| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 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; |