I'm trying to understand a code where the min-height of the body element is set to 100vh after previously defining the height of the html element as 100%. Why is there a need for this specific sequence?
body {
position: relative;
overflow: hidden;
min-height: 100vh;
}
It seems redundant to first set the html and body elements' heights to 100% and then specifically define the min-height as 100%. Wouldn't it be simpler to just use min-height: 100% for the body element from the start?
When it comes to assigning properties to HTML or body elements, there is a crucial hierarchy that must be understood:
Viewport > HTML > Body
Take note of the distinctions between viewport, HTML, and body as illustrated below.
height: 100vh equals 100% of the viewport height
height: 100% translates to 100% of the parent element's height
Viewport units are relative measurements, meaning they are not fixed but vary according to the dimensions of the viewport.
Viewport Height (vh) equates to 1/100th of the viewport's height.
On the other hand, when an element's size is specified in percentage, it depends on its parent element. For an element to occupy the entire screen height, its parent element must also span the full height of the screen.
This is why it becomes necessary to include height: 100% for both HTML and body elements since they lack a predefined size, with the viewport acting as the parent for the HTML element.
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