vue1中，el属性可以是标签，id，如：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>test</title>
</head>
<body>
<div id="app"></div>
<script src="vue.min.js"></script>
</body>
</html>
new Veu({
el:"html"
});
目的是接收html内部所有的标签
然而2.0却只能用id,并且body内部的id
new Veu({
el:"#app"
});
是我姿势不对，还是2.0改变了绑定方式？
网友回答：
chenhao_ch 2016-10-27 5:24 回复:
已被采纳
Vue 2.0 中源码如下：src/entries/web-runtime-with-compiler.js
el = el && query(el)
/* istanbul ignore if */
if (el === document.body || el === document.documentElement) {
process.env.NODE_ENV !== 'production' && warn(
Do not mount Vue to <html> or <body> - mount to normal elements instead.
)
return this
}
query方法来着src/platforms/web/util/index.js
源码如下：
/**
* Query an element selector if it's not an element already.
*/
export function query (el: string | Element): Element {
if (typeof el === 'string') {
const selector = el
el = document.querySelector(el)
if (!el) {
process.env.NODE_ENV !== 'production' && warn(
'Cannot find element: ' + selector
)
return document.createElement('div')
}
}
return el
}也就是说，Vue2.0在业务里面对HTML，body标签做了限制。
caryhgq 2016-10-27 4:59 回复:不推荐，也不能这样干（下面来自官网）
The provided element merely serves as a mounting point. Unlike in Vue 1.x, the mounted >element will be replaced with Vue-generated DOM in all cases. It is therefore not >recommended to mount the root instance to <html> or <body>.