极客观点
项目管理
HarmonyOS
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="../../lib/vue.js"></script>
<script>
window.onload = function () {
const app = new Vue({
el: "#app",
data: {
message: "你好啊",
movies: ['星际穿越', '大话西游', '少年派', '盗梦空间']
}
})
}
</script>
</head>
<body>
<div id="app">
<ul>
<li v-for="item in movies">{{item}}</li>
</ul>
</div>
</body>
</html>// 当我在控制台打印vue里面的data时
app.movies
undefined<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<script src="../../lib/vue.js"></script>
</head>
<body>
<div id="app">
<ul>
<li v-for="item in movies">{{item}}</li>
</ul>
</div>
<script>
const app = new Vue({
el: "#app",
data: {
message: "你好啊",
movies: ['星际穿越', '大话西游', '少年派', '盗梦空间']
}
})
</script>
</body>
</html>app.movies
(4) ["星际穿越", "大话西游", "少年派", "盗梦空间", __ob__: Observer]这俩种加载方式有什么区别吗？
第一种方式，你的app定义在匿名函数中，在全局是访问不到的，你控制台打印undefined是很神奇的，这里应该给你提示错误：
app is not defined第二种方式就是全局有个变量app，然后访问，打印出结果，这里的数据是经过vue处理过的(监听)