`RegExp.prototype.source`

The text of the regular expression pattern, without delimiters or flags.

Syntax

regexp.source

string — The pattern source string.

const re = /ab+c/gi;
console.log(re.source);

Output

ab+c

const re = new RegExp("\\d+");
console.log(re.source);

Output

\d+

console.log(new RegExp("").source);

Output

(?:)

- A read-only accessor; it excludes the slashes and flags. - An empty pattern reports as `(?:)` so it remains a valid literal.