• https://harald.ist.org/paste/promise_all_3.html
  • 1<!DOCTYPE html><html lang="en" tabindex="0"><head><meta charset="UTF-8"><script>
  • 2
  • 3const VERBOSE = true;
  • 4
  • 5
  • 6async function getResult (number) {
  • 7 console.log( "\t\t"+"START getResult:", number );
  • 8
  • 9 return new Promise( (done)=>{
  • 10 setTimeout( ()=>{
  • 11 console.log( "\t\t"+"DONE getResult:", number );
  • 12 done( "#" + String( number ) );
  • 13 });
  • 14 });
  • 15}
  • 16
  • 17
  • 18async function newItem (number) {
  • 19 var resultA, resultB;
  • 20
  • 21 console.log( "\t"+"START newItem:", number );
  • 22 console.log( "\t"+"ResultA:", resultA = await getResult( "A"+number ) );
  • 23 console.log( "\t"+"ResultB:", resultB = await getResult( "B"+number ) );
  • 24 console.log( "\t"+"RETURN newItem:", number );
  • 25
  • 26 console.log( "Awaiting timeout" );
  • 27 await new Promise( (done)=>setTimeout( done, 1000 ) );
  • 28 console.log( "After timout" );
  • 29
  • 30 return {
  • 31 data: resultA + "|" + resultB,
  • 32 };
  • 33}
  • 34
  • 35
  • 36addEventListener( "load", async ()=>{
  • 37 var item1, item2;
  • 38
  • 39 console.log( "START" );
  • 40 console.log( "item1", item1 = await newItem( 1 ) );
  • 41 console.log( "item2", item2 = await newItem( 2 ) );
  • 42 console.log( "END" );
  • 43});
  • 44</script>
  • 45</body></html>

    • Every program ends, but not all of them halt.