What is background-size and background-scale property?

The background-size property is used to stretch and scale the background image. This property set the size of the background image. Here we will see all possible examples of background-size and background-scale properties. Syntax: cover: This property value is used to stretch the background-image in x and y directions and cover the whole area.

How do I set a background size in CSS?

If you only provide one value (e.g. background-size: 400px) it counts for the width, and the height is set to auto. You can use any CSS size units you like, including pixels, percentages, ems, viewport units, etc. If you provide two values, the first sets the background image’s width and the second sets the height.

How do background images respond to resizing and scaling?

Background images can also respond to resizing and scaling. Here we will show three different methods: 1. If the background-size property is set to "contain", the background image will scale, and try to fit the content area. However, the image will keep its aspect ratio (the proportional relationship between the image's width and height):