Friday 10 August 2018

async/await in node.js: error handling

So, let's have a quick look at async await error handling!

Like last time we are wrapping our code in a self-executing function so we can use the async keywords.

To handle errors in async functions we use a try-catch block like we normally would in synchronous code. You can see from the example that a rejected promise comes out of our catch block.

As we know from previous posts a promise will be rejected if reject() is called or an error is thrown inside of the promise.

Also if you throw an error in an async function this results in a rejected promise. So you can see now how it all fits together, any promise rejections or errors thrown result in the catch block being used.

Just worthy to note that non-awaited rejected promises will not trigger the catch block but will put up an unhandled promise rejection error.


  1. After logging in on the site, find a way to|you possibly can} view the promotions obtainable for the present week. Spin Casino has a month-to-month calendar of promotional offers masking match bonuses, bet365 free spins, and other rewards. You’ll additionally get access to the Spin Casino Bonus Wheel, where find a way to|you possibly can} win further spins, bonus credits, and loyalty factors every four hours. As if over 500 video games weren't sufficient, Spin Casino additionally has a Spin Vegas section.