text: /**
   * 基于jQuery FullScreen修改
   * 新增支持IE全屏显示
   * Copyright (c) 2019 zuji
   */
  
  /*jshint browser: true, jquery: true */
  (function($){
  	"use strict";
  
  	// These helper functions available only to our plugin scope.
  	function supportFullScreen(){
  		var doc = document.documentElement;
  
  		return ('requestFullscreen' in doc) ||
  		        ('msRequestFullscreen' in doc) ||
  				('mozRequestFullScreen' in doc && document.mozFullScreenEnabled) ||
  				('webkitRequestFullScreen' in doc);
  	}
  
  	function requestFullScreen(elem){
  		if (elem.requestFullscreen) {
  			elem.requestFullscreen();
  		} else if (elem.mozRequestFullScreen) {
  			elem.mozRequestFullScreen();
  		} else if (elem.webkitRequestFullScreen) {
  			elem.webkitRequestFullScreen(Element.ALLOW_KEYBOARD_INPUT);
  		} else if (elem.msRequestFullscreen) {
  			elem.msRequestFullscreen();
  		}
  	}
  
  	function fullScreenStatus(){
  		return document.fullscreen ||
  				document.mozFullScreen ||
  				document.webkitIsFullScreen ||
  				document.msFullscreenElement ||
  				false;
  	}
  
  	function cancelFullScreen(){
  		if (document.exitFullscreen) {
  			document.exitFullscreen();
  		} else if (document.mozCancelFullScreen) {
  			document.mozCancelFullScreen();
  		} else if (document.webkitCancelFullScreen) {
  			document.webkitCancelFullScreen();
  		} else if (document.msExitFullscreen) {
  			document.msExitFullscreen();
  		}
  	}
  
  	function onFullScreenEvent(callback){
  		$(document).on("fullscreenchange mozfullscreenchange webkitfullscreenchange", function(){
  			// The full screen status is automatically
  			// passed to our callback as an argument.
  			callback(fullScreenStatus());
  		});
  	}
  
  	// Adding a new test to the jQuery support object
  	$.support.fullscreen = supportFullScreen();
  
  	// Creating the plugin
  	$.fn.fullScreen = function(props){
  		if(!$.support.fullscreen || this.length !== 1) {
  			// The plugin can be called only
  			// on one element at a time
  
  			return this;
  		}
  
  		if(fullScreenStatus()){
  			// if we are already in fullscreen, exit
  			cancelFullScreen();
  			return this;
  		}
  
  		// You can potentially pas two arguments a color
  		// for the background and a callback function
  
  		var options = $.extend({
  			'background'      : '#fff',
  			'callback'        : $.noop( ),
  			'fullscreenClass' : 'fullScreen'
  		}, props),
  
  		elem = this,
  
  		// This temporary div is the element that is
  		// actually going to be enlarged in full screen
  
  		fs = $('<div>', {
  			'css' : {
  				'overflow-y' : 'auto',
  				'background' : options.background,
  				'width'      : '100%',
  				'height'     : '100%'
  			}
  		})
  			.insertBefore(elem)
  			.append(elem);
  
  		// You can use the .fullScreen class to
  		// apply styling to your element
  		elem.addClass( options.fullscreenClass );
  
  		// Inserting our element in the temporary
  		// div, after which we zoom it in fullscreen
  
  		requestFullScreen(fs.get(0));
  
  		fs.click(function(e){
  			if(e.target == this){
  				// If the black bar was clicked
  				cancelFullScreen();
  			}
  		});
  
  		elem.cancel = function(){
  			cancelFullScreen();
  			return elem;
  		};
  
  		onFullScreenEvent(function(fullScreen){
  			if(!fullScreen){
  				// We have exited full screen.
  			        // Detach event listener
  			        $(document).off( 'fullscreenchange mozfullscreenchange webkitfullscreenchange' );
  				// Remove the class and destroy
  				// the temporary div
  
  				elem.removeClass( options.fullscreenClass ).insertBefore(fs);
  				fs.remove();
  			}
  
  			// Calling the facultative user supplied callback
  			if(options.callback) {
                              options.callback(fullScreen);
                          }
  		});
  
  		return elem;
  	};
  
  	$.fn.cancelFullScreen = function( ) {
  			cancelFullScreen();
  
  			return this;
  	};
  }(jQuery));
  