Last change
on this file since 6a80231 was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago |
initial commit
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100644
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File size:
1.1 KB
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[6a3a178] | 1 | var Symbol = require('./_Symbol');
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| 2 |
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| 3 | /** Used for built-in method references. */
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| 4 | var objectProto = Object.prototype;
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| 5 |
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| 6 | /** Used to check objects for own properties. */
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| 7 | var hasOwnProperty = objectProto.hasOwnProperty;
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| 8 |
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| 9 | /**
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| 10 | * Used to resolve the
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| 11 | * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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| 12 | * of values.
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| 13 | */
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| 14 | var nativeObjectToString = objectProto.toString;
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| 15 |
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| 16 | /** Built-in value references. */
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| 17 | var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
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| 18 |
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| 19 | /**
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| 20 | * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
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| 21 | *
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| 22 | * @private
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| 23 | * @param {*} value The value to query.
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| 24 | * @returns {string} Returns the raw `toStringTag`.
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| 25 | */
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| 26 | function getRawTag(value) {
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| 27 | var isOwn = hasOwnProperty.call(value, symToStringTag),
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| 28 | tag = value[symToStringTag];
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| 29 |
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| 30 | try {
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| 31 | value[symToStringTag] = undefined;
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| 32 | var unmasked = true;
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| 33 | } catch (e) {}
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| 34 |
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| 35 | var result = nativeObjectToString.call(value);
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| 36 | if (unmasked) {
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| 37 | if (isOwn) {
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| 38 | value[symToStringTag] = tag;
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| 39 | } else {
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| 40 | delete value[symToStringTag];
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| 41 | }
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| 42 | }
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| 43 | return result;
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| 44 | }
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| 45 |
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| 46 | module.exports = getRawTag;
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