Use of Enums in Angular 8 HTML template for *ngIf
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'"
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.
You can declare a field equal to the SomeEnum
enum (it may be imported from another file) as a public class field in the component file. Then it will be accessible in the template.
// component
export class AppComponent {
name = SomeEnum.someValue;
enum = SomeEnum;
}
// template
<span *ngIf="name === enum.someValue">This has some value</value>
Yes, the template cannot refer to the enum directly. There are few ways to do this. 1. Add Enum reference to the component ts file like below
someEnum = SomeEnum;
then you will be able to use the reference in your template like this
<span *ngIf="name === someEnum.someValue">This has some value</value>
- The second way is to call a function from your template with name as parameter and compare it in the typescript file
<span *ngIf="checkCondition(name)">This has some value</value>