instanceof.js 232 Bytes
Newer Older
Kriengkrai Yothee's avatar
Kriengkrai Yothee committed
1 2 3 4 5 6 7
export default function _instanceof(left, right) {
  if (right != null && typeof Symbol !== "undefined" && right[Symbol.hasInstance]) {
    return !!right[Symbol.hasInstance](left);
  } else {
    return left instanceof right;
  }
}