Add class to an element in Angular 4

Question

I was trying to create an image gallery with Angular 4.The logic behind this is to add a Cascading Style Sheet (CSS) class to the selected image that will show a red border on t

Answer 1

If you want to set only one specific class, you might write a TypeScript function returning a boolean to determine when the class should be appended.

TypeScript

function hideThumbnail():boolean{
    if (/* Your criteria here */)
        return true;
}

CSS:

.request-card-hidden {
    display: none;
}

HTML: