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We develop a software which needs to be supported by IE11. As multiple sources state, IE11 does not support async/await:
as well as several blog-articles.
We did now write a simple Angular 5 project which uses async/await and it is working fine in IE11. Can we safely assume that Angular uses some kind of polyfill to add support for this in IE11? I cannot find any source stating that Angular adds support for it.
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As you can see, the async and await keywords are supported by a majority of up-to-date browsers. But of course, Internet Explorer does not support them.
Using Async/Await in Angular Basically, Async/Await works on top of Promise and allows you to write async code in a synchronous manner. It simplifies the code and makes the flow and logic more understandable.
Internet Explorer IE browser version 6 to 11 doesn't supports JAVASCRIPT Async functions.
As of TypeScript 2.1, the TypeScript compiler has support for compiling async/await code down to a form that works even on IE6!
So, if your tsconfig.json has the target set to ES5 or lower (which is the case by default in Angular CLI projects), TypeScript will handle this conversion for you. The only feature you'd potentially need to polyfill to be able to make use of this would be Promise.
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