Does LABJS include a feature for executing a callback function in the event of a timeout during loading?

When using LabJS to asynchronously load scripts with a chain of dependencies, if one of the scripts breaks (due to download failure or connection timeout), it seems that the remaining scripts in the chain will not be executed. Is there a way to define a custom callback function to handle this scenario and take necessary actions if a specific script fails to load? If LabJS doesn't support this feature, are there any other asynchronous script loaders that do?

Answer №1

Take a look at this example that demonstrates how to implement setTimeout() timeouts with LABjs code. It showcases a fallback mechanism where it initially attempts to fetch jQuery from a CDN. If the timeout duration is exceeded, it switches to loading jQuery from a local file instead.

https://gist.github.com/750932

Answer №2

Based on input from getify, who is currently situated only a short distance away from me, it appears that dealing with timeouts in a general sense can be challenging due to the fact that timeouts are not clear-cut, positive events. (Regarding how the library specifically manages the dependency chain in such scenarios, I defer to the author for clarification.)

One potential approach is to implement your own monitoring system to wait for a suitable duration of time. By setting up an interval timer and monitoring for specific indicators that your script has successfully loaded onto the page, you can establish a backup plan if the script doesn't load within the expected timeframe.

Answer №3

Do you know about this code snippet? I haven't had the chance to try it out yet:

$LAB.script('jquery-from-cdn.js').wait(function(){

    if(!window.jQuery) {
        $LAB.script('local-jquery.js').wait(load_resources);
    } else {
        load_resources();
    }

});

function load_resources() {
    $LAB.script('other-js.js');
}

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