using Typescript callback style error handling

getData(someParameter, function(err: Error | null, resultA: ResultA) {
  if(err !== null) {
    // do something like calling the given callback function and pass the error
    getMoreData(resultA, function(err: Error | null, resultB: ResultB) {
      if(err !== null) {
        // do something like calling the given callback function and pass the error
        getMoreData(resultB, function(resultC: ResultC) {
          getMoreData(resultC, function(err: Error | null, d: ResultD) {
            if(err !== null) {
              // you get the idea?
            }
          })
        });
      }
    });
  }
});

Có thể bạn đã miss một số snippets code

Kiểm tra định dạng email bằng Javascript

using Typescript callback style error handling

try/catch es10

An update for developer convience allows the use of try/catch without an explicit e Error reference in the catch call.

kiểm tra email trong javascript

How to reverse an Array?

Reversing an array in JS is really simple with the standard array method. Like below