Let\'s say, for example, I\'m creating a game. I have a small script whose job is to load all the assets and present a progress bar to the user while the assets load.
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You might like to have a look at How to show loading status in percentage for ajax response?
It is to see the status of an AJAX download. Since you are loading a script, it might not be the best way to get the file but it could work. You would then need to put the content received by the ajax call somewhere to execute, and eval is not recommended.