Example of After : Before css

refer below example

My name is Donald
I live in Ducksburg
2>My name is Donald2>
2>I live in Ducksburg2>
Note: For this selector to work in IE8, a DOCTYPE must be declared, and you must use the old, single-colon CSS2 syntax (:before instead of ::before).

refer also below useful sites:

https://www.w3schools.com/cssref/sel_before.asp

https://developer.mozilla.org/en-US/docs/Web/CSS/::after

http://nicolasgallagher.com/css-image-replacement-with-pseudo-elements/

https://css-tricks.com/almanac/selectors/a/after-and-before/