Что не так с моим Угловым кодом? Я получаю: Cannot read property 'remove' of undefined at BrowserDomAdapter.removeClass ...
Угловой: условный класс с * ngClass
<ol class="breadcrumb">
<li *ngClass="{active: step==='step1'}" (click)="step='step1; '">Step1</li>
<li *ngClass="{active: step==='step2'}" (click)="step='step2'">Step2</li>
<li *ngClass="{active: step==='step3'}" (click)="step='step3'">Step3</li>
</ol>
http://www.angulartutorial.net/2017/12/5-different-ways-for-condition.html – Prashobh