typescript - how can we make sure all the promises gets resolved before running next cycle of loop

Question

how can we make sure if there are multiple promises(like 5-10) inside a loop running 100 times, how can we make sure all the promises gets resolved before running next cycle of loop.

lets say i am running a loop

length of items array = 100;

for(i in items)
{
  if(i=0)
  {
     await getData1();
  }
  if(i=1)
  {
     const a = await getData2();
     const b = await getData3(a);
  }
}

if for the first time = 1, it is running. How can i make sure that before running for i=2, it should resolve all the promises for i=1. And shouldn't accumulate unresolved promises.

question from:https://stackoverflow.com/questions/65926953/how-can-we-make-sure-all-the-promises-gets-resolved-before-running-next-cycle-of

Answer 1

you can use async module, check the documentation

let async = require('async');
async.eachSeries(items, async(item)=>{
       await getData1();
       const a = await getData2();
       const b = await getData3(a);

},()=>{
    console.log("finish")
})