Angular 7 doesn't find pipes

问题

I'm trying to build my Angular 7 project but every time I get an error saying

ERROR in : Template parse errors: The pipe 'currency' could not be found....

But when I try to run the ng serve it does works as expected

I've tried to build it with the --prod flag, and it doesn't work. If I remove the production flag, it build correctly.

回答1:

Try this: in tsconfig.json change

"angularCompilerOptions": {
    "enableIvy": true
}

for

"angularCompilerOptions": {
    "enableIvy": false
}

回答2:

In order to use pipes, you first need add pipe to your module declarations:

import {CurrencyPipeComponent}  from './currencypipe.component';

@NgModule({
  imports:      ...,
  declarations: [
                 ...,
                 CurrencyPipeComponent],
})
export class YourModuleWhichYourComponentIsRegistered { } 

来源：https://stackoverflow.com/questions/53503724/angular-7-doesnt-find-pipes