初始化

康凯

2022-05-20 aa4c235a8ca67ea8b731f90c951a465e92c0a865

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var classof = require('../internals/classof');
var Iterators = require('../internals/iterators');
var wellKnownSymbol = require('../internals/well-known-symbol');
 
var ITERATOR = wellKnownSymbol('iterator');
 
module.exports = function (it) {
  if (it != undefined) return it[ITERATOR]
    || it['@@iterator']
    || Iterators[classof(it)];
};