.config/coc/extensions/node_modules/coc-prettier/node_modules/core-js/modules/es.string.starts-with.js

   1 'use strict';
   2 var $ = require('../internals/export');
   3 var getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;
   4 var toLength = require('../internals/to-length');
   5 var notARegExp = require('../internals/not-a-regexp');
   6 var requireObjectCoercible = require('../internals/require-object-coercible');
   7 var correctIsRegExpLogic = require('../internals/correct-is-regexp-logic');
   8 var IS_PURE = require('../internals/is-pure');
   9
  10 var nativeStartsWith = ''.startsWith;
  11 var min = Math.min;
  12
  13 var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');
  14 // https://github.com/zloirock/core-js/pull/702
  15 var MDN_POLYFILL_BUG = !IS_PURE && !CORRECT_IS_REGEXP_LOGIC && !!function () {
  16   var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');
  17   return descriptor && !descriptor.writable;
  18 }();
  19
  20 // `String.prototype.startsWith` method
  21 // https://tc39.es/ecma262/#sec-string.prototype.startswith
  22 $({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
  23   startsWith: function startsWith(searchString /* , position = 0 */) {
  24     var that = String(requireObjectCoercible(this));
  25     notARegExp(searchString);
  26     var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));
  27     var search = String(searchString);
  28     return nativeStartsWith
  29       ? nativeStartsWith.call(that, search, index)
  30       : that.slice(index, index + search.length) === search;
  31   }
  32 });