How to interrupt promise all in a good practice

I'm implementing big file upload task. I would split a big file into hundreds promises tasks.

Promise.all([100_subtasks]).then(DO_SOMETHING)

However, Let's say there's a subtask failed or a user wants to abort the entire process manually.

How do I do?

My idea is that every subtask will do a special check on a flag.

    subTask(){
        // before do a upload
        if (cancelFlag === true){
            abort the following upload process
        }

    }

    userClicksCancel(){
        // turn the flag to true
        cancelFlag = true ;
    }

Thanks a lot!