Regular Expressions 101

^start of line

Group 1((?!known-to-fail|env_browser).)*

*repeats the group contents below any number of times:

Negative Lookahead(?!known-to-fail|env_browser)

1st Alternativeknown-to-fail

known-to-failthe literal text known-to-fail (case sensitive)

2nd Alternativeenv_browser

env_browserthe literal text env_browser (case sensitive)

.any Unicode character (except for line terminators)

$end of line

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.

25 tokens

Regular Expression

^((?!known-to-fail|env_browser).)*$

New

["known-to-fail", "env_ci", "env_local"]
["non-exclusive", "env_browser", "env_local"]
["env_ci"]
["env_ci", "env_local", "known-to-fail"]
["env_ci", "env_local"]
[]
""

Regular Expression

Substitution