vue 方法会每次重新计算， computed会复用结果，见图调用次数
效果
源码
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| <html>
<header>
<title>Vue.JS</title>
<link rel="stylesheet" href="style.css">
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
</header>
<body>
<div id="box">
<p>方法：{{getName}}</p>
<p>计算属性：{{getNameMethods()}}</p>
<h1>-----------------</h1>
<p>方法：{{getName}}</p>
<p>计算属性：{{getNameMethods()}}</p>
</div>
</body>
<script>
var vm = new Vue({
el: "#box",
data: {
x: 1
},
methods: {
getNameMethods() {
console.log("Methods")
return '123'
}
},
computed: {
getName() {
console.log('computed')
return '123'
}
}
})
</script>
</html>
|
