What could be the reason behind the button's lack of color change with this particular code?

I'm a beginner in web development and currently practicing HTML, CSS, and Javascript. I've added a button to my html file and would like the color of the button to change when it's clicked on.

Here is my HTML code:

<button id="box" style="padding: 20px; background-color: black;"></button>

This is the Javascript I have written:

document.addEventListener('click', event => {
    if (event.target.id === 'box') {
        document.style.backgroundColor="red";
    }
})

I can't figure out why it's not working as expected.

javascripthtmlcss

Answer №1

document does not come with a style property as standard in spec-compliant browsers. If this is the issue, your developer console would likely display an error message like:

Uncaught TypeError: Cannot set properties of undefined (setting 'backgroundColor')

To resolve this, you need to be more specific about which element's background color you want to change. In the revised code example below, I have targeted document.body to access the style property:

document.addEventListener('click', event => {
    if (event.target.id === 'box') {
        document.body.style.backgroundColor="red";
    }
})
<button id="box" style="padding: 20px; background-color: black;"></button>

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