angular2 template - How to add and remove CSS class names in Angular 2? -


i data in json format , must , must handle item user clicked on. i'm write code , correctly work.

my example dom-usage:

@component({   selector: 'my-app',   template: `   <div *ngfor="let person of personslist; let = index">     <span class="toggle-icon" (click)="togglestatus(person.id)" id="{{person.id}}">{{person.name}}</span>   </div>   `,   styles: ['.active { color: red; }'] }) export class app {   toggleisactive: boolean = false;   personslist: any;    constructor() {     this.personslist = [       {         "id": "1",         "name": "alex"       },       {         "id": "2",         "name": "john"       }     ]   }    togglestatus(id){     const span = document.getelementbyid(`${id}`);     if (span.classname.indexof('active') >= 0) {       span.classlist.remove('active');     } else {       span.classlist.add('active');     }   } }

how can add , remove css class names without dom similar case?

i'm add "personisactive" field, , use class binding.

@component({   selector: 'my-app',   template: `   <div *ngfor="let person of personslist; let = index">     <span class="toggle-icon" [class.active]="person.personisactive"         (click)="togglestatus(person.id)">{{person.name}}</span>   </div>   `,   styles: ['.active { color: red; }'] }) export class app {   toggleisactive: boolean = false;   personslist: any;    constructor() {     this.personslist = [       {         "id": "1",         "name": "alex",         "personisactive": false       },       {         "id": "2",         "name": "john",         "personisactive": false       }     ]   }    togglestatus(id){     (let = 0; < this.personslist.length; i++) {       if (this.personslist[i].id === id) {         this.personslist[i].personisactive= !this.personslist[i].personisactive;       }     }   } }

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