regex101: JavaScript Match Workspace

Pro

\ban ASCII word boundary

usethe literal text use (case sensitive)

Negative Lookahead(?!(?:Ref|Effect|State)\b)

Non-Capturing Group(?:Ref|Effect|State)

1st AlternativeRef

Refthe literal text Ref (case sensitive)

2nd AlternativeEffect

Effectthe literal text Effect (case sensitive)

3rd AlternativeState

Statethe literal text State (case sensitive)

\ban ASCII word boundary

Character Class[A-Z]

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

Character Class[a-zA-Z]*

*matches any number of characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

\ban ASCII word boundary

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

26 tokens

Regular Expression

\buse(?!(?:Ref|Effect|State)\b)[A-Z][a-zA-Z]*\b

New

I need to search within my project, all words starting with the string "use" followed by any uppercase letter and other than these three cases:

useRef
useEffect
useState
Valid searches would be:

useExample
useTest
useWhatever
And invalid searches:

usefoo
usebar

Extraction

I need to search within my project, all words starting with the string "use" followed by any uppercase letter and other than these three cases:

useRef
useEffect
useState
Valid searches would be:

useExample
useTest
useWhatever
And invalid searches:

usefoo
usebar