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_baseGetTag.js
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_baseGetTag.js
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define(['./_Symbol', './_getRawTag', './_objectToString'], function(Symbol, getRawTag, objectToString) {
/** Used as a safe reference for `undefined` in pre-ES5 environments. */
var undefined;
/** `Object#toString` result references. */
var nullTag = '[object Null]',
undefinedTag = '[object Undefined]';
/** Built-in value references. */
var symToStringTag = Symbol ? Symbol.toStringTag : undefined;
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
value = Object(value);
return (symToStringTag && symToStringTag in value)
? getRawTag(value)
: objectToString(value);
}
return baseGetTag;
});