JavaScript Demo: RegExp.prototype[@@replace]

class RegExp1 extends RegExp {
  [Symbol.replace](str) {
    return RegExp.prototype[Symbol.replace].call(this, str, '#!@?');
  }
}

console.log('football'.replace(new RegExp1('foo')));
// expected output: "#!@?tball"

JavaScript Demo: RegExp.prototype[@@replace]

​x
class RegExp1 extends RegExp {
  [Symbol.replace](str) {
    return RegExp.prototype[Symbol.replace].call(this, str, '#!@?');
  }
}
​
console.log('football'.replace(new RegExp1('foo')));
// expected output: "#!@?tball"
​