has-working-bind-x/dist/has-working-bind-x.esm.js

Indicates if the engine has a working bind function.

import noop from 'noop-x';
var bind = noop.bind;

var test1 = function test1() {
  var a1 = null;
  var a2 = null;
  var context = null;
  var testThis = [];

  var test1Fn = function test1Fn(arg1, arg2) {
    /* eslint-disable-next-line babel/no-invalid-this */
    context = this;
    a1 = arg1;
    a2 = arg2;
    /* eslint-disable-next-line prefer-rest-params */

    return arguments;
  };

  try {
    var boundFn = bind.apply(test1Fn, [testThis, 1]);
    var args = boundFn(2);
    return boundFn.length === 1 && args.length === 2 && a1 === 1 && a2 === 2 && context === testThis;
  } catch (e) {
    return false;
  }
};

var test2 = function test2() {
  var a1 = null;
  var a2 = null;
  var context = null;
  var oracle = [1, 2, 3];

  var Ctr = function Ctr(arg1, arg2) {
    a1 = arg1;
    a2 = arg2;
    context = this;
    return oracle;
  };

  try {
    var BoundFn = bind.apply(Ctr, [null]);
    var returned = new BoundFn(1, 2);
    return BoundFn.length === Ctr.length && returned === oracle && a1 === 1 && a2 === 2 && context !== oracle;
  } catch (e) {
    return false;
  }
};
/**
 * Indicates if the engine has a working bind function.
 *
 * @type {boolean}
 */


var isWorking = typeof bind === 'function' && test1() && test2();
export default isWorking;

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