javascript - Pass variables between different .js files; one is inside an iframe

Question

I have 2 .js files in the html document like this:

    <script type="text/javascript" src="js/1.js"></script>
    <script type="text/javascript" src="js/2.js"></script>

That document also have an iframe. I have 2 .js in the iframe aswell:

    <script type="text/javascript" src="js/2.js"></script>
    <script type="text/javascript" src="js/3.js"></script>

So 2.js is in both documents. My plan was to make that to connect them. I can not put 3.js in both documents because it will mess up stuff.

1.js got a variable. I want to use that variable in 3.js. But i can't figure out how to pass a variable from 1.js to 3.js. Is this even possible?

*The variable is declared in 1.js.

Answer 1

You can not "pass" variables through file references. You would need to add code to pass data from the parent frame to the iframe.

If the variable is global it is

//from the iframe
var theVariable = window.parent.yourVaraibleName;

//from the parent
var theVariable = document.getElementById("iframeId").contentWindow.yourVaraibleName;