How to use push function for vue

The push() function in Vue is used to add new elements to an array, modify the original array and return a new length. Usage method: define the array, use the push() function to add elements, and the new element will be added to the end of the array. Example: const arr = ['a', 'b', 'c']; arr.push('d'); Returns the new array: ["a", "b", "c", "d"].

Use of push() function in Vue

In Vue.js, the push() function is used to add new elements to an array. It modifies the original array and returns the new length.

grammar:

 <code class="js">arr.push(item1, item2, ..., itemN);</code>

parameter:

• item1, item2, ..., itemN: The element to be added to the end of the array.

How to use:

The following steps demonstrate how to use the push() function:

1. Define an array:

 <code class="js">const arr = ['a', 'b', 'c'];</code>

2. Use the push() function to add elements:

 <code class="js">arr.push('d'); // 添加元素"d"</code>

3. New array:

The arr array now contains elements ["a", "b", "c", "d"].

Example:

 <code class="js">const todos = ['吃饭', '睡觉']; // 添加新任务"打代码" todos.push('打代码'); console.log(todos); // 输出：['吃饭', '睡觉', '打代码']</code>

Notice:

• The push() function modifies the original array.
• If you want to create a copy of the array, you can use the slice() or concat() function.

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