CSS box model and why we use box-border

Question

Accepted Answer

CSS box model defines the design and layout of elements on a webpage. Box-border is used to include padding and border in the total width and height of an element.

CSS box model includes content, padding, border, and margin of an element
By default, padding and border are not included in the total width and height of an element
Using box-border property includes padding and border in the total width and height of an element
Example: div { box-sizing: border-box; }

Accepted Answer

CSS Box Model:
The CSS box model is a container that contains multiple properties including borders, margin, padding, and the content itself. 
Why we use border box:
It tells the browser that the values specified for an element's width and height will include content, padding, and borders.

CSS box model and why we use box-border

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