(Glowscript) Turning asynchronous jQuery function into synchronous function

[KC]

I have downloaded Glowscript Offline 3.2 zip file, and I manipulated some of the code in order to load a python file without user input (user no need to write the code). 

Here is my attempt:

var text 

    function getHeader(exporting, fileExp) {

        // var text = GSedit.getValue()

        $.get("./Demos/" + fileExp, function (r) {

            text = r;

        })

However, it does not work because Javascript execute the code asynchronously. While the $.get is reading the python file, Javascript directly execute the other functions without waiting. Therefore, it makes variable text undefined. I have to click "run" button twice to run the code. Is there any method to solve this technical problem?

[Bruce Sherwood]

I don't immediately see a solution, but why not simply have the user click "Choose File"? The user doesn't have to write any code.

Bruce

[KC]

Because I want the user can select the sample without choosing the file. 

[Bruce Sherwood]

Why not just provide links to the programs stored at webvpython.org (=glowscript.org)? That's simpler than asking students to get the offline Web VPython and your files.  At any rate, I don't have any useful answers to your question.

Bruce

[KC]

Alright, that makes sense too. Thank you very much!