How do I get async functions working in Ionic 2's typescript?

Question

When I make a new Ionic --v2 project and use an async function declaration, ionic build browser fails with:

db.ts:15:16: Async functions are only available when targeting ECMAScript 2015 or higher.

I would have thought that changing tsconfig.json's target to es6 would fix the problem, but it did not. What can I do to resolve this so that I can use async/await in my Ionic projects?

On further investigation, looks like ionic 2 locks in es5 as the target to prevent errors in Angular. Until Typescript 2.1 comes out, seems like async / await are off the table (react-etc.net/entry/…). — Walt W
– Walt W, Commented Oct 13, 2016 at 22:21

misha130 · Accepted Answer · 2017-01-31 18:11:45Z

1

Es6 works if you choose your module to be es2015 and not commonjs.

This will of course hinder your support of some mobile devices because not all of them support es6 especially safari so you'll have to babel your code which will add a hefty weight on it.

If you wish you could remain at es5 and specify typescript 2.1 in your package.json. This will prevent you from using aot or prod configuration sadly but otherwise it works.

With angular v4 coming out hopefully someone will update app scripts to support 2.1.

answered Jan 31, 2017 at 18:11

misha130

5,7862 gold badges31 silver badges55 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Efren Over a year ago

Is this still the case?

misha130 Over a year ago

You wont encounter said problem anymore. Later versions enabled smooth usage

Collectives™ on Stack Overflow

How do I get async functions working in Ionic 2's typescript?

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related