4.4侧边栏

linwenling

2023-04-04 e3bc460e60710e04f05888c7dc5dd819dcb84be1

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var nativeFunctionToString = require('./_function-to-string');
var WeakMap = require('./_global').WeakMap;
 
module.exports = typeof WeakMap === 'function' && /native code/.test(nativeFunctionToString.call(WeakMap));