JavaScript / ECMAScript

Markdown Heading in JS

Matches markdown ATX-style headings (# through ######).

Try it in the JS tester →

Pattern

regexJS
^(#{1,6})\s+(.+)$   (flags: gm)

JavaScript / ECMAScript code

jsJavaScript
const re = new RegExp("^(#{1,6})\\s+(.+)$", "gm");
const input = "# Title\n## Subtitle\n### Section";
const matches = [...input.matchAll(re)];
console.log(matches.map(m => m[0]));

Uses `String.prototype.matchAll` for global iteration (Node 12+ / all modern browsers).

How the pattern works

`^(#{1,6})` captures 1–6 hash characters at line start. `\s+` requires whitespace. `(.+)$` captures the heading text to end of line.

Examples

Input

# Title ## Subtitle ### Section

Matches

  • # Title
  • ## Subtitle
  • ### Section

Input

####### Not a heading

No match

—

Same pattern, other engines

Python (re)

Supported

See how this pattern looks (and behaves) in Python's stdlib `re` module.

Go (RE2)

Supported

See how this pattern looks (and behaves) in Go's `regexp` package (RE2 engine).

← Back to Markdown Heading overview (all engines)