CODEWITHSUNDEEP
javascriptjqueryglobal-variables
Pinkie
Pinkie

Reputation: 10256

JavaScript jQuery Variables i should avoid using that conflicts with Global variables

What are JavaScript/jQuery variable names i should avoid creating that could conflict with already existing Global variables. Yesterday i discovered that i cannot use the variable default. It must be a global variable.

Upvotes: 2

Views: 1391

Answers (7)

Christof Coetzee
Christof Coetzee

Reputation: 57

when building jQuery plugins, be aware that $.fn.init = function() could lead to problems and you should rather use another name for your function. http://www.sarahleeashraf.com/explaining-jquery-part-2-init-function

Upvotes: 1

Hristo
Hristo

Reputation: 46517

These are JavaScript's reserved words:

  • abstract
  • boolean, break, byte
  • case, catch, char, class, const, continue
  • debugger, default, delete, do, double
  • else, enum, export, extends
  • false, final, finally, float, for, function
  • goto
  • if, implements, import, in, instanceof, int, interface
  • long
  • native, new, null
  • package, private, protected, public
  • return
  • short, static, super, switch, synchronized
  • this, throw, throws, transient, true, try, typeof
  • var, volatile, void
  • while, with

You should avoid naming you variables the same as that list.

I hope this helps.
Hristo

Upvotes: 2

bruno.zambiazi
bruno.zambiazi

Reputation: 1482

Take a look at:

http://jqfundamentals.com/book/index.html

There's a special content of reserved words.

Upvotes: 1

lonesomeday
lonesomeday

Reputation: 237965

default is not a global variable: it is a reserved word (it's used in switch statements).

You can find a list of reserved keywords on the MDC website.

Note also that there are various other names that you should be careful with. For instance, a variable named location could conflict with the window.location object unless you're careful. For this reason (among others), you should avoid global variables.

Other such variables are:

  • window.top
  • window.parent
  • window.document
  • window.self
  • and quite a few more.

Upvotes: 4

Demian Brecht
Demian Brecht

Reputation: 21378

default is a JavaScript keyword:

switch(foo)
{
    case a:
        break;
    default:
        break;
}

As for jQuery reserved words, check out this link (scroll down to the "Reserved Words" section)

Upvotes: 2

Jason McCreary
Jason McCreary

Reputation: 73011

default is not a global variable, it's a reserved word in JavaScript.

If you are going to use global variables, you should namespace them.

Upvotes: 1

Daff
Daff

Reputation: 44215

default is one of the JavaScript reserved words (which is also the list of variables to avoid using). jQuery wise it is $ although you can use jQuery in no conflict mode.

Upvotes: 3

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