无法在另一个js文件中获取全局变量

Question

I currently have this global variable declared in javascript.js which I've imported to my main document.

var globalURL = "test URL";

When I try an alert within the javascript.js file it successfully outputs the value of globalURL.

However when I try to an alert with my current document but calling globalURL I get an error

Uncaught ReferenceError: globalURL is not defined 

I'm I doing something wrong here? I followed the example here but still it doesn't work for me. Can I access variables from another file?

UPDATE: I have included my javascript.js file with my current document, so I don't think the error is there. Otherwise the first alert function within the javascript.js wouldn't have run at all.

Answer 1

在HTML文件中，您可能先加载使用globalURL的文件，然后再加载设置globalURL的文件。

Answer 2

Open your browser's developer section and there scripts tabs. Observe that both js files are loaded into memory. I believe one of them is not loaded. Global valiarbles in js are available in combined space.

Answer 3

Another possibility is that you might be declaring it from inside of a function somewhere. If you want to declare a global variable from inside a function, try leaving off the var at the beginning. This would look like globalURL = "test URL";