How does jquery query array elements

This article introduces the knowledge of "how to query array elements in jquery". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In jquery, you can query several array elements using the length attribute, which returns the number of elements in the jQuery object with the syntax of "array element object .length ()".

The operating environment of this tutorial: windows7 system, jquery1.10.0 version, Dell G3 computer.

A jquery query has several array elements

In jquery, you can directly use the length attribute to get the number of elements in an array.

Examples are as follows:

1. Create a new html file, named test.html, to explain how jquery calculates the number of array elements. Create a button button and set its id to test for the following trigger to calculate the number of array elements.

Within the js tag, the function method is executed when the page is loaded through the ready () method.

2. In the function method, get the button object through id, bind it to the click click event, and execute its function method when the button is clicked.

Within the function method, create an array and store it in the arr variable, then use the length attribute to get the number of elements in the current array, and use the alert () method to output.

Open the test.html file in the browser and click the button to view the results.

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