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