time-to-botec

Benchmark sampling in different programming languages
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_isMasked.js (564B)

      1 var coreJsData = require('./_coreJsData');
      2 
      3 /** Used to detect methods masquerading as native. */
      4 var maskSrcKey = (function() {
      5   var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
      6   return uid ? ('Symbol(src)_1.' + uid) : '';
      7 }());
      8 
      9 /**
     10  * Checks if `func` has its source masked.
     11  *
     12  * @private
     13  * @param {Function} func The function to check.
     14  * @returns {boolean} Returns `true` if `func` is masked, else `false`.
     15  */
     16 function isMasked(func) {
     17   return !!maskSrcKey && (maskSrcKey in func);
     18 }
     19 
     20 module.exports = isMasked;