手动引导增加禁引可视域判断

‘liusuyi’

2023-10-28 7786c1a71400a8e1635d2d6c94161a0474c4bb67

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/* eslint-disable es/no-symbol -- required for testing */
var NATIVE_SYMBOL = require('../internals/symbol-constructor-detection');
 
module.exports = NATIVE_SYMBOL
  && !Symbol.sham
  && typeof Symbol.iterator == 'symbol';