47 lines
1.1 KiB
JavaScript
47 lines
1.1 KiB
JavaScript
var Symbol = require('./_Symbol');
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/** Used for built-in method references. */
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var objectProto = Object.prototype;
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/** Used to check objects for own properties. */
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var hasOwnProperty = objectProto.hasOwnProperty;
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/**
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* Used to resolve the
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* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
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* of values.
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*/
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var nativeObjectToString = objectProto.toString;
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/** Built-in value references. */
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var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
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/**
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* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
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*
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* @private
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* @param {*} value The value to query.
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* @returns {string} Returns the raw `toStringTag`.
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*/
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function getRawTag(value) {
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var isOwn = hasOwnProperty.call(value, symToStringTag),
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tag = value[symToStringTag];
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try {
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value[symToStringTag] = undefined;
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var unmasked = true;
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} catch (e) {}
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var result = nativeObjectToString.call(value);
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if (unmasked) {
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if (isOwn) {
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value[symToStringTag] = tag;
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} else {
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delete value[symToStringTag];
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}
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}
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return result;
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}
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module.exports = getRawTag;
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