only-changed-jest-watch-plugin/example/node_modules/core-js/modules/_fails-is-regexp.js

Jest watch plugin for running either only the modified test (for TDD), or tests of dependant modules

var MATCH = require('./_wks')('match');
module.exports = function (KEY) {
  var re = /./;
  try {
    '/./'[KEY](re);
  } catch (e) {
    try {
      re[MATCH] = false;
      return !'/./'[KEY](re);
    } catch (f) { /* empty */ }
  } return true;
};