element javascript method call?

Answer

We can explain the javascript method and object value with the value is div tag in html. In coding basic level is html. there have various tag.
<div *dxTemplate="let cell of 'valueTemplate'">
  <div [ngstyle]="{color:(fmtValue(cell.value).startsWith('(')) ? 'green' : 'blue'}">
  {{fmtValue(cell.value)}}
  </div>
</div>