Height 100%¡ªNot Working
Example
By WEBHEK
The CSS height
property can be frustrating to use, because, especially if you are setting heights as a percentage of the browser window, they don't always work.
For example, this page you are on currently has a height set to this main content div
of 100%, but as you can see, it is not filling up the entire page. Instead it is filling up only the amount of space that this text takes up.
Return to the FAQ: How do you set the height of an element to 100%? to learn how to get your elements to fill up the full height of a browser window.