Summarize some knowledge points of vue3: Vue.js loop statement

Vue.js loop statement

Loop using the v-for directive.

The v-for directive requires   special syntax in the form site in sites , where sites is the source data array and site is an alias for iteration over the array elements.

v-for can bind data to an array to render a list:

v-for directive

<div id="app">
  <ol>
    <li v-for="site in sites">
      {
   
   { site.name }}
    </li>
  </ol>
</div>
 
<script>
new Vue({
  el: '#app',
  data: {
    sites: [
      { name: 'Runoob' },
      { name: 'Google' },
      { name: 'Taobao' }
    ]
  }
})
</script>

Use v-for in the template:

v-for

<ul>
  <template v-for="site in sites">
    <li>{
   
   { site.name }}</li>
    <li>--------------</li>
  </template>
</ul>

v-for iterate object

v-for can iterate data through the properties of an object:

v-for

<div id="app">
  <ul>
    <li v-for="value in object">
    {
   
   { value }}
    </li>
  </ul>
</div>
 
<script>
new Vue({
  el: '#app',
  data: {
    object: {
      name: '菜鸟教程',
      url: 'http://www.kxdang.com/topic/',
      slogan: '学的不仅是技术,更是梦想!'
    }
  }
})
</script>

You can also provide the second parameter as the key name:

v-for

<div id="app">
  <ul>
    <li v-for="(value, key) in object">
    {
   
   { key }} : {
   
   { value }}
    </li>
  </ul>
</div>

The third parameter is the index:

v-for

<div id="app">
  <ul>
    <li v-for="(value, key, index) in object">
     {
   
   { index }}. {
   
   { key }} : {
   
   { value }}
    </li>
  </ul>
</div>

v-for iterate over integers

v-for can also loop integers

v-for

<div id="app">
  <ul>
    <li v-for="n in 10">
     {
   
   { n }}
    </li>
  </ul>
</div>

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Origin blog.csdn.net/weixin_72651014/article/details/131460832