Regular Expressions 101

Pro

Negative Lookbehind(?<!\S)

\Sany non-whitespace character

href=the literal text href= (case sensitive)

Character Class["']

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Negative Lookahead(?!https?\b|\d)

1st Alternativehttps?\b

httpthe literal text http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

\ban ASCII word boundary

2nd Alternative\d

\da digit

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

(?<!\S)href=["'](?!https?\b|\d)

<link rel="stylesheet" th:href="@{css/fonts.css}" href="css/fonts.css" type="text/css" />

<link rel="stylesheet" th:href="@{css/fonts.css}" href="css/fonts.css" type="text/css" />