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Today, I would like to share with you the relevant knowledge of what the push method in JavaScript is useful. the content is detailed and the logic is clear. I believe most people still know too much about this knowledge, so share this article for your reference. I hope you can get something after reading this article.

In JavaScript, the push () method is used to add one or more elements to the end of the array and returns the length of the array after the element is added; the syntax format "array.push (element 1, element 2,..., element X)", the method must have at least one parameter.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

JavaScript push () method

The push () method adds the elements specified by the parameter to the end of the array in turn and returns the length of the array after the element is added (the method must have at least one parameter).

Syntax format:

The array.push (item1, item2,..., itemX) parameter describes that item1, item2,..., itemX is required. The element to add to the array.

Return value: new length of array

Examples are as follows:

Var arr = [1JEI 2jue 3]; console.log (arr.push (4)); / / return the length of the final array: 4console.log (arr); / / return: 1Lore 2, 3pm 4console.log (arr.push); / / return the length of the final array: 7console.log (arr); / / return: 1meme, 2pm, 3pm, 4pm, 5pm, 6p7.

Output:

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