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

map(callbackFn(currentValue, index, array))

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:

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

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

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.

The above is the detailed content of How to use map in vue. For more information, please follow other related articles on the PHP Chinese website!