Use of Enums in Angular 8 HTML template for *ngIf

Question

How can I use Enums in the Angular 8 template?

component.ts

import { Component } from '@angular/core'; import { SomeEnum } from './global';  @Component({   selector: 'my-app',   templateUrl: './app.component.html',   styleUrls: [ './app.component.css' ] }) export class AppComponent  {   name = SomeEnum.someValue; }  

component.html

<span *ngIf="name === SomeEnum.someValue">This has some value</value> 

This currently doesn't work, since the template has no reference to SomeEnum. How can I solve it?

ERROR Error: Cannot read property 'someValue' of undefined

Answer 1

in the TS

import { SomeEnum } from 'path-to-file';  public get SomeEnum() {   return SomeEnum;  } 

in the HTML use

*ngIf="SomeEnum.someValue === 'abc'" 

---

EDIT: Time goes by and we learn more as a developer, the approach I'm using right now doesn't use the get method. Both solutions work, just choose the one you like the most.

in the TS

import { SomeEnum } from 'path-to-file';  export class ClassName {   readonly SomeEnum = SomeEnum; } 

in the HTML use

*ngIf="SomeEnum.someValue === 'abc'" 

Answer 2

You'll have to declare it as a property first:

import { Component } from '@angular/core'; import { SomeEnum } from './global';  @Component({   selector: 'my-app',   templateUrl: './app.component.html',   styleUrls: [ './app.component.css' ] }) export class AppComponent  {   name = SomeEnum.someValue;   importedSomeEnum = SomeEnum; } 

And then use it in the template:

<span *ngIf="name === importedSomeEnum.someValue">This has some value</span> 

---

Here's a Working Demo for your ref.