16 lines
565 B
JavaScript
16 lines
565 B
JavaScript
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// getting tag from 19.1.3.6 Object.prototype.toString()
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var cof = require('./$.cof')
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, TAG = require('./$.wks')('toStringTag')
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// ES3 wrong here
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, ARG = cof(function(){ return arguments; }()) == 'Arguments';
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module.exports = function(it){
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var O, T, B;
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return it === undefined ? 'Undefined' : it === null ? 'Null'
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// @@toStringTag case
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: typeof (T = (O = Object(it))[TAG]) == 'string' ? T
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// builtinTag case
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: ARG ? cof(O)
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// ES3 arguments fallback
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: (B = cof(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : B;
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};
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