详解Vue监听数据变化原理
时间：2021-06-08 07:45:24|栏目：vue|点击： 次
本人最近在学习Vue，从网上查询了很多关于Vue监听数据变化原理，稍微整理精简一下做下分享。
浅度监听
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>浅度监听</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<script src="../js/vue1.0.js"></script>
<script src="../js/vue-resource.js"></script>
<script>
window.onload = function(){
var vm = new Vue({
el:'#box',
data:{
a:111,
b:2
}
});
vm.$watch('a',function(){
alert('发生变化了');
});
document.onclick = function(){
vm.a = 1;
}
}
</script>
</head>
<body>
<div id="box">
{{a}}
<hr>
{{b}}
</div>
</body>
</html>
深度监听
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>深度监听</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta name="apple-mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-status-bar-style" content="black">
<script src="../js/vue1.0.js"></script>
<script src="../js/vue-resource.js"></script>
<script>
window.onload = function(){
var vm = new Vue({
el:'#box',
data:{
json:{name:'abcdef',age:'16'},
b:2
}
});
vm.$watch('json',function(){
alert('发生变化了');
},{deep:true});
document.onclick = function(){
vm.json.name = "aaaaaa";
}
}
</script>
</head>
<body>
<div id="box">
{{json | json}}
<hr>
{{b}}
</div>
</body>
</html>
