Text Processingflags: gm

Trailing Whitespace (Per Line)

Match trailing spaces and tabs at the end of each line — the regex linters use to flag dirty whitespace.

Try it in RegexPro →

Available in

JSSupported

JavaScript / ECMAScript

Browser-native RegExp. Default if you don't pick.

PYSupported

Python (re)

CPython stdlib `re`. Unicode-aware `\w` and `\d` by default.

GOSupported

Go (RE2)

Linear-time matching. No backreferences or lookarounds.

Pattern

regexengine-agnostic
[ \t]+$   (flags: gm)

Raw source: [ \t]+$

How it works

[ \t]+ matches one or more space or tab characters. $ with the m (multiline) flag anchors to the end of EACH line, not the whole string. The g flag iterates so a multi-line string surfaces every offending line. Pair with `replace(re, '')` to strip.

Examples

Input

good line\nbad line \nfine

Matches

Input

tab here\tand more\t\t

Matches

  • \t\t

Input

no trailing space

No match

—

Common use cases

  • •Linter / formatter rules (eslint, prettier, gofmt)
  • •Pre-commit hooks for cleanup
  • •Markdown source hygiene
  • •Git diff noise reduction

Related patterns

Whitespace Trim (Leading & Trailing)

Text Processing

Match leading and/or trailing whitespace on a string — the regex equivalent of .trim().

Whitespace-Only Line

Text Processing

Matches lines containing only whitespace (or empty lines).

Single-Line Comment (// or #)

Text Processing

Match single-line comments using either the `//` (C-family) or `#` (shell, Python, Ruby, YAML) marker.

Emoji (Unicode)

Text Processing

Match emoji characters across the main Unicode emoji ranges — requires the Unicode flag in JavaScript.

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