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Checking Type of Object

/ Published in: JavaScript
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'typeof' and 'instanceof' isn't a reliable method to find out the object class, so this is a function that does this in a more trustable way.

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  1. function is(type, obj) {
  2.     var clas = Object.prototype.toString.call(obj).slice(8, -1);
  3.     return obj !== undefined && obj !== null && clas === type;
  4. }
  5.  
  6. is('String', 'test'); // true
  7. is('String', new String('test')); // true

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