How to loop through arrays for vue function

The functions that traverse arrays in Vue are: v-for: used to traverse arrays and create elements in the DOM. Array.prototype.forEach(): Used to iterate through an array and perform custom operations.

Functions that traverse arrays in Vue

Vue.js provides two main functions to iterate through arrays: v-for and Array.prototype.forEach().

v-for

v-for directive is used to iterate through an array in the DOM and create templates for its elements. The syntax is as follows:

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

This creates a list of items where each item is displayed as a <li> element. Each element in the items array will be repeated in the DOM to create the corresponding <li> element.

Array.prototype.forEach()

Array.prototype.forEach() method is a way to perform traversal operations on JavaScript native array types. The syntax is as follows:

 <code>items.forEach(function(item) { // 操作项});</code>

This method will pass a callback function that will perform operations on each element in the array. The callback function receives the current element in the array as its first parameter.

Use scenarios

<li> Use v-for to render elements of an array in the DOM. <li> Use Array.prototype.forEach() to iterate through the array and perform custom operations, such as modifying or filtering elements.

Selection factors

<li> If you need to display arrays in the DOM, use v-for . <li> If you only need to perform custom operations on array elements, use Array.prototype.forEach() .

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