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20 lines
564 B
20 lines
564 B
var coreJsData = require('./_coreJsData'); |
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/** Used to detect methods masquerading as native. */ |
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var maskSrcKey = (function() { |
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var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || ''); |
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return uid ? ('Symbol(src)_1.' + uid) : ''; |
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}()); |
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/** |
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* Checks if `func` has its source masked. |
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* |
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* @private |
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* @param {Function} func The function to check. |
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* @returns {boolean} Returns `true` if `func` is masked, else `false`. |
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*/ |
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function isMasked(func) { |
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return !!maskSrcKey && (maskSrcKey in func); |
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} |
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module.exports = isMasked;
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