本文介绍了vue2.x select2 指令封装，分享给大家，具体如下：
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：
<!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="external nofollow" 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>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。
