Cannot approach Typescript enum within HTML

Question

I made an enum with Typescript to use in MyService.service.ts MyComponent.component.ts and MyComponent.component.html.

export enum ConnectionResult {
    Succes         


        

Answer 1

import MyEnum from enums;  

.... Declarate var ....

public myEnum = MyEnum;

and in html use:

<div *ngIf="xxx === myEnum.DATA"> ... </div>

Answer 2

You can just add the enum to your component as property and use the same name of the enum (Quarters) in your templates:

enum Quarters{ Q1, Q2, Q3, Q4}

export class AppComponent {
   quarter = Quarters.Q1
   Quarters = Quarters
}

In your template

<div *ngIf="quarter == Quarters.Q1">I=am only visible for Q1</div> 

The reason why this works is that the new porperty is basically of this type:

TileType: typeof TileType

Answer 3

You can bind as text if enum defined as below (those values won't enforce a json string value coming from API)

  export enum SomeEnum {
      Failure,
      Success,
  }

In .ts file

public status: SomeEnum;

In .html

<div *ngIf="status == 'Success'">

Another way, tested in Angular 8+ is to have enums with numbers

  export enum SomeEnum {
      Failure = 0,
      Success = 1,
  }

In .ts file

public status: SomeEnum;

In .html

<div *ngIf="status == 1">

Answer 4

You will have to write it in the following way in .ts file.

enum Tenure { day, week, all }

export class AppComponent {
    tenure = Tenure.day
    TenureType = Tenure
}

And now in html you can use this like

*ngIf = "tenure == TenureType.day ? selectedStyle : unSelectedStyle"

I hope it is more clear now. :)

Answer 5

The scope of the template is limited to the component instance members. If you want to refer to something it needs to be available there

class MyComponent {
  public get connectionResult(): typeof ConnectionResult {
    return ConnectionResult; 
  }
}

In the HTML you can now use

*ngIf="connectionResult.Success"

See also Angular2 access global variables from HTML template