Regular Expressions 101

Pro

background:the literal text background: (case sensitive)

\s*any whitespace character, repeated any number of times

#the literal # (35₁₀ / 43₈ / 23₁₆)

Character Class[a-fA-F0-9]*

*matches any number of characters from the set below:

a-fone character from a (97₁₀) to f (102₁₀) (case sensitive)

A-Fone character from A (65₁₀) to F (70₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

25 tokens

background:\s*#[a-fA-F0-9]*;

New

.foo {
  background:#ffffgg;
}

.bar {
  background:     #BADA55;
}

.baz {
  background: #fff;
}

.foo {
  background:#ffffgg;
}

.bar {
  background:     #BADA55;
}

.baz {
  background: #fff;
}