In Ionic2, should I use HTML, JavaScript and CSS only if possible?

Suppose I am using ionic2 to create hybrid apps, and it is common that I can finish a job by either using features of ionic2+angular or just html+ javascript+css only, for example, click to disable a button:

html+ javascript+css only solution:

<div id="myDiv" onclick="(
  function(){ 
    document.getElementById('myDiv').style.display='none'; 
  }
)()">myDiv</div>

ionic2/angular feature solution:

<div [disabled]="isDisabled" (click)="myFunction();">myDiv</div>

in ts:

myFunction(){
  this.isDisabled=true;
}

So my question is, if a job can be done by either using features of ionic2+angular or just html+ javascript+css only, which one should I choose?

I know somebody may ask: If you use Ionic2 but not use its features, why do you use Ionic2? But my idea is simple:

1. I use Ionic2 just for its feature of cross-platform only
2. If I use Ionic2 specific feature, my codes can be maintained by the one who knows about Ionic2 only, but if I just use HTML+JavaScript+CSS only, my codes can also be maintained by common web designers.

Is my main idea correct?