I am currently going through a website's banner via chrome developer tools(Inspect). I noticed that a particular banner has the following ruleset in its CSS:
banner{
background-position:bottom;
background-position-x: center;
background-position-y: center;
}
Is this just a formality?. Because, when I removed the three background properties and set background-position: center, the banner wasn't affected in any way.
From a developer wannabe. Thanks
That banner just has bad CSS.
background-position is a shorthand for, background-position-x and background-position-y.
So,
banner {
background-position: bottom;
background-position-x: center; /* This is not doing anything, because x became 'center' when it was omitted above. */
background-position-y: center; /* This will override the previously set 'bottom' */
}
As you mentioned, background-position: center does the same job, since both x and y will be 'center'.
There's nothing wrong with using keywords, but if you're just starting with CSS, I strongly recommend you to get used to using percentages.
(You'll thank me later when you need more specific positioning using calc().
background: 0% 100% = background: left bottom
background: 100% 0% = background: right top
background: 50% 50% = background: center center
Source: https://developer.mozilla.org/en-US/docs/Web/CSS/background-position