如何在DOM`data`属性中定义JSON对象？

Question

我尝试在json属性中设置一些dataset数据。

HTML看起来像<div data-switch="true" data-json="{'key1': 'value 1'}, {'key2': 'value 2'}">

data-json中的数据我用JavaScript以这种方式获取数据：

json = $("[data-json]").data("json").toString();
json = JSON.stringify(json);

无论我尝试什么，它都不会将其转换为object。它只返回string

使用toString()和stringify()

$(function() {
	json = $("[data-json]").data("json").toString();
    json = JSON.stringify(json);
    json = JSON.parse(json);
    
    console.log(json);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div data-json="{'key1': 'value 1'}, {'key2', 'value 2'}">

</div>

当我删除toString()和stringify()函数时，会出现以下错误： Uncaught SyntaxError: Unexpected token ' in JSON at position 1

没有toString()和stringify()

$(function() {
	json = $("[data-json]").data("json");
    json = JSON.parse(json);
    
    console.log(json);
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div data-json="{'key1': 'value 1'}, {'key2', 'value 2'}">

</div>

摆弄原始JavaScript和HTML

/**
 * Switch content inside Metro UI blocks
 *
 * @requires {data-switch} 		Set data-switch="true" inside the dom
 */
$(function() {
	
	/**
	 * Get all switch elements
	 */
	var switches = $("[data-switch]");
	/**
	 * Sample data for each switch element	 
	var switches_data = {
		0: {
			0: {
				image: 'https://cdn.elegantthemes.com/blog/wp-content/uploads/2016/02/rules-good-ui-design-web-project-thumbnail.png',
				content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'
			},
			1: {
				image: 'http://www.fujitsu.com/fts/Images/28618-workplace-manager580x224_tcm21-1830661.jpg',
				content: 'Aliquam interdum sit amet nibh aliquet accumsan.'
			},
			2: {
				image: 'http://cdn.moneycrashers.com/wp-content/uploads/2013/03/manager2.jpg',
				content: 'Vestibulum sed metus eu justo sagittis congue.'
			}
		},
		1: {
			0: {
				image: 'https://cdn.elegantthemes.com/blog/wp-content/uploads/2016/02/rules-good-ui-design-web-project-thumbnail.png',
				content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'
			},
			1: {
				image: 'http://www.fujitsu.com/fts/Images/28618-workplace-manager580x224_tcm21-1830661.jpg',
				content: 'Aliquam interdum sit amet nibh aliquet accumsan.'
			},
			2: {
				image: 'http://cdn.moneycrashers.com/wp-content/uploads/2013/03/manager2.jpg',
				content: 'Vestibulum sed metus eu justo sagittis congue.'
			}
		},
		2: {
			0: {
				image: 'https://cdn.elegantthemes.com/blog/wp-content/uploads/2016/02/rules-good-ui-design-web-project-thumbnail.png',
				content: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.'
			},
			1: {
				image: 'http://www.fujitsu.com/fts/Images/28618-workplace-manager580x224_tcm21-1830661.jpg',
				content: 'Aliquam interdum sit amet nibh aliquet accumsan.'
			},
			2: {
				image: 'http://cdn.moneycrashers.com/wp-content/uploads/2013/03/manager2.jpg',
				content: 'Vestibulum sed metus eu justo sagittis congue.'
			}
		}
	};
	*/
	/**
	 * Check if elements exists
	 */
	if(switches.length > 0) {
		/**
		 * Loop through objects
		 *
		 * @var c 	Object Key
		 * @var e 	Object Value
		 */
		$.each(switches, function(c, e) {
			/** 
			 * Get switches data current object
			 */
			var switches_data = $(this).data("switches");
			console.log(switches_data);
			/**
			 * Get next div
			 */
			var next = $(this).children().first()[0];
			next = $(next);
			/**
			 * Set type animation
			 */
			var animation = "flipInX";
			/**
			 * Set index where to start from
			 */
			var index = 0;
			/**
			 * Generate interval seconds, a random number so they will never be the same
			 */
			var x = Math.floor((Math.random() * 6000) + 3000);
			/**
			 * Loop through switches
			 *
			 * @var i 	Object Key
			 * @var b	Object Value
			 */
			$.each(switches_data, function(i, b) {
				/**
			 	 * Create new element for each switches
			 	 */
				var el = $("<div />").attr({class: "metro-ui-column-content animated", id: "content-column-" + i});
				/**
				 * Append el to next element, previous defined
				 */
				el.appendTo(next);
				/**
				 * Set background image for el
				 */
				el.css({
					"background": "url("+ b.image +") no-repeat",
					"background-size": "cover"
				});
				/**
				 * Append html content
				 */
				el.html( "<div class=\"metro-ui-column-html\">" + b.content + "</div>");
			});
			
			/**
			 * Set static this
			 */
			var self = $(this);
			/**
			 * Find all animated object
			 */
			var animated = $(this).find(".animated");
			/**
			 * Generate random number between 2000 and 4000, it acts as seconds for interval
			 */
			var x = Math.floor((Math.random() * 8000) + 4000);
			/**
			 * Loop through animated objects
			 *
			 * @var i	Object Key
			 * @var e	Object Value
			 */
			$.each(animated, function(i, e) {
				/**
				 * Start with the first animated object in the current loop
				 */ 
				if(i === 0) {
					/**
					 * Start with an timeout with random generated content, so no content will ever be loaded at the same time
					 */
					setTimeout(function() {
						/**
					 	 * Gets visible by setting the z-index
					 	 */
						$(e).css("z-index", 2).addClass("flipInX");
					}, x);
				}				
			});
			/**
			 * Set new index higher than first object
			 */
			var index = 3 ;
			/**
			 * Set interval function to start looping the animation
			 */
			setInterval(function() {
				/**
				 * Get next object from current object
				 */
				var next = self.find(".flipInX").next();
				/**
				 * If there is no next object reset to first object
				 */
				if(next.length === 0) {
					/**
					 * Update next to first object cause next doenst exist
					 */
					var next = self.find(".animated").first();
				}
				/**
				 * Set new index and add animation class
				 */
				next.css("z-index", index++).addClass("flipInX").siblings().removeClass("flipInX");
			}, x);
		});
	}
	
});

@import url('https://fonts.googleapis.com/css?family=Roboto:400,700');
body {
  background-color: #f1f1f1;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
}
* {
  box-sizing: border-box;
}
/* Metro theme UI */
.metro-theme-ui {
  max-width: 450px;
  margin: 40px auto;
  height: 250px;
}
.metro-ui-row {
  position: relative;
  width: 100%;
  min-height: 1px;
  /* Fix breaking when height is 0 */
}
.metro-ui-row:after,
.metro-ui-row:before {
  display: table;
  content: " ";
  clear: both;
}
.metro-ui-column {
  position: relative;
  background: #12A7CC;
  padding: 50px;
  box-shadow: 1px 1px 2px #ccc;
  overflow: hidden;
}
.metro-ui-column.fadeIn {
  animation: fadeIn .33s ease;
}
.metro-ui-column.fadeOut {
  animation: fadeOut .33s ease;
}
.metro-ui-column .metro-ui-column-content {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
}
.metro-ui-column .metro-ui-column-html {
  background: rgba(0, 0, 0, 0.5);
  position: absolute;
  color: #fff;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  padding: 10px;
}
/* Calculate column width */
.metro-ui-col {
  padding: 2px;
  float: left;
}
.metro-ui-col-10 {
  width: calc(100%);
}
.metro-ui-col-9 {
  width: calc(11.11111111%);
}
.metro-ui-col-8 {
  width: calc(12.5%);
}
.metro-ui-col-7 {
  width: calc(14.28571429%);
}
.metro-ui-col-6 {
  width: calc(16.66666667%);
}
.metro-ui-col-5 {
  width: calc(20%);
}
.metro-ui-col-4 {
  width: calc(25%);
}
.metro-ui-col-3 {
  width: calc(33.33333333%);
}
.metro-ui-col-2 {
  width: calc(50%);
}
.metro-ui-col-1 {
  width: calc(100%);
}
/* Keyframes */
.animated {
  -webkit-animation-duration: 1s;
  animation-duration: 1s;
  -webkit-animation-fill-mode: both;
  animation-fill-mode: both;
}
.animated.infinite {
  -webkit-animation-iteration-count: infinite;
  animation-iteration-count: infinite;
}
.animated.hinge {
  -webkit-animation-duration: 2s;
  animation-duration: 2s;
}
.animated.flipOutX,
.animated.flipOutY,
.animated.bounceIn,
.animated.bounceOut {
  -webkit-animation-duration: .75s;
  animation-duration: .75s;
}
@keyframes flipInX {
  from {
    left: -100%;
  }
  to {
    left: 0;
  }
}
.metro-ui-column .metro-ui-column-content.flipInX {
  -webkit-animation-name: flipInX;
  animation-name: flipInX;
  -webkit-backface-visibility: visible !important;
  backface-visibility: visible !important;
}
@keyframes flipOutX {
  from {
    -webkit-transform: perspective(400px);
    transform: perspective(400px);
  }
  30% {
    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 0deg);
    transform: perspective(400px) rotate3d(1, 0, 0, 0deg);
    opacity: 1;
  }
  to {
    -webkit-transform: perspective(400px) rotate3d(1, 0, 0, 90deg);
    transform: perspective(400px) rotate3d(1, 0, 0, 90deg);
    opacity: 0;
  }
}
.flipOutX {
  -webkit-animation-name: flipOutX;
  animation-name: flipOutX;
  -webkit-backface-visibility: visible !important;
  backface-visibility: visible !important;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="metro-theme-ui">
	<div class="metro-ui-row">
		<div class="metro-ui-col metro-ui-col-10">
			<div class="metro-ui-column"></div>
		</div>
	</div>
	<div class="metro-ui-row">
		<div class="metro-ui-col metro-ui-col-3" data-switch="true" data-switches='{"image": "https://cdn.elegantthemes.com/blog/wp-content/uploads/2016/02/rules-good-ui-design-web-project-thumbnail.png", "content": "Lorem ipsum dolor sit amet, consectetur adipiscing elit."}, { "image": "http://www.fujitsu.com/fts/Images/28618-workplace-manager580x224_tcm21-1830661.jpg", "content": "Aliquam interdum sit amet nibh aliquet accumsan."}, { "image": "http://cdn.moneycrashers.com/wp-content/uploads/2013/03/manager2.jpg", "content": "Vestibulum sed metus eu justo sagittis congue." }'">
			<div class="metro-ui-column"></div>
		</div>
		<div class="metro-ui-col metro-ui-col-3">
			<div class="metro-ui-column"></div>
		</div>
		<div class="metro-ui-col metro-ui-col-3">
			<div class="metro-ui-column"></div>
		</div>
	</div>
	<div class="metro-ui-row">
		<div class="metro-ui-col metro-ui-col-3">
			<div class="metro-ui-column"></div>
		</div>
		<div class="metro-ui-col metro-ui-col-3">
			<div class="metro-ui-column"></div>
		</div>
		<div class="metro-ui-col metro-ui-col-3">
			<div class="metro-ui-column"></div>
		</div>
	</div>
</div>