Encountering unexpected compilation errors in an Angular 9 project while utilizing safe null accessing and null coalescing features?

It's really strange what happened with this project. It was working perfectly fine yesterday, and I even left 'ng serve' running after finishing my work without any issues.

However, today when I tried to compile the app, I ran into problems due to TypeScript 3.7.2 features, even though I have version 3.7.3 globally and 3.8.3 locally in the Angular project. Additionally, I'm receiving a warning about async/await use in zone.js, despite not using async/await anywhere in my project yet - even though I've used it in previous Angular projects without issue.

The specific errors are:

WARNING: Zone.js does not support native async/await in ES2017.

and

Module parse failed: Unexpected token (17:38)
>             const address = !!company?.address;
>             if (company?.address) {

These errors appear consistently throughout the app. The app was generated just weeks ago using Angular CLI 9 with default tsconfig settings:

        "module": "esnext",
        "moduleResolution": "node",
        "target": "esnext",
        "lib": ["es2018", "dom"]

I believe the issue lies with how the project is being compiled rather than within the project itself. Unfortunately, I'm at a loss for where to look or what might be missing. Any help or suggestions would be greatly appreciated.

Edit:

I deleted the local project, copied it back from git, updated to Angular 10 using TypeScript 3.9.5, but encountered the same issues.

angulartypescriptangular-clizonejs

Answer №1

The "exnext" library includes functionalities that are not present in ES. You can find a list of these features at github.com/Microsoft/TypeScript/tree/master/lib. In my opinion, for regular projects, it is recommended to utilize the es20** module and target configuration. For example, set your target to "es2015" and module to "es2020" (which is the default in angular10).

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