css : Avoid Superfluous Selectors

Sometimes your CSS declaration can be simpler, meaning if you find yourself coding the following:

• ul li { ... }
• ol li { ... }
• table tr td { ... }

They can be shorten down to just

• li { ... }
• td { ... }

Explanation:
li will only exist within ul or ol
and td will only be inside
tr and tableso there’s really not necessary to re-insert them.