Vue：指令

v-bind示例 <div id="app-2"> <span v-bind:title="message"> 鼠标悬停几秒钟查看此处动态绑定的提示信息！ </span> </div> <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> <script> var app2 = new Vue

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