgY\n      ? differenceBetweenContainerHeightAndImgHeight / 2\n      : differenceBetweenContainerHeightAndImgHeight;\n\n    if (this.el.parentElement === this.settings.inlineContainer) {\n      // This may be needed in the future to deal with browser event\n      // inconsistencies, but it's difficult to tell for sure.\n      // let scrollX = isTouch ? 0 : window.scrollX;\n      // let scrollY = isTouch ? 0 : window.scrollY;\n      const scrollX = window.pageXOffset;\n      const scrollY = window.pageYOffset;\n\n      let inlineLeft =\n        triggerRect.left + percentageOffsetX * triggerRect.width - elWidth / 2 + this.settings.inlineOffsetX + scrollX;\n      let inlineTop =\n        triggerRect.top + percentageOffsetY * triggerRect.height - elHeight / 2 + this.settings.inlineOffsetY + scrollY;\n\n      if (this.settings.containInline) {\n        if (inlineLeft < triggerRect.left + scrollX) {\n          inlineLeft = triggerRect.left + scrollX;\n        } else if (inlineLeft + elWidth > triggerRect.left + triggerRect.width + scrollX) {\n          inlineLeft = triggerRect.left + triggerRect.width - elWidth + scrollX;\n        }\n\n        if (inlineTop < triggerRect.top + scrollY) {\n          inlineTop = triggerRect.top + scrollY;\n        } else if (inlineTop + elHeight > triggerRect.top + triggerRect.height + scrollY) {\n          inlineTop = triggerRect.top + triggerRect.height - elHeight + scrollY;\n        }\n      }\n\n      this.el.style.left = `${inlineLeft}px`;\n      this.el.style.top = `${inlineTop}px`;\n    }\n\n    if (!this.settings.showWhitespaceAtEdges) {\n      if (left > minLeft) {\n        left = minLeft;\n      } else if (left < maxLeft) {\n        left = maxLeft;\n      }\n\n      if (top > minTop) {\n        top = minTop;\n      } else if (top < maxTop) {\n        top = maxTop;\n      }\n    }\n\n    this.imgEl.style.transform = `translate(${left}px, ${top}px)`;\n    this.imgEl.style.webkitTransform = `translate(${left}px, ${top}px)`;\n  }\n\n  get _isInline() {\n    const inline = this.settings.inline;\n\n    return inline === true || (typeof inline === \"number\" && window.innerWidth <= inline);\n  }\n\n  _removeListenersAndResetClasses() {\n    this.el.removeEventListener(\"animationend\", this._completeShow, false);\n    this.el.removeEventListener(\"animationend\", this._completeHide, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n    removeClasses(this.el, this.openClasses);\n    removeClasses(this.el, this.closingClasses);\n  }\n\n  show(imageURL, triggerWidth, triggerHeight) {\n    this._removeListenersAndResetClasses();\n    this.isShowing = true;\n\n    addClasses(this.el, this.openClasses);\n\n    if (this.imgEl.getAttribute(\"src\") != imageURL) {\n      addClasses(this.el, this.loadingClasses);\n      this.imgEl.addEventListener(\"load\", this._handleLoad, false);\n      this._setImageURL(imageURL);\n    }\n\n    this._setImageSize(triggerWidth, triggerHeight);\n\n    if (this._isInline) {\n      this._showInline();\n    } else {\n      this._showInContainer();\n    }\n\n    if (HAS_ANIMATION) {\n      this.el.addEventListener(\"animationend\", this._completeShow, false);\n      this.el.addEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n      addClasses(this.el, this.openingClasses);\n    }\n  }\n\n  _showInline() {\n    this.settings.inlineContainer.appendChild(this.el);\n    addClasses(this.el, this.inlineClasses);\n  }\n\n  _showInContainer() {\n    this.settings.container.appendChild(this.el);\n  }\n\n  hide() {\n    this._removeListenersAndResetClasses();\n    this.isShowing = false;\n\n    if (HAS_ANIMATION) {\n      this.el.addEventListener(\"animationend\", this._completeHide, false);\n      this.el.addEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n      addClasses(this.el, this.closingClasses);\n    } else {\n      removeClasses(this.el, this.openClasses);\n      removeClasses(this.el, this.inlineClasses);\n    }\n  }\n\n  _completeShow() {\n    this.el.removeEventListener(\"animationend\", this._completeShow, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeShow, false);\n\n    removeClasses(this.el, this.openingClasses);\n  }\n\n  _completeHide() {\n    this.el.removeEventListener(\"animationend\", this._completeHide, false);\n    this.el.removeEventListener(\"webkitAnimationEnd\", this._completeHide, false);\n\n    removeClasses(this.el, this.openClasses);\n    removeClasses(this.el, this.closingClasses);\n    removeClasses(this.el, this.inlineClasses);\n\n    this.el.setAttribute(\"style\", \"\");\n\n    // The window could have been resized above or below `inline`\n    // limits since the ZoomPane was shown. Because of this, we\n    // can't rely on `this._isInline` here.\n    if (this.el.parentElement === this.settings.container) {\n      this.settings.container.removeChild(this.el);\n    } else if (this.el.parentElement === this.settings.inlineContainer) {\n      this.settings.inlineContainer.removeChild(this.el);\n    }\n  }\n\n  _handleLoad() {\n    this.imgEl.removeEventListener(\"load\", this._handleLoad, false);\n    removeClasses(this.el, this.loadingClasses);\n  }\n}\n","import throwIfMissing from \"./util/throwIfMissing\";\nimport BoundingBox from \"./BoundingBox\";\n\nexport default class Trigger {\n  constructor(options = {}) {\n    this._show = this._show.bind(this);\n    this._hide = this._hide.bind(this);\n    this._handleEntry = this._handleEntry.bind(this);\n    this._handleMovement = this._handleMovement.bind(this);\n\n    const {\n      el = throwIfMissing(),\n      zoomPane = throwIfMissing(),\n      sourceAttribute = throwIfMissing(),\n      handleTouch = throwIfMissing(),\n      onShow = null,\n      onHide = null,\n      hoverDelay = 0,\n      touchDelay = 0,\n      hoverBoundingBox = throwIfMissing(),\n      touchBoundingBox = throwIfMissing(),\n      namespace = null,\n      zoomFactor = throwIfMissing(),\n      boundingBoxContainer = throwIfMissing()\n    } = options;\n\n    this.settings = {\n      el,\n      zoomPane,\n      sourceAttribute,\n      handleTouch,\n      onShow,\n      onHide,\n      hoverDelay,\n      touchDelay,\n      hoverBoundingBox,\n      touchBoundingBox,\n      namespace,\n      zoomFactor,\n      boundingBoxContainer\n    };\n\n    if (this.settings.hoverBoundingBox || this.settings.touchBoundingBox) {\n      this.boundingBox = new BoundingBox({\n        namespace: this.settings.namespace,\n        zoomFactor: this.settings.zoomFactor,\n        containerEl: this.settings.boundingBoxContainer\n      });\n    }\n\n    this.enabled = true;\n\n    this._bindEvents();\n  }\n\n  get isShowing() {\n    return this.settings.zoomPane.isShowing;\n  }\n\n  _preventDefault(event) {\n    event.preventDefault();\n  }\n\n  _preventDefaultAllowTouchScroll(event) {\n    if (!this.settings.touchDelay || !this._isTouchEvent(event) || this.isShowing) {\n      event.preventDefault();\n    }\n  }\n\n  _isTouchEvent(event) {\n    return !!event.touches;\n  }\n\n  _bindEvents() {\n    this.settings.el.addEventListener(\"mouseenter\", this._handleEntry, false);\n    this.settings.el.addEventListener(\"mouseleave\", this._hide, false);\n    this.settings.el.addEventListener(\"mousemove\", this._handleMovement, false);\n\n    if (this.settings.handleTouch) {\n      this.settings.el.addEventListener(\"touchstart\", this._handleEntry, false);\n      this.settings.el.addEventListener(\"touchend\", this._hide, false);\n      this.settings.el.addEventListener(\"touchmove\", this._handleMovement, false);\n    } else {\n      this.settings.el.addEventListener(\"touchstart\", this._preventDefault, false);\n      this.settings.el.addEventListener(\"touchend\", this._preventDefault, false);\n      this.settings.el.addEventListener(\"touchmove\", this._preventDefault, false);\n    }\n  }\n\n  _unbindEvents() {\n    this.settings.el.removeEventListener(\"mouseenter\", this._handleEntry, false);\n    this.settings.el.removeEventListener(\"mouseleave\", this._hide, false);\n    this.settings.el.removeEventListener(\"mousemove\", this._handleMovement, false);\n\n    if (this.settings.handleTouch) {\n      this.settings.el.removeEventListener(\"touchstart\", this._handleEntry, false);\n      this.settings.el.removeEventListener(\"touchend\", this._hide, false);\n      this.settings.el.removeEventListener(\"touchmove\", this._handleMovement, false);\n    } else {\n      this.settings.el.removeEventListener(\"touchstart\", this._preventDefault, false);\n      this.settings.el.removeEventListener(\"touchend\", this._preventDefault, false);\n      this.settings.el.removeEventListener(\"touchmove\", this._preventDefault, false);\n    }\n  }\n\n  _handleEntry(e) {\n    this._preventDefaultAllowTouchScroll(e);\n    this._lastMovement = e;\n\n    if (e.type == \"mouseenter\" && this.settings.hoverDelay) {\n      this.entryTimeout = setTimeout(this._show, this.settings.hoverDelay);\n    } else if (this.settings.touchDelay) {\n      this.entryTimeout = setTimeout(this._show, this.settings.touchDelay);\n    } else {\n      this._show();\n    }\n  }\n\n  _show() {\n    if (!this.enabled) {\n      return;\n    }\n\n    const onShow = this.settings.onShow;\n    if (onShow && typeof onShow === \"function\") {\n      onShow();\n    }\n\n    this.settings.zoomPane.show(\n      this.settings.el.getAttribute(this.settings.sourceAttribute),\n      this.settings.el.clientWidth,\n      this.settings.el.clientHeight\n    );\n\n    if (this._lastMovement) {\n      const touchActivated = this._lastMovement.touches;\n      if ((touchActivated && this.settings.touchBoundingBox) || (!touchActivated && this.settings.hoverBoundingBox)) {\n        this.boundingBox.show(this.settings.zoomPane.el.clientWidth, this.settings.zoomPane.el.clientHeight);\n      }\n    }\n\n    this._handleMovement();\n  }\n\n  _hide(e) {\n    if (e) {\n      this._preventDefaultAllowTouchScroll(e);\n    }\n\n    this._lastMovement = null;\n\n    if (this.entryTimeout) {\n      clearTimeout(this.entryTimeout);\n    }\n\n    if (this.boundingBox) {\n      this.boundingBox.hide();\n    }\n\n    const onHide = this.settings.onHide;\n    if (onHide && typeof onHide === \"function\") {\n      onHide();\n    }\n\n    this.settings.zoomPane.hide();\n  }\n\n  _handleMovement(e) {\n    if (e) {\n      this._preventDefaultAllowTouchScroll(e);\n      this._lastMovement = e;\n    } else if (this._lastMovement) {\n      e = this._lastMovement;\n    } else {\n      return;\n    }\n\n    let movementX;\n    let movementY;\n\n    if (e.touches) {\n      const firstTouch = e.touches[0];\n      movementX = firstTouch.clientX;\n      movementY = firstTouch.clientY;\n    } else {\n      movementX = e.clientX;\n      movementY = e.clientY;\n    }\n\n    const el = this.settings.el;\n    const rect = el.getBoundingClientRect();\n    const offsetX = movementX - rect.left;\n    const offsetY = movementY - rect.top;\n\n    const percentageOffsetX = offsetX / this.settings.el.clientWidth;\n    const percentageOffsetY = offsetY / this.settings.el.clientHeight;\n\n    if (this.boundingBox) {\n      this.boundingBox.setPosition(percentageOffsetX, percentageOffsetY, rect);\n    }\n\n    this.settings.zoomPane.setPosition(percentageOffsetX, percentageOffsetY, rect);\n  }\n}\n","import throwIfMissing from \"./util/throwIfMissing\";\nimport { addClasses, removeClasses } from \"./util/dom\";\n\nexport default class BoundingBox {\n  constructor(options) {\n    this.isShowing = false;\n\n    const { namespace = null, zoomFactor = throwIfMissing(), containerEl = throwIfMissing() } = options;\n\n    this.settings = { namespace, zoomFactor, containerEl };\n\n    this.openClasses = this._buildClasses(\"open\");\n\n    this._buildElement();\n  }\n\n  _buildClasses(suffix) {\n    const classes = [`drift-${suffix}`];\n\n    const ns = this.settings.namespace;\n    if (ns) {\n      classes.push(`${ns}-${suffix}`);\n    }\n\n    return classes;\n  }\n\n  _buildElement() {\n    this.el = document.createElement(\"div\");\n    addClasses(this.el, this._buildClasses(\"bounding-box\"));\n  }\n\n  show(zoomPaneWidth, zoomPaneHeight) {\n    this.isShowing = true;\n\n    this.settings.containerEl.appendChild(this.el);\n\n    const style = this.el.style;\n    style.width = `${Math.round(zoomPaneWidth / this.settings.zoomFactor)}px`;\n    style.height = `${Math.round(zoomPaneHeight / this.settings.zoomFactor)}px`;\n\n    addClasses(this.el, this.openClasses);\n  }\n\n  hide() {\n    if (this.isShowing) {\n      this.settings.containerEl.removeChild(this.el);\n    }\n\n    this.isShowing = false;\n\n    removeClasses(this.el, this.openClasses);\n  }\n\n  setPosition(percentageOffsetX, percentageOffsetY, triggerRect) {\n    const pageXOffset = window.pageXOffset;\n    const pageYOffset = window.pageYOffset;\n\n    let inlineLeft = triggerRect.left + percentageOffsetX * triggerRect.width - this.el.clientWidth / 2 + pageXOffset;\n    let inlineTop = triggerRect.top + percentageOffsetY * triggerRect.height - this.el.clientHeight / 2 + pageYOffset;\n\n    if (inlineLeft < triggerRect.left + pageXOffset) {\n      inlineLeft = triggerRect.left + pageXOffset;\n    } else if (inlineLeft + this.el.clientWidth > triggerRect.left + triggerRect.width + pageXOffset) {\n      inlineLeft = triggerRect.left + triggerRect.width - this.el.clientWidth + pageXOffset;\n    }\n\n    if (inlineTop < triggerRect.top + pageYOffset) {\n      inlineTop = triggerRect.top + pageYOffset;\n    } else if (inlineTop + this.el.clientHeight > triggerRect.top + triggerRect.height + pageYOffset) {\n      inlineTop = triggerRect.top + triggerRect.height - this.el.clientHeight + pageYOffset;\n    }\n\n    this.el.style.left = `${inlineLeft}px`;\n    this.el.style.top = `${inlineTop}px`;\n  }\n}\n","// This is not really a perfect check, but works fine.\n// From http://stackoverflow.com/questions/384286\nconst HAS_DOM_2 = typeof HTMLElement === \"object\";\n\nexport function isDOMElement(obj) {\n  return HAS_DOM_2\n    ? obj instanceof HTMLElement\n    : obj && typeof obj === \"object\" && obj !== null && obj.nodeType === 1 && typeof obj.nodeName === \"string\";\n}\n\nexport function addClasses(el, classNames) {\n  classNames.forEach(function(className) {\n    el.classList.add(className);\n  });\n}\n\nexport function removeClasses(el, classNames) {\n  classNames.forEach(function(className) {\n    el.classList.remove(className);\n  });\n}\n","export default function throwIfMissing() {\n  throw new Error(\"Missing parameter\");\n}\n","// This file is used for the standalone browser build\n\nimport Drift from \"./Drift\";\n\nwindow[\"Drift\"] = Drift;\n"],"sourceRoot":""}