Combine [NgStyle] With Condition (if..else)

One can also use this kind of condition:

<div [ngStyle]="myBooleanVar && {'color': 'red'}"></div>

It requires a bit less string concatenation...

Using a ternary operator inside the ngStyle binding will function as an if/else condition.

<div [ngStyle]="{'background-image': 'url(' + value ? image : otherImage + ')'}"></div>