How to use jQuery focus()

Usage of jQuery focus(): First, when the page is loaded through the [ready()] method, obtain the input object through the id and bind the focus focus event to it; then when the input gains focus, execute the function method; finally, the input content is obtained through the [val()] method.

The operating environment of this tutorial: windows7 system, jquery3.2.1 version, Dell G3 computer.

Usage of jQuery focus():

1. Create a new html file, named test.html, to explain focus()# in jquery ##What does the method do?

2. In the test.html file, use the input tag to create a text box and set its default value to 123456.

3. In the test.html file, add an id attribute to the input tag and set it to mytest.

4. In the js tag, when the page loading is completed through the ready() method, obtain the input object through the id and bind the focus event to it. When the input When focus is obtained, the function method is executed.

5. In the function method, obtain the input content through the

val() method, and use the alert() method to output .

#6. Open the test.html file in the browser to check the effect.

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