Support ESM @angular/compiler-cli linker and @angular/service-worker usage
#21793
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…er-cli` linker usage This is a followup PR for angular#21771 that addresses partial compilation linker usage. With the Angular CLI currently being a CommonJS package, this change uses a dynamic import to load `@angular/compiler-cli/linker[/babel]` which may be ESM. CommonJS code can load ESM code via a dynamic import. Unfortunately, TypeScript will currently, unconditionally downlevel dynamic import into a require call. require calls cannot load ESM code and will result in a runtime error. To workaround this, a Function constructor is used to prevent TypeScript from changing the dynamic import. Once TypeScript provides support for keeping the dynamic import this workaround can be dropped and replaced with a standard dynamic import.
…-worker usage With the Angular CLI currently being a CommonJS package, this change uses a dynamic import to load `@angular/service-worker/config` which may be ESM. CommonJS code can load ESM code via a dynamic import. Unfortunately, TypeScript will currently, unconditionally downlevel dynamic import into a require call. require calls cannot load ESM code and will result in a runtime error. To workaround this, a Function constructor is used to prevent TypeScript from changing the dynamic import. Once TypeScript provides support for keeping the dynamic import this workaround can be dropped and replaced with a standard dynamic import.
alan-agius4
approved these changes
Sep 23, 2021
devversion
approved these changes
Sep 23, 2021
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This is a followup PR for #21771 that addresses partial compilation linker and service worker usage.
With the Angular CLI currently being a CommonJS package, this change uses a dynamic import to load
@angular/compiler-cli/linker[/babel]and@angular/service-workerwhich may be ESM. CommonJS code can load ESM code via a dynamic import. Unfortunately, TypeScript will currently, unconditionally downlevel dynamic import into a require call. require calls cannot load ESM code and will result in a runtime error. To workaround this, a Function constructor is used to prevent TypeScript from changing the dynamic import. Once TypeScript provides support for keeping the dynamic import this workaround can be dropped and replaced with a standard dynamic import.