I ran
ng version
and got the following output:
Angular CLI: 9.0.3
Node: 12.16.1
OS: win32 x64
Angular: 9.0.2
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router
Ivy Workspace: Yes
Package Version
-----------------------------------------------------------
@angular-devkit/architect 0.803.25
@angular-devkit/build-angular 0.803.25
@angular-devkit/build-optimizer 0.803.25
@angular-devkit/build-webpack 0.803.25
@angular-devkit/core 8.3.25
@angular-devkit/schematics 9.0.3
@angular/cdk 8.2.3
@angular/cli 9.0.3
@angular/material 8.2.3
@ngtools/webpack 8.3.25
@schematics/angular 9.0.3
@schematics/update 0.900.3
rxjs 6.5.4
typescript 3.8.2
webpack 4.39.2
If I try set the type script lower it complains the project is Angular 9 and can't use that type of type script. Not sure what to do, any help welcomed, thanks.
Use the version which set ng update command: npm install typescript@3.7.5
This means that Angular doesn't support TypeScript 3.8.x yet.
You can bypass this error with angularCompilerOptions.disableTypeScriptVersionCheck: true option in
tsconfig.json
"angularCompilerOptions": {
...
"disableTypeScriptVersionCheck": true,
},
See also:
I had the same issue. I noticed my package-lock.json has typescript : 3.8.3. So I did npm i typescript@3.7.5 and build my app and it worked.