What does push mean in js

In JavaScript, the push() method is used to add elements to the end of an array and return the modified array length. Specifically: modify the original array and add new elements to the end. Receives any number of new elements as arguments. Returns the new array length, containing the number of newly added elements. Supports nested arrays, adding other arrays as single elements. No error will be reported because the array is full, but the array size will be dynamically expanded.

The meaning of push in JS

In JavaScript, the push() method is used to operate arrays. Its main purpose is to Function is to add one or more new elements to the end of the array. It modifies an existing array and returns the length of the modified array.

Usage

The basic syntax of the push() method is as follows:

<code class="javascript">array.push(element1, element2, ..., elementN);</code>

Among them:

• array: The array to which new elements are to be added.
• element1, element2, ..., elementN: The new element to be added to the end of the array.

Return value

push() method modifies the existing array and returns the length of the modified array. This length includes the number of newly added elements.

Example

<code class="javascript">const myArray = ['apple', 'banana', 'cherry'];

// 添加一个新元素
myArray.push('grape');

// 添加多个新元素
myArray.push('orange', 'kiwi');

console.log(myArray); // 输出：['apple', 'banana', 'cherry', 'grape', 'orange', 'kiwi']</code>

Other notes

• The parameters of the push() method can be any type of value , including arrays, objects, functions, etc.
• If some elements in the array are other arrays, the push() method will nest these arrays instead of adding them to the end as single elements.
• If the array is full, the push() method does not throw an error, but adds new elements to the end of the array and expands the size of the array.

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