How to add dynamically css class using angular?
I want to get from backend style properties (i.e width, height) and create from this properties css style.
So, when in css I would have class="testClass", "testClass" should contains properties received from backend.
Is this possible?
Yes. You are looking for [ngClass], which works like this:
<some-element [ngClass]="'first second'">...</some-element>
<some-element [ngClass]="['first', 'second']">...</some-element>
<some-element [ngClass]="{'first': true, 'second': true, 'third': false}">...</some-element>
<some-element [ngClass]="stringExp|arrayExp|objExp">...</some-element>
<some-element [ngClass]="{'class1 class2 class3' : true}">...</some-element>
Or you could also do:
<some-element [ngClass]="getClass()">...</some-element>
getClass() {
return this.http.get.....
}
and return a string. Or You could just assign a variable. It's very flexible to accommodate most situations. But you wouldn't "return properties". What you would do is return a class, which has those properties you want. To set specific properties, I'd recommend using Renderer2:
import { Renderer2 } from '@angular/core';
Which has the setStyle method:
this.renderer2.setStyle('your element', style: string (such as width), value: any (such as 32px));
<element style="width: {{widthFromDb }};"and add those properties there. Or add a<style>element in your component that transpile to a variable. something like<style>.myClass { width: {{widthFromDb }} }</style>