<!DOCTYPE html>
<html lang="en"> <head>
<meta charset="UTF-8">
<title>自定义指令：directive</title>
<script src="vue.js"></script>
</head>
<body>
<!--
directive:
bind inserted:插入的 update
-->
<div id="demo">
<h3 v-star="color">标题部分</h3>
<input type="text" v-model="color" v-focus>
<h1 v-hide="true">{{title}}</h1>
</div>
<script>
new Vue({
el: "#demo",
data: {
title: "百度一下就知道",
color: "red"
},
directives: {
star(el, bind) {
var color = bind.value ? bind.value : 'red';
el.style.cssText = "color:" + color;
},
focus: {
inserted(el, bind) {
el.focus();
}
},
hide(el,bind){
if(bind.value){
el.style.cssText="display:none";
}
}
}
});
</script> </body> </html>