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