angular pipe first letter uppercase

1{{ value_expression | titlecase }}

1transform(value:string): string {
2  let first = value.substr(0,1).toUpperCase();
3  return first + value.substr(1); 
4}
5  

1transform(value:string){
2let first = value.substr(0,1).toUpperCae();
3return first + value.substr(1);
4}