How to use map in vue

In Vue.js, the map method creates a new array, and each element is the result of the original array element being processed by a specific function. Here are the steps: Create an array. Call the map method, passing a function as argument. In the function, each array element is processed and the result is returned.

map usage in Vue.js

map method in Vue.js To create a new array, each element is the result of the original array elements processed by a function.

Syntax

<code class="js">map(callbackFn(currentValue, index, array))</code>

Parameters

• ##callbackFn(currentValue, index, array) : A function that receives the following parameters:

  • currentValue: The original array element currently being processed.
  • index: The index of the current element in the original array.
  • array: Original array.

Return value

A new array in which each element is processed by

callbackFn result.

Usage

To use the

map method, follow these steps:

Create an array.
1. Call the
2. map method and pass a function as a parameter.
In the function, process each array element and return the result.

Example

The following example adds 1 to an array of numbers and generates a new array:

<code class="js">const numbers = [1, 2, 3, 4, 5];
const incrementedNumbers = numbers.map((num) => num + 1);

console.log(incrementedNumbers); // 输出： [2, 3, 4, 5, 6]</code>

Note

• map method will not modify the original array. It creates a new array containing the processed elements.
• map The callback function in the method must return a value.
• map method returns a new array with the same length as the original array.

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