JAVASCRIPT

angular pipe to capitalize first letter

transform(value:string): string {
  let first = value.substr(0,1).toUpperCase();
  return first + value.substr(1); 
}
  

angular capitalize first letter

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@Component({
  selector: 'titlecase-pipe',
  template: `<div>
    <p>{{'some string' | titlecase}}</p> <!-- output is expected to be "Some String" -->
    <p>{{'tHIs is mIXeD CaSe' | titlecase}}</p> <!-- output is expected to be "This Is Mixed Case" -->
    <p>{{'it's non-trivial question' | titlecase}}</p> <!-- output is expected to be "It's Non-trivial Question" -->
    <p>{{'one,two,three' | titlecase}}</p> <!-- output is expected to be "One,two,three" -->
    <p>{{'true|false' | titlecase}}</p> <!-- output is expected to be "True|false" -->
    <p>{{'foo-vs-bar' | titlecase}}</p> <!-- output is expected to be "Foo-vs-bar" -->
  </div>`
})
export class TitleCasePipeComponent {
}

method for convert first letter in uppercase in angular

app.filter('capitalize', function() {
  return function(token) {
      return token.charAt(0).toUpperCase() + token.slice(1);
   }
});