Last change
on this file since 6c1585f was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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File size:
564 bytes
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1 | var coreJsData = require('./_coreJsData');
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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 | module.exports = isMasked;
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