How to set global variables in Javascript/HTML5 in Windows8 store app

Question

I want to use global variable in .js files. For example,

when I read a file content in \" a.js + a.html \" and saved into a certain variable \'fileContent\'

Answer 1

Given that the architecture for Windows 8 Applications is the single page model, where you don't navigate the browser, but merely load a fragment of HTML and insert it into the current document, this is very easy. I would, however, recommend using some typing, rather than just a "naked" global variable.

File A (globals.js):

WinJS.Namespace.define("MyGlobals",  {
    variableA: null,
});

Include this at the top of default.html after the WinJS includes.

File B (b.js):

// your other code
...
MyGlobals.variableA = getValueFromSomewhere();

File C (b.html, or c.js):

// your other code
...
printSomethingAwesomeFromData(MyGlobals.variableA);