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maxi326

Does $variableName means global variable?

in Getting Started • 13 years ago

I saw someone use this kind of syntax in an open source plugin.

#varableName = someMethod();

that someMethod return an object instance.

Then I can access that object outside that plugin.

Is this a standard javascript global variable or some jQuery feature?

Replies(4)

eric_hynds

Re: Does $variableName means global variable?

13 years ago

$variablename is just a naming convention to signify that the variable is a jQuery object. No special functionality is given to variables prepended by a dollar sign. The reason you can access $variablename outside the plugin is because either the a) the plugin returns that object to $variablename , b) the variable was later set into the window scope, or c) the variable was defined outside the plugin.

maxi326

Re: Re: Does $variableName means global variable?

13 years ago

May I ask how do you set a variable into the window scope?

relst.jqu..

Re: Does $variableName means global variable?

13 years ago

The scope of the variable does not depend on his name. It depends on the place where you declare your variable.
It's a good practice to use the prefix $ when the variable contains a jQuery object.