Vue.js Loop Statements

Loops use the v-for directive.

The v-for directive requires a special syntax in the form of site in sites, where sites is the source data array and site is the alias for the array element being iterated.

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: 'tutorialpro' },
      { name: 'Google' },
      { name: 'Taobao' }
    ]
  }
})
</script>

Using v-for in a template:

v-for

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

v-for Iterating Over Objects

v-for can iterate over an object's properties:

v-for

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

<script>
new Vue({
  el: '#app',
  data: {
    object: {
      name: 'tutorialpro.org',
      url: 'http://www.tutorialpro.org',
      slogan: 'Learning is not just about technology, it's about dreams!'
    }
  }
})
</script>

You can also provide a second parameter for the key:

v-for

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

A third parameter for the index:

v-for

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

v-for Iterating Over Integers

v-for can also loop over integers:

v-for

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