CSS box-sizing property is used to denote how a browser should calculate the height and width of an element.
CSS box-sizing property is used mainly to contain elements within an container perfectly.
CSS box-sizing have following values,
- content-box : When it is used padding and border are set to the outside box. While width and height are set to the elements.
- border-box : When it is used width, height and padding are added to the elements content. The border is added to the outside box.