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javascriptjquerytypeerror

Uncaught TypeError: matchExpr[type].exec is not a function

After modified Object.prototype, all of jQuery's methods running on selectors started resulting in the below error:

Uncaught TypeError: matchExpr[type].exec is not a function

And also when I call $.post(). it says that

$.post() is not undefined

What I did was:

Object.prototype.extend = function(object) {
      ...
   }

What am I missing here?

Solution

  • Rule #1: Avoid Monkey Patching at all costs!

    Overriding methods of built-in Objects (via the prototype property, as in your example) is a major anti-pattern and it's considered a really, really bad practice!

    You just need to think of another way to accomplish what you are trying to achieve, without overriding these methods.

    You might want to take a look at jQuery's extend method for example.

    Reference

    Why is extending native objects a bad practice