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What is the use of vuejs el?

青灯夜游Original: 2021-09-18 17:58:433308browse

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

##el, which is used to specify the mounting target of the Vue instance. We focus on the two red exclamation mark parts above. To summarize:

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>

Example 1: Replace the DOM rendered by the render function0b56aebb5df5b06b70a352c6e82d051d94b3e26ee717c64999d7867364b1b4a3

new Vue({
  el: &#39;#ppp&#39;,
  router,
  store, 
  render: h => h(App)
})

Example 2: String template replacement0b56aebb5df5b06b70a352c6e82d051d94b3e26ee717c64999d7867364b1b4a3

new Vue({
  el: &#39;#ppp&#39;,
  router,
  components: { App },
  template: &#39;<App/>&#39;
})

Example 3: Manual mounting and render does not exist Functions and template attributes

new Vue({
  router,
  store,
}).$mount(&#39;#ppp&#39;)

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vue.js Tutorial"

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