How to use v-for to render a list in Vue

Vue is a popular JavaScript framework for building user interfaces. When you need to render a list or array in Vue, you can use the v-for directive. The v-for directive is the core tool for looping and rendering lists in Vue. It can be used to traverse the properties of an array or object and render a template for each item of data.

The usage of the v-for directive is very simple. You only need to add the v-for instruction to the elements that need to be traversed, and then add the variable name to be looped to achieve loop rendering, for example:

<ul>
  <li v-for="item in items">{{ item }}</li>
</ul>

In this example, use v-for The instruction traverses the items array, generates a list of li tags, and displays each item of data in the array in each li tag.

In addition to traversing the array, the v-for instruction can also be used to traverse the properties of the object. For example:

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

This code will output all the properties of the object object and add the property name and attribute The value is displayed in the li tag.

When using the v-for instruction, you can also control the behavior of the loop by adding additional parameters, such as:

<ul>
  <li v-for="(item, index) in items">{{ index }}:{{ item }}</li>
</ul>

In this example, an additional parameter index is added for Outputs the index value of the loop.

The v-for directive can also be used together with the v-if directive to filter and render based on conditions. For example:

<ul>
  <li v-for="item in items" v-if="item !== 'apple'">{{ item }}</li>
</ul>

In this example, the li element will be rendered only when item is not equal to 'apple'.

In general, the v-for instruction is a very practical function in Vue, which can help us easily loop through the rendering list and achieve the effect of dynamically displaying data. Proficient in the usage of the v-for instruction can allow us to develop Vue applications more efficiently.

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