JavaScript / ECMAScript

Credit Card Number in JS

Match 16-digit credit card numbers with optional spaces or hyphens between groups of 4.

Try it in the JS tester →

Pattern

regexJS
\b(?:\d{4}[\s\-]?){3}\d{4}\b   (flags: g)

JavaScript / ECMAScript code

jsJavaScript
const re = new RegExp("\\b(?:\\d{4}[\\s\\-]?){3}\\d{4}\\b", "g");
const input = "4111 1111 1111 1111";
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

Three groups of 4 digits with optional space/hyphen separators, followed by a final 4-digit group. Word boundaries prevent partial matches.

Examples

Input

4111 1111 1111 1111

Matches

  • 4111 1111 1111 1111

Input

4111-1111-1111-1111

Matches

  • 4111-1111-1111-1111

Input

4111111111111111

Matches

  • 4111111111111111

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 Credit Card Number overview (all engines)