ISBN-10 in JS

Match 10-digit ISBNs, allowing optional hyphens or spaces between groups.

Pattern

\b(?:\d[\- ]?){9}[\dXx]\b   (flags: g)

JavaScript / ECMAScript code

const re = new RegExp("\\b(?:\\d[\\- ]?){9}[\\dXx]\\b", "g");
const input = "0-306-40615-2";
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

Examples

Same pattern, other engines