What is the default box-sizing value for HTML elements?

Q: What is the default box-sizing value for HTML elements?

The default `box-sizing` value for HTML elements is `content-box`. This means that the width and height of an element only include the content area, and any padding or border is added outside of that, increasing the element's total size. div { width: 200px; height: 100px; padding: 20px; border: 5px solid black; box-sizing: content-box; /* Default value */ } /* Total element width = 200px + 2*20px padding + 2*5px border = 250px */ Width and height only include the content area. Padding and border are added outside the content dimensions. Can lead to larger total element size than specified width/height. Alternative is `box-sizing: border-box` which includes padding and border in width/height.

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box-sizing, CSS defaults, layout

Default Box-Sizing in CSS

The default box-sizing value for HTML elements is content-box. This means that the width and height of an element only include the content area, and any padding or border is added outside of that, increasing the element's total size.

Example of Default Box-Sizing

Key Points About Content-Box

1
Width and height only include the content area.
2
Padding and border are added outside the content dimensions.
3
Can lead to larger total element size than specified width/height.
4
Alternative is box-sizing: border-box which includes padding and border in width/height.

Scenario Questions

0-2 years experience

Follow-up Questions