Having trouble with obtaining real-time text translation using ngx translate/core in Angular 2 with Typescript

Issue :

I am facing a challenge with fetching dynamic text from a JSON file and translating it using the translate.get() method in Angular2.

this.translate.get('keyInJson').subscribe(res => { 
                this.valueFromJson = res;
/*
creating an object using above text
*/
            });

Since the translation process is asynchronous, I am unable to display the translated text on page load. I tried using Observables and Promises but couldn't achieve the desired outcome. While I did manage to get the translated text after trying different methods, the code became overly complex and unreliable.

Expected/desired behavior: The translated version of the text should be loaded successfully.

Steps to reproduce the issue: Generate the text dynamically instead of hardcoding it in HTML and attempt to render the translated version.

Environment: Angular2, Typescript, Ionic 2

javascriptangulartypescriptionic2

Answer №1

@nkadu1

Obtain the immediate translated value by providing a key (or an array of keys). This method operates synchronously, while the default file loader works asynchronously. Make sure to verify that your translations have been loaded before using this method.

const translated = this.translate.instant('keyInJson');

@masterach If you are searching for a solution, consider using TranslateHttpLoader. Check out this article for more insights.

Answer №2

I have been incorporating @ngx-translate into my projects for quite some time now. I utilize the module in two distinct ways:

  1. Utilizing the pipe:

{{'code_to_translate' | translate }}

  1. Using the service directly

const translateText: string = this.translateService.instant('code_to_translate')

The translation service needs to be injected in the constructor of your component (or service).

Typically, I define the translated strings within my app initialization function before loading the components, and rely on a single translation service for the entire application. Additionally, I set up a custom TranslateLoader to handle translations from various sources such as external APIs or JSON files.

Answer №3

Is there a specific reason for not utilizing the pipe in HTML and instead opting to translate in TypeScript?

<div>{{ 'HELLO' | translate:param }}</div>

Alternatively

<div [innerHTML]="'HELLO' | translate"></div>

Answer №4

If you have a global service:

private _valueFromJson: string;
constructor(private translate: TranslateService) {
  translate.get('keyInJson').subscribe(res => { 
    this._valueFromJson = res;
  });
}
get valueFromJson() {
  return this._valueFromJson;
}

Another option is:

public valueFromJson: string;
constructor(private translate: TranslateService) {
  translate.get('keyInJson').subscribe(res => { 
    this.valueFromJson = res;
  });
}

You can then bind directly in your component template:

<div>{{ globalService.valueFromJson }}</div>

Alternatively, you can also utilize a synchronous method:

this.valueFromJson = translate.instant('keyInJson');

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