In vuejs, the function of el is to specify the mounting target of the Vue instance, and will provide a DOM element that already exists on the page as the mounting target of the Vue instance; after the instance is mounted, the element can Use "vm.$el" to access.
The operating environment of this tutorial: windows7 system, vue2.9.6 version, DELL G3 computer.
In the vue official API document, el has the following description:
https://cn.vuejs.org/v2/api/#el
# Everyone knows the role of
If there is a render function or template attribute, the mounted element will be replaced by the DOM generated by Vue; otherwise, the HTML where the mounted element is located will be extracted and used Make a template
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<div id="ppp"></div>
</body>
</html>new Vue({
el: '#ppp',
router,
store,
render: h => h(App)
})
new Vue({
el: '#ppp',
router,
components: { App },
template: '<App/>'
})
new Vue({
router,
store,
}).$mount('#ppp')
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