Regular Expressions 101

1st Alternative(.+)\s*(?={)

Group 1(.+)

.+any character (except for line terminators), repeated at least once

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

Positive Lookahead(?={)

{the literal { (123₁₀ / 173₈ / 7B₁₆)

2nd Alternative^[\t\s]*(.+;)

^start of line

Character Class[\t\s]*

*matches any number of characters from the set below:

\ta tab character (ASCII 9)

\sany whitespace character

Group 2(.+;)

.+any character (except for line terminators), repeated at least once

;the literal ; (59₁₀ / 73₈ / 3B₁₆)

Global pattern flags

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

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

26 tokens

Regular Expression

(.+)\s*(?={)|^[\t\s]*(.+;)

New

.grid-container {
	display: grid;
	grid-template-rows: 100px 200px;
}
div.target.dunes {
	background-color: green;
}

.grid-container {
	display: grid;
	grid-template-rows: 100px 200px;
}
div.target.dunes {
	background-color: green;
}