jQuery: NewBie Questions, how to call function from another class in jquery?
I have function getCartItems
in cart.js and I want t开发者_开发技巧o call that function in another class checkout.js than how can I do this ?
You need to include the script file cart.js
in your page before you include checkout.js
. Assuming the function getCartItems
is declared in the global namespace, that's all you have to do.
However, don't confuse a Javascipt source file for a class. Javascript does not have classes in that sense.
I hate to throw a more complicated answer in here but one thing you can do to help simplify things is to use pseudo namespaces. Here is an example:
// In cart.js
var CartNS = {};
CartNS.getCartItems = function(){
function text here...
}
// In checkout.js
CartNS.getCartItems();
By organizing things into namespaces it can make it easier to deal with scope issues (one of the most difficult concepts in JavaScript) and it makes it a little easier to find things as well. This is also a way to simulate Classes in JavaScript. A decent example to get you started is: 3 ways to define a JavaScript class
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