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Detailed explanation of using v-if directive in elements and templates

零下一度Original: 2017-06-29 15:48:513451browse

This article mainly introduces you to the relevant information about the use of v-if instructions in elements and templates in Vue.js learning records. The article gives detailed sample codes for your reference and learning. I believe it will be of some use to you. The reference learning value, friends who need it can take a look below.

This article mainly introduces to you the relevant content about the use of v-if instructions in elements and templates of Vue.js. It is shared for your reference and learning. Let’s take a look at the detailed introduction:

The syntax is relatively simple, just enter the code directly:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
  "www.w3.org/TR/html4/loose.dtd">
<html>
<head>
 <title></title>
 <script src="cdn.bootcss.com/vue/2.2.2/vue.min.js"></script>
</head>
<body>
<p id="wangtuizhijiademo">
 <p v-if="instruction">在Vue.js中，当判断语句为true,可以显示信息，当为false时候不显示</p>
 <template v-if="show1">
  <p>我是 show1，默认是开启的（true），当你设置false我不显示！</p>
 </template>
 <template v-if="show2">
  <p>我是 show2，默认是关闭的，当你设置show2的值为true，我会被显示！</p>
 </template>
</p>

<script>
 new Vue({
  el: &#39;#wangtuizhijiademo&#39;,
  data: {
   instruction:true,
   show1: true,
   show2: false
  }
 })
</script>
</body>
</html>

true is the open state, false is the closed state.

#If you are interested, you can try changing show2: false from false to true. You can see two messages, as follows:

In Vue.js, when the judgment statement is true, the information can be displayed, and when it is false, it will not be displayed.

I am show1, which is enabled by default (true). When you set false, I will not display it!

I am show2, which is turned off by default. When you set the value of show2 to true, I will be displayed!

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