How do I handle errors with promises?

Question

As a node programmer. I\'m used to use \"nodebacks\" for handling errors in my code:

myFn(param, function(err, data) {
    if (err){
        //error handling         


        

Answer 1

If you're using the async/await syntax, you can just use the regular try-catch syntax for error handling.

// your promise function
const myFn = function(param){
  return new Promise(function(resolve, reject){
      if (someLogic()) {
          resolve(someValue);
      } else {
          reject('failure reason');
      }
  });
}

// Define the parent function as an async function
async function outerFn(param) {
    try {
        // Wait for the promise to complete using await
        const result = await myFn(param)
        // business logic with result
    } catch (e) {
        //error handling logic
    }
}