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Javascript in, instanceof and typeof Operators

There are some really handy special operators in Javascript that we're going to discuss in this codecast:

  • in operator to find whether an object property exists in the object or not. It can also be used to find whether an array element exists or not by the element index.

  • instanceof operator to check whether an object's prototype chain has a particular Constructor's prototype property or not.

  • typeof operator to get the type of the operand (object, string literal, number literal, etc.) as a string.

Related:


    Warning: Invalid argument supplied for foreach() in /var/www/cssdeck/app/modules/labs/views/_details.php on line 68
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    Javascript in, instanceof and typeof Operators

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