Angular 2 add multiple classes via [class.className] binding

While adding a single class works great in this way -

[class.loading-state]="loading"

But how do I add multiple classes Ex if loading is true add class - "loading-state" & "my-class"

How do I get it done via the [class] binding

2 Answers

You can do this by simply using ngClass :

Here first,second and third are the name of the classes.

And instead of true/false , you can directly put your conditions over there

 <div [ngClass]="{'first': true, 'second': true, 'third': false}">...</div> 

In your case

 <div [ngClass]="{'loading-state': loading, 'my-class': loading }">...</div> 

Or Shorter Veriosn (as @matko.kvesic commented)

<div [ngClass]="{'loading-state my-class': loading}">...</div> 

Although Vivek Doshi answer is totally correct, below I put other alternatives to do the same with different boolean variables:

1st Solution: [class.className]

Template:

<div [class.first-class]="addFirst" [class.second-class]="addSecond">...</div> 

Component:

export class MyComponent { ... addFirst: boolean; addSecond: boolean; ... } 

2nd Solution: [ngClass] with method binding

Template:

<div [ngClass]="setClasses()">...</div> 

Component:

export class MyComponent { ... addFirst: boolean; addSecond: boolean; ... setClasses() { return { 'first-class': this.addFirst, 'second-class': this.addSecond }; } ... } 

Last solution, but not least:

Template:

<div [ngClass]="{'first-class': addFirst, 'second-class': addSecond}">...</div> 

Component:

export class MyComponent { ... addFirst: boolean; addSecond: boolean; ... }