原创  干货:vue2.x select2 指令封装

分类: 2017-02-26T22:23:34    3141人阅读   

其他的就不说了,说说封装过程的问题吧

1、vue不同版本指令接受参数不一样

2、酱油君对于vue2.x双向绑定的机制不了解(有大神路过望在评论中不吝赐教

上代码:

点击这里看源码及运行效果(请在电脑端打开)

<!DOCTYPE html>
<html>
<head>
	<title>vue select2 封装</title>
	<link href="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/css/select2.min.css" rel="stylesheet" />
	<script src="https://unpkg.com/vue/dist/vue.js"></script>
	<script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.js"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.3/js/select2.min.js"></script>
	<style type="text/css">
		.content{
			text-align: center;
			padding:50px;
		}
		.content *{
			text-align: left;
		}
		.select{
			width: 350px;
		}
	</style>
</head>
<body>
	<div class="content" id="vue-example">
		<select class="select" v-select2='options' v-model="selectValue"></select>
		<br/>
		<span>结果:{{ selectValue }}</span>
	</div>
</body>
<script type="text/javascript">
	Vue.directive('select2', {
	  inserted: function (el, binding, vnode) {
		 let options = binding.value || {};

		$(el).select2(options).on("select2:select", (e) => {
		  // v-model looks for
		  //  - an event named "change"
		  //  - a value with property path "$event.target.value"
	    	  el.dispatchEvent(new Event('change', { target: e.target })); //说好的双向绑定,竟然不安套路
		});
	  },
	  update: function(el, binding, vnode) {
	    $(el).trigger("change");
	  }
	});

	var vueApp = new Vue({
	  el: "#vue-example",
	  data: {
	    selectValue: '你还没有选值',
	    options: {
	    	data: [
	    	        { id: 0, text: 'enhancement' }, 
		        { id: 1, text: 'bug' }, 
		        { id: 2, text: 'duplicate' }, 
		        { id: 3, text: 'invalid' }, 
		        { id: 4, text: 'wontfix' }
	    	]
	    }
	  }
	});
</script>
</html>


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