Tips for utilizing functions in an inline HTML translation pipe

Question

Tips for utilizing functions in an inline HTML translation pipe

My objective is to streamline the code by using the Angular translate pipe. Currently, I find myself using 8 curly brackets and repeating the word "translate" twice... there must be a more efficient approach.

Here is my current code setup:

<span
  *ngIf="checkoutForm.get('email')?.errors?.['email']">
  {{ 'eMail' | translate }} {{ lowerCaseFirstLetter('isInvalid' | translate) }}
</span>

I am attempting to condense it to something like:

<span
  *ngIf="checkoutForm.get('email')?.errors?.['email']" 
  translate>eMail {{ lowerCaseFirstLetter('isInvalid' | translate) }}
</span>

or even simpler:

<span
  *ngIf="checkoutForm.get('email')?.errors?.['email']"
   translate>eMail lowerCaseFirstLetter('isInvalid')
</span>

The Text

Email is translated as = E-Mail
IsInvalid is translated as = Is invalid
lowerCaseFirstLetter() is a function that only lowers the first letter, which is crucial to maintain orthography in other languages

angular typescript angular-translate ngx-translate

Answer 1

Answer №1

If you want to enhance your Angular app by creating a custom pipe with an additional parameter, here's how you can achieve that:

<span
    *ngIf="checkoutForm.get('email')?.errors?.['email']"> 
    {{ 'eMail' | error:'isInvalid' }}
</span>

To implement this feature, you'll need to create a new file named error.pipe.ts with the following code snippet:

import { Pipe, PipeTransform } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';

@Pipe({
          name: 'error'
})

export class ErrorPipe implements PipeTransform {
          constructor(private translateService: TranslateService) {
          }
          transform(value: string, arg: string): string {
                    return `${this.translateService.instant(value)} ${this.translateService.instant(arg).toLowerCase()}`;
          }
}

After creating the pipe file, remember to declare it in the component module such as in this example example.module.ts:

import { NgModule } from '@angular/core';  // standard
import { CommonModule } from '@common/angular';  // standard
import { ErrorPipe } from './path/to/error.pipe';

@NgModule({
  imports: [CommonModule, ExampleRoutingModule], // standard
  declarations: [ExampleComponent, ErrorPipe]
})
export class ExampleModule {}

Once everything is set up, you can utilize this custom pipe within your component like so:

<span
    *ngIf="checkoutForm.get('email')?.errors?.['email']"> 
    {{ 'eMail' | error:'isInvalid' }}
</span>

Answer 2

If you want to enhance your Angular app by creating a custom pipe with an additional parameter, here's how you can achieve that:

<span
    *ngIf="checkoutForm.get('email')?.errors?.['email']"> 
    {{ 'eMail' | error:'isInvalid' }}
</span>

To implement this feature, you'll need to create a new file named error.pipe.ts with the following code snippet:

import { Pipe, PipeTransform } from '@angular/core';
import { TranslateService } from '@ngx-translate/core';

@Pipe({
          name: 'error'
})

export class ErrorPipe implements PipeTransform {
          constructor(private translateService: TranslateService) {
          }
          transform(value: string, arg: string): string {
                    return `${this.translateService.instant(value)} ${this.translateService.instant(arg).toLowerCase()}`;
          }
}

After creating the pipe file, remember to declare it in the component module such as in this example example.module.ts:

import { NgModule } from '@angular/core';  // standard
import { CommonModule } from '@common/angular';  // standard
import { ErrorPipe } from './path/to/error.pipe';

@NgModule({
  imports: [CommonModule, ExampleRoutingModule], // standard
  declarations: [ExampleComponent, ErrorPipe]
})
export class ExampleModule {}

Once everything is set up, you can utilize this custom pipe within your component like so:

<span
    *ngIf="checkoutForm.get('email')?.errors?.['email']"> 
    {{ 'eMail' | error:'isInvalid' }}
</span>

Answer 3

Answer №2

One way to implement a translation directive is shown in the following code snippet:

@Directive({
  selector: '[translate]'
})
export class TranslateDirective implements AfterViewInit {

  constructor(private el: ElementRef) { }

   ngAfterViewInit() {
    const translatedText = translate(this.el.nativeElement.innerText)
    this.el.nativeElement.innerText = translatedText;
  }
}

<span
  *ngIf="checkoutForm.get('email')?.errors?.['email']"
   translate>eMail lowerCaseFirstLetter('isInvalid')
</span>

Answer 4

One way to implement a translation directive is shown in the following code snippet:

@Directive({
  selector: '[translate]'
})
export class TranslateDirective implements AfterViewInit {

  constructor(private el: ElementRef) { }

   ngAfterViewInit() {
    const translatedText = translate(this.el.nativeElement.innerText)
    this.el.nativeElement.innerText = translatedText;
  }
}

<span
  *ngIf="checkoutForm.get('email')?.errors?.['email']"
   translate>eMail lowerCaseFirstLetter('isInvalid')
</span>

Tips for utilizing functions in an inline HTML translation pipe

The Text

Answer №1

Answer №2

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