jQuery keyup() Method (original) (raw)

Last Updated : 11 Jul, 2025

The **jQuery **keyup() is an inbuilt method that is used to trigger the keyup event whenever the User releases a key from the keyboard. So, Using keyup() method we can detect if any key is released from the keyboard.

**Syntax:

$(selector).keyup(function)

Here selector is the selected element.

**Parameters: It accepts an optional parameter as a function which gives the idea whether any key is pressed or not.

**jQuery examples to show the working of keyup() Method:
**Example 1: Below code is used to check if a keyboard key is released after being pressed.

HTML `

<script>
    $(document).keyup(function (event) {

        alert('You released a key');
    });
</script>

Press and release a key from the keyboard

`

**Output:

**Example 2: Below code is used to change background color of the page whenever a key is released from the keyboard

HTML `

<script>
    let colors = ['red', 'blue', 'green', 'grey',
        'black', 'white', 'teal', 'yellow'];
    let i = 0;
    $(document).keyup(function (event) {

        $('body').css('background-color', colors[i]);
        i++;
        i = i % 9;

    });
</script>

Press any key from the keyboard and then release it
to change the background color of the page

`

**Output: