description

# add method Null safety

bool add (

1. String value

)
inherited

Add the class `value` to element.

This is the Dart equivalent of jQuery's addClass.

## Implementation

    bool add(String value) {
      _validateToken(value);
      // TODO - figure out if we need to do any validation here
      // or if the browser natively does enough.
      return modify((s) => s.add(value)) ?? false;
    }