How to use foreach in vue

v-for directive is used to iterate over an array or object and create corresponding DOM elements for each element. When iterating over an array, the syntax is v-for="item in items", where item is an alias for the current element. When traversing an object, the syntax is v-for="(value, key) in object", where key and value are the key and value respectively. The v-for directive also supports other features such as :key, v-bind, v-if, and v-else.

The v-for directive in Vue.js

What is the v-for directive?

The v-for directive is a Vue.js built-in directive that iterates over an array or object and creates corresponding DOM elements for each element.

Syntax

<template v-for="item in items">
  {/* 对于每个元素渲染的内容 */}
</template>

Among them:

<li>item: The alias of the current element, which can be used in the loop body . <li>items: Array or object to be traversed.

Iterate over an array

To iterate over an array, you can use the following syntax:

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

This will create an array for each element in the array <li> element, and use the item alias to access the value of the current element.

Traversing Objects

To iterate over an object, you can use the following syntax:

<div>
  <p v-for="(value, key) in object">{{ `${key}: ${value}` }}</p>
</div>

This will create a # for each key-value pair in the object ##

element and use the key and value aliases to access the key and value respectively.

Other features

The v-for directive also supports the following features:

<li>:key: used to specify The unique identifier of the element, which is crucial for Vue.js to optimize DOM operations. <li>v-bind: Used to bind attributes or data to DOM elements. <li>v-if: Used to render elements conditionally. <li>v-else: Used to render elements when v-if is false.

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