Abort computation?

[javierluraschi]

Obviously, JavaScript does not support aborting ongoing computations unless they run outside the main thread, say worker role, etc.

However, would it be possible to implement a hook to abort computation when possible? I can try to send a PR if this might be possible and get a code pointer.

For instance, tensorflow.js's fit() function supports this: https://stackoverflow.com/questions/57660245/is-there-a-way-to-abort-a-call-to-model-fit

await model.fit(x, y, {
    callbacks: {
        onBatchEnd: (batch, logs) => { // stop after batch
            if (/* ... */) {
                model.stopTraining = true;
            }
        },
        onEpochEnd: (epoch, logs) => { // stop after epoch
            if (/* ... */) {
                model.stopTraining = true;
            }
        },
    },
});