ng-if based on css clas code example
Example 1: if condition in class angular 8
<i [class]="user.login_status == 1 ? 'fas fa-circle user_active' : 'fas fa-circle user_inactive'" aria-hidden="true"></i>
Example 2: ngclass
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<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>