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This file is part of Moodle - http://moodle.org/\n//\n// Moodle is free software: you can redistribute it and/or modify\n// it under the terms of the GNU General Public License as published by\n// the Free Software Foundation, either version 3 of the License, or\n// (at your option) any later version.\n//\n// Moodle is distributed in the hope that it will be useful,\n// but WITHOUT ANY WARRANTY; without even the implied warranty of\n// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n// GNU General Public License for more details.\n//\n// You should have received a copy of the GNU General Public License\n// along with Moodle. If not, see <http://www.gnu.org/licenses/>.\n\n/**\n * Contain the logic for modals.\n *\n * @module core/modal\n * @class core/modal\n * @copyright 2016 Ryan Wyllie <ryan@moodle.com>\n * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later\n */\ndefine([\n 'jquery',\n 'core/templates',\n 'core/notification',\n 'core/key_codes',\n 'core/custom_interaction_events',\n 'core/modal_backdrop',\n 'core/event',\n 'core/modal_events',\n 'core/local/aria/focuslock',\n 'core/pending',\n 'core/aria',\n 'core/fullscreen'\n], function(\n $,\n Templates,\n Notification,\n KeyCodes,\n CustomEvents,\n ModalBackdrop,\n Event,\n ModalEvents,\n FocusLock,\n Pending,\n Aria,\n Fullscreen\n) {\n\n var SELECTORS = {\n CONTAINER: '[data-region=\"modal-container\"]',\n MODAL: '[data-region=\"modal\"]',\n HEADER: '[data-region=\"header\"]',\n TITLE: '[data-region=\"title\"]',\n BODY: '[data-region=\"body\"]',\n FOOTER: '[data-region=\"footer\"]',\n HIDE: '[data-action=\"hide\"]',\n DIALOG: '[role=dialog]',\n FORM: 'form',\n MENU_BAR: '[role=menubar]',\n HAS_Z_INDEX: '.moodle-has-zindex',\n CAN_RECEIVE_FOCUS: 'input:not([type=\"hidden\"]), a[href], button, textarea, select, [tabindex]',\n };\n\n var TEMPLATES = {\n LOADING: 'core/loading',\n BACKDROP: 'core/modal_backdrop',\n };\n\n /**\n * Module singleton for the backdrop to be reused by all Modal instances.\n */\n var backdropPromise;\n\n /**\n * A counter that gets incremented for each modal created. This can be\n * used to generate unique values for the modals.\n */\n var modalCounter = 0;\n\n /**\n * Constructor for the Modal.\n *\n * @param {object} root The root jQuery element for the modal\n */\n var Modal = function(root) {\n this.root = $(root);\n this.modal = this.root.find(SELECTORS.MODAL);\n this.header = this.modal.find(SELECTORS.HEADER);\n this.headerPromise = $.Deferred();\n this.title = this.header.find(SELECTORS.TITLE);\n this.titlePromise = $.Deferred();\n this.body = this.modal.find(SELECTORS.BODY);\n this.bodyPromise = $.Deferred();\n this.footer = this.modal.find(SELECTORS.FOOTER);\n this.footerPromise = $.Deferred();\n this.hiddenSiblings = [];\n this.isAttached = false;\n this.bodyJS = null;\n this.footerJS = null;\n this.modalCount = modalCounter++;\n this.attachmentPoint = document.createElement('div');\n document.body.append(this.attachmentPoint);\n\n if (!this.root.is(SELECTORS.CONTAINER)) {\n Notification.exception({message: 'Element is not a modal container'});\n }\n\n if (!this.modal.length) {\n Notification.exception({message: 'Container does not contain a modal'});\n }\n\n if (!this.header.length) {\n Notification.exception({message: 'Modal is missing a header region'});\n }\n\n if (!this.title.length) {\n Notification.exception({message: 'Modal header is missing a title region'});\n }\n\n if (!this.body.length) {\n Notification.exception({message: 'Modal is missing a body region'});\n }\n\n if (!this.footer.length) {\n Notification.exception({message: 'Modal is missing a footer region'});\n }\n\n this.registerEventListeners();\n };\n\n /**\n * Attach the modal to the correct part of the page.\n *\n * If it hasn't already been added it runs any\n * javascript that has been cached until now.\n *\n * @method attachToDOM\n */\n Modal.prototype.attachToDOM = function() {\n this.getAttachmentPoint().append(this.root);\n\n if (this.isAttached) {\n return;\n }\n\n FocusLock.trapFocus(this.root[0]);\n\n // If we'd cached any JS then we can run it how that the modal is\n // attached to the DOM.\n if (this.bodyJS) {\n Templates.runTemplateJS(this.bodyJS);\n this.bodyJS = null;\n }\n\n if (this.footerJS) {\n Templates.runTemplateJS(this.footerJS);\n this.footerJS = null;\n }\n\n this.isAttached = true;\n };\n\n /**\n * Count the number of other visible modals (not including this one).\n *\n * @method countOtherVisibleModals\n * @return {int}\n */\n Modal.prototype.countOtherVisibleModals = function() {\n var count = 0;\n $('body').find(SELECTORS.CONTAINER).each(function(index, element) {\n element = $(element);\n\n // If we haven't found ourself and the element is visible.\n if (!this.root.is(element) && element.hasClass('show')) {\n count++;\n }\n }.bind(this));\n\n return count;\n };\n\n /**\n * Get the modal backdrop.\n *\n * @method getBackdrop\n * @return {object} jQuery promise\n */\n Modal.prototype.getBackdrop = function() {\n if (!backdropPromise) {\n backdropPromise = Templates.render(TEMPLATES.BACKDROP, {})\n .then(function(html) {\n var element = $(html);\n\n return new ModalBackdrop(element);\n })\n .fail(Notification.exception);\n }\n\n return backdropPromise;\n };\n\n /**\n * Get the root element of this modal.\n *\n * @method getRoot\n * @return {object} jQuery object\n */\n Modal.prototype.getRoot = function() {\n return this.root;\n };\n\n /**\n * Get the modal element of this modal.\n *\n * @method getModal\n * @return {object} jQuery object\n */\n Modal.prototype.getModal = function() {\n return this.modal;\n };\n\n /**\n * Get the modal title element.\n *\n * @method getTitle\n * @return {object} jQuery object\n */\n Modal.prototype.getTitle = function() {\n return this.title;\n };\n\n /**\n * Get the modal body element.\n *\n * @method getBody\n * @return {object} jQuery object\n */\n Modal.prototype.getBody = function() {\n return this.body;\n };\n\n /**\n * Get the modal footer element.\n *\n * @method getFooter\n * @return {object} jQuery object\n */\n Modal.prototype.getFooter = function() {\n return this.footer;\n };\n\n /**\n * Get a promise resolving to the title region.\n *\n * @method getTitlePromise\n * @return {Promise}\n */\n Modal.prototype.getTitlePromise = function() {\n return this.titlePromise;\n };\n\n /**\n * Get a promise resolving to the body region.\n *\n * @method getBodyPromise\n * @return {object} jQuery object\n */\n Modal.prototype.getBodyPromise = function() {\n return this.bodyPromise;\n };\n\n /**\n * Get a promise resolving to the footer region.\n *\n * @method getFooterPromise\n * @return {object} jQuery object\n */\n Modal.prototype.getFooterPromise = function() {\n return this.footerPromise;\n };\n\n /**\n * Get the unique modal count.\n *\n * @method getModalCount\n * @return {int}\n */\n Modal.prototype.getModalCount = function() {\n return this.modalCount;\n };\n\n /**\n * Set the modal title element.\n *\n * This method is overloaded to take either a string value for the title or a jQuery promise that is resolved with\n * HTML most commonly from a Str.get_string call.\n *\n * @method setTitle\n * @param {(string|object)} value The title string or jQuery promise which resolves to the title.\n */\n Modal.prototype.setTitle = function(value) {\n var title = this.getTitle();\n this.titlePromise = $.Deferred();\n\n this.asyncSet(value, title.html.bind(title))\n .then(function() {\n this.titlePromise.resolve(title);\n }.bind(this))\n .catch(Notification.exception);\n };\n\n /**\n * Set the modal body element.\n *\n * This method is overloaded to take either a string value for the body or a jQuery promise that is resolved with\n * HTML and Javascript most commonly from a Templates.render call.\n *\n * @method setBody\n * @param {(string|object)} value The body string or jQuery promise which resolves to the body.\n */\n Modal.prototype.setBody = function(value) {\n this.bodyPromise = $.Deferred();\n\n var body = this.getBody();\n\n if (typeof value === 'string') {\n // Just set the value if it's a string.\n body.html(value);\n Event.notifyFilterContentUpdated(body);\n this.getRoot().trigger(ModalEvents.bodyRendered, this);\n this.bodyPromise.resolve(body);\n } else {\n var jsPendingId = 'amd-modal-js-pending-id-' + this.getModalCount();\n M.util.js_pending(jsPendingId);\n // Otherwise we assume it's a promise to be resolved with\n // html and javascript.\n var contentPromise = null;\n body.css('overflow', 'hidden');\n\n // Ensure that the `value` is a jQuery Promise.\n value = $.when(value);\n\n if (value.state() == 'pending') {\n // We're still waiting for the body promise to resolve so\n // let's show a loading icon.\n var height = body.innerHeight();\n if (height < 100) {\n height = 100;\n }\n\n body.animate({height: height + 'px'}, 150);\n\n body.html('');\n contentPromise = Templates.render(TEMPLATES.LOADING, {})\n .then(function(html) {\n var loadingIcon = $(html).hide();\n body.html(loadingIcon);\n loadingIcon.fadeIn(150);\n\n // We only want the loading icon to fade out\n // when the content for the body has finished\n // loading.\n return $.when(loadingIcon.promise(), value);\n })\n .then(function(loadingIcon) {\n // Once the content has finished loading and\n // the loading icon has been shown then we can\n // fade the icon away to reveal the content.\n return loadingIcon.fadeOut(100).promise();\n })\n .then(function() {\n return value;\n });\n } else {\n // The content is already loaded so let's just display\n // it to the user. No need for a loading icon.\n contentPromise = value;\n }\n\n // Now we can actually display the content.\n contentPromise.then(function(html, js) {\n var result = null;\n\n if (this.isVisible()) {\n // If the modal is visible then we should display\n // the content gracefully for the user.\n body.css('opacity', 0);\n var currentHeight = body.innerHeight();\n body.html(html);\n // We need to clear any height values we've set here\n // in order to measure the height of the content being\n // added. This then allows us to animate the height\n // transition.\n body.css('height', '');\n var newHeight = body.innerHeight();\n body.css('height', currentHeight + 'px');\n result = body.animate(\n {height: newHeight + 'px', opacity: 1},\n {duration: 150, queue: false}\n ).promise();\n } else {\n // Since the modal isn't visible we can just immediately\n // set the content. No need to animate it.\n body.html(html);\n }\n\n if (js) {\n if (this.isAttached) {\n // If we're in the DOM then run the JS immediately.\n Templates.runTemplateJS(js);\n } else {\n // Otherwise cache it to be run when we're attached.\n this.bodyJS = js;\n }\n }\n\n return result;\n }.bind(this))\n .then(function(result) {\n Event.notifyFilterContentUpdated(body);\n this.getRoot().trigger(ModalEvents.bodyRendered, this);\n return result;\n }.bind(this))\n .then(function() {\n this.bodyPromise.resolve(body);\n return;\n }.bind(this))\n .fail(Notification.exception)\n .always(function() {\n // When we're done displaying all of the content we need\n // to clear the custom values we've set here.\n body.css('height', '');\n body.css('overflow', '');\n body.css('opacity', '');\n M.util.js_complete(jsPendingId);\n\n return;\n })\n .fail(Notification.exception);\n }\n };\n\n /**\n * Set the modal footer element. The footer element is made visible, if it\n * isn't already.\n *\n * This method is overloaded to take either a string\n * value for the body or a jQuery promise that is resolved with HTML and Javascript\n * most commonly from a Templates.render call.\n *\n * @method setFooter\n * @param {(string|object)} value The footer string or jQuery promise\n */\n Modal.prototype.setFooter = function(value) {\n // Make sure the footer is visible.\n this.showFooter();\n this.footerPromise = $.Deferred();\n\n var footer = this.getFooter();\n\n if (typeof value === 'string') {\n // Just set the value if it's a string.\n footer.html(value);\n this.footerPromise.resolve(footer);\n } else {\n // Otherwise we assume it's a promise to be resolved with\n // html and javascript.\n Templates.render(TEMPLATES.LOADING, {})\n .then(function(html) {\n footer.html(html);\n\n return value;\n })\n .then(function(html, js) {\n footer.html(html);\n\n if (js) {\n if (this.isAttached) {\n // If we're in the DOM then run the JS immediately.\n Templates.runTemplateJS(js);\n } else {\n // Otherwise cache it to be run when we're attached.\n this.footerJS = js;\n }\n }\n\n return footer;\n }.bind(this))\n .then(function(footer) {\n this.footerPromise.resolve(footer);\n return;\n }.bind(this))\n .catch(Notification.exception);\n }\n };\n\n /**\n * Check if the footer has any content in it.\n *\n * @method hasFooterContent\n * @return {bool}\n */\n Modal.prototype.hasFooterContent = function() {\n return this.getFooter().children().length ? true : false;\n };\n\n /**\n * Hide the footer element.\n *\n * @method hideFooter\n */\n Modal.prototype.hideFooter = function() {\n this.getFooter().addClass('hidden');\n };\n\n /**\n * Show the footer element.\n *\n * @method showFooter\n */\n Modal.prototype.showFooter = function() {\n this.getFooter().removeClass('hidden');\n };\n\n /**\n * Mark the modal as a large modal.\n *\n * @method setLarge\n */\n Modal.prototype.setLarge = function() {\n if (this.isLarge()) {\n return;\n }\n\n this.getModal().addClass('modal-lg');\n };\n\n /**\n * Check if the modal is a large modal.\n *\n * @method isLarge\n * @return {bool}\n */\n Modal.prototype.isLarge = function() {\n return this.getModal().hasClass('modal-lg');\n };\n\n /**\n * Mark the modal as a small modal.\n *\n * @method setSmall\n */\n Modal.prototype.setSmall = function() {\n if (this.isSmall()) {\n return;\n }\n\n this.getModal().removeClass('modal-lg');\n };\n\n /**\n * Check if the modal is a small modal.\n *\n * @method isSmall\n * @return {bool}\n */\n Modal.prototype.isSmall = function() {\n return !this.getModal().hasClass('modal-lg');\n };\n\n /**\n * Set this modal to be scrollable or not.\n *\n * @method setScrollable\n * @param {bool} value Whether the modal is scrollable or not\n */\n Modal.prototype.setScrollable = function(value) {\n if (!value) {\n this.getModal()[0].classList.remove('modal-dialog-scrollable');\n return;\n }\n\n this.getModal()[0].classList.add('modal-dialog-scrollable');\n };\n\n\n /**\n * Determine the highest z-index value currently on the page.\n *\n * @method calculateZIndex\n * @return {int}\n */\n Modal.prototype.calculateZIndex = function() {\n var items = $(SELECTORS.DIALOG + ', ' + SELECTORS.MENU_BAR + ', ' + SELECTORS.HAS_Z_INDEX);\n var zIndex = parseInt(this.root.css('z-index'));\n\n items.each(function(index, item) {\n item = $(item);\n // Note that webkit browsers won't return the z-index value from the CSS stylesheet\n // if the element doesn't have a position specified. Instead it'll return \"auto\".\n var itemZIndex = item.css('z-index') ? parseInt(item.css('z-index')) : 0;\n\n if (itemZIndex > zIndex) {\n zIndex = itemZIndex;\n }\n });\n\n return zIndex;\n };\n\n /**\n * Check if this modal is visible.\n *\n * @method isVisible\n * @return {bool}\n */\n Modal.prototype.isVisible = function() {\n return this.root.hasClass('show');\n };\n\n /**\n * Check if this modal has focus.\n *\n * @method hasFocus\n * @return {bool}\n */\n Modal.prototype.hasFocus = function() {\n var target = $(document.activeElement);\n return this.root.is(target) || this.root.has(target).length;\n };\n\n /**\n * Check if this modal has CSS transitions applied.\n *\n * @method hasTransitions\n * @return {bool}\n */\n Modal.prototype.hasTransitions = function() {\n return this.getRoot().hasClass('fade');\n };\n\n /**\n * Gets the jQuery wrapped node that the Modal should be attached to.\n *\n * @returns {jQuery}\n */\n Modal.prototype.getAttachmentPoint = function() {\n return $(Fullscreen.getElement() || this.attachmentPoint);\n };\n\n /**\n * Display this modal. The modal will be attached to the DOM if it hasn't\n * already been.\n *\n * @method show\n * @returns {Promise}\n */\n Modal.prototype.show = function() {\n if (this.isVisible()) {\n return $.Deferred().resolve();\n }\n\n var pendingPromise = new Pending('core/modal:show');\n\n if (this.hasFooterContent()) {\n this.showFooter();\n } else {\n this.hideFooter();\n }\n\n this.attachToDOM();\n\n return this.getBackdrop()\n .then(function(backdrop) {\n var currentIndex = this.calculateZIndex();\n var newIndex = currentIndex + 2;\n var newBackdropIndex = newIndex - 1;\n this.root.css('z-index', newIndex);\n backdrop.setZIndex(newBackdropIndex);\n backdrop.show();\n\n this.root.removeClass('hide').addClass('show');\n this.accessibilityShow();\n this.getModal().focus();\n $('body').addClass('modal-open');\n this.root.trigger(ModalEvents.shown, this);\n\n return;\n }.bind(this))\n .then(pendingPromise.resolve);\n };\n\n /**\n * Hide this modal if it does not contain a form.\n *\n * @method hideIfNotForm\n */\n Modal.prototype.hideIfNotForm = function() {\n var formElement = this.modal.find(SELECTORS.FORM);\n if (formElement.length == 0) {\n this.hide();\n }\n };\n\n /**\n * Hide this modal.\n *\n * @method hide\n */\n Modal.prototype.hide = function() {\n this.getBackdrop().done(function(backdrop) {\n FocusLock.untrapFocus();\n\n if (!this.countOtherVisibleModals()) {\n // Hide the backdrop if we're the last open modal.\n backdrop.hide();\n $('body').removeClass('modal-open');\n }\n\n var currentIndex = parseInt(this.root.css('z-index'));\n this.root.css('z-index', '');\n backdrop.setZIndex(currentIndex - 3);\n\n this.accessibilityHide();\n\n if (this.hasTransitions()) {\n // Wait for CSS transitions to complete before hiding the element.\n this.getRoot().one('transitionend webkitTransitionEnd oTransitionEnd', function() {\n this.getRoot().removeClass('show').addClass('hide');\n }.bind(this));\n } else {\n this.getRoot().removeClass('show').addClass('hide');\n }\n\n // Ensure the modal is moved onto the body node if it is still attached to the DOM.\n if ($(document.body).find(this.getRoot()).length) {\n $(document.body).append(this.getRoot());\n }\n\n this.root.trigger(ModalEvents.hidden, this);\n }.bind(this));\n };\n\n /**\n * Remove this modal from the DOM.\n *\n * @method destroy\n */\n Modal.prototype.destroy = function() {\n this.hide();\n this.root.remove();\n this.root.trigger(ModalEvents.destroyed, this);\n this.attachmentPoint.remove();\n };\n\n /**\n * Sets the appropriate aria attributes on this dialogue and the other\n * elements in the DOM to ensure that screen readers are able to navigate\n * the dialogue popup correctly.\n *\n * @method accessibilityShow\n */\n Modal.prototype.accessibilityShow = function() {\n // Make us visible to screen readers.\n Aria.unhide(this.root.get());\n\n // Hide siblings.\n Aria.hideSiblings(this.root.get()[0]);\n };\n\n /**\n * Restores the aria visibility on the DOM elements changed when displaying\n * the dialogue popup and makes the dialogue aria hidden to allow screen\n * readers to navigate the main page correctly when the dialogue is closed.\n *\n * @method accessibilityHide\n */\n Modal.prototype.accessibilityHide = function() {\n // Unhide siblings.\n Aria.unhideSiblings(this.root.get()[0]);\n\n // Hide this modal.\n Aria.hide(this.root.get());\n };\n\n /**\n * Set up all of the event handling for the modal.\n *\n * @method registerEventListeners\n */\n Modal.prototype.registerEventListeners = function() {\n this.getRoot().on('keydown', function(e) {\n if (!this.isVisible()) {\n return;\n }\n\n if (e.keyCode == KeyCodes.escape) {\n if (this.removeOnClose) {\n this.destroy();\n } else {\n this.hide();\n }\n }\n }.bind(this));\n\n // Listen for clicks on the modal container.\n this.getRoot().click(function(e) {\n // If the click wasn't inside the modal element then we should\n // hide the modal.\n if (!$(e.target).closest(SELECTORS.MODAL).length) {\n // The check above fails to detect the click was inside the modal when the DOM tree is already changed.\n // So, we check if we can still find the container element or not. If not, then the DOM tree is changed.\n // It's best not to hide the modal in that case.\n if ($(e.target).closest(SELECTORS.CONTAINER).length) {\n var outsideClickEvent = $.Event(ModalEvents.outsideClick);\n this.getRoot().trigger(outsideClickEvent, this);\n\n if (!outsideClickEvent.isDefaultPrevented()) {\n this.hideIfNotForm();\n }\n }\n }\n }.bind(this));\n\n CustomEvents.define(this.getModal(), [CustomEvents.events.activate]);\n this.getModal().on(CustomEvents.events.activate, SELECTORS.HIDE, function(e, data) {\n this.hide();\n data.originalEvent.preventDefault();\n }.bind(this));\n };\n\n /**\n * Register a listener to close the dialogue when the cancel button is pressed.\n *\n * @method registerCloseOnCancel\n */\n Modal.prototype.registerCloseOnCancel = function() {\n // Handle the clicking of the Cancel button.\n this.getModal().on(CustomEvents.events.activate, this.getActionSelector('cancel'), function(e, data) {\n var cancelEvent = $.Event(ModalEvents.cancel);\n this.getRoot().trigger(cancelEvent, this);\n\n if (!cancelEvent.isDefaultPrevented()) {\n data.originalEvent.preventDefault();\n\n if (this.removeOnClose) {\n this.destroy();\n } else {\n this.hide();\n }\n }\n }.bind(this));\n };\n\n /**\n * Register a listener to close the dialogue when the save button is pressed.\n *\n * @method registerCloseOnSave\n */\n Modal.prototype.registerCloseOnSave = function() {\n // Handle the clicking of the Cancel button.\n this.getModal().on(CustomEvents.events.activate, this.getActionSelector('save'), function(e, data) {\n var saveEvent = $.Event(ModalEvents.save);\n this.getRoot().trigger(saveEvent, this);\n\n if (!saveEvent.isDefaultPrevented()) {\n data.originalEvent.preventDefault();\n\n if (this.removeOnClose) {\n this.destroy();\n } else {\n this.hide();\n }\n }\n }.bind(this));\n };\n\n /**\n * Set or resolve and set the value using the function.\n *\n * @method asyncSet\n * @param {(string|object)} value The string or jQuery promise.\n * @param {function} setFunction The setter\n * @return {Promise}\n */\n Modal.prototype.asyncSet = function(value, setFunction) {\n var p = value;\n if (typeof value !== 'object' || !value.hasOwnProperty('then')) {\n p = $.Deferred();\n p.resolve(value);\n }\n\n p.then(function(content) {\n setFunction(content);\n\n return;\n })\n .fail(Notification.exception);\n\n return p;\n };\n\n /**\n * Set the title text of a button.\n *\n * This method is overloaded to take either a string value for the button title or a jQuery promise that is resolved with\n * text most commonly from a Str.get_string call.\n *\n * @param {DOMString} action The action of the button\n * @param {(String|object)} value The button text, or a promise which will resolve to it\n * @returns {Promise}\n */\n Modal.prototype.setButtonText = function(action, value) {\n const button = this.getFooter().find(this.getActionSelector(action));\n\n if (!button) {\n throw new Error(\"Unable to find the '\" + action + \"' button\");\n }\n\n return this.asyncSet(value, button.text.bind(button));\n };\n\n /**\n * Get the Selector for an action.\n *\n * @param {String} action\n * @returns {DOMString}\n */\n Modal.prototype.getActionSelector = function(action) {\n return \"[data-action='\" + action + \"']\";\n };\n\n /**\n * Set the flag to remove the modal from the DOM on close.\n *\n * @param {Boolean} remove\n */\n Modal.prototype.setRemoveOnClose = function(remove) {\n this.removeOnClose = remove;\n };\n\n return Modal;\n});\n"],"file":"modal.min.js"}