TS1086: An accessor cannot be declared in an ambient context

Question

When running with Angular, I\'m getting thje error TS1086: An accessor cannot be declared in an ambient context. for Javascript getters and setters in this Abstract

Answer 1

This isn't an Angular error.

TypeScript 3.7 introduced a breaking change for getters and setters in the type definition files.

As mentioned above, TypeScript 3.7 emits get/set accessors in .d.ts files which can cause breaking changes for consumers on older versions of TypeScript like 3.5 and prior. TypeScript 3.6 users will not be impacted, since that version was future-proofed for this feature.

https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-7.html#class-field-mitigations

You should be using TypeScript 3.6 or higher if you're going to consume type definitions generated with 3.7 or higher.