src/react-input-placeholder.js
function(e) {
            this.hasFocus = true;
            this.setSelectionIfNeeded(e.target);

            if (this.props.onFocus) {
                return this.props.onFocus(e);
            }
        }
function(e) {
            this.hasFocus = true;
            this.setSelectionIfNeeded(e.target);

            if (this.props.onFocus) {
                return this.props.onFocus(e);
            }
        }
function ( e ) { this . hasFocus = true ; this . setSelectionIfNeeded ( e . target ) ; if ( this . props . onFocus ) { return this . props . onFocus ( e ) ; } }
keep track of focus
keep track of focus