Nodejs api with Promisses

Question

I am developing an API in Typescript with Nodejs and Mariadb; when I do an operation with the bank, below I have a if to check if an error has occurred.

productDao.save({name:"Notebook Dell", price:"5000"}, function(err, res){
   if(err){
      //Código para caso algo dê errado.
   }else{
      //Código se tudo der certo.
   }
})

The case is: I can use Promises on an API? Would you like it to look like this:

productDao.save({name:"Notebook Dell", price:"5000"})
.then(res => {
   //Caso tudo dê certo.
})
.catch(err => {
   //Caso algo dê errado.
})

But I wonder, The standard Promise is ideal for an API? What are the possible complications? What would be the disadvantages and advantages over this architecture in a API?

Answer 1

You can use "old-fashioned" Promises or Callbacks as you like. The Promise approach has advantages:

• errors launched within a Precedent call the catch and do not stop the script, unlike a normal function that stops execution when errors occur
• a Promise allows chaining and to be included in high-order functions such as the Promise.all

Regarding API, it is a matter of preference.