No .bind() or Arrow Function in JSX Props

issue from

​​https://github.com/MichaelCereda/react-native-form-generator/issues/45​​

warning code

export class InputField extends React.Component{

  handleValidation(isValid, validationErrors){
    this.valid = isValid;
    this.validationErrors = validationErrors;
  }
  setValue(value){
    this.refs.fieldComponent.setValue(value)
  }
  focus(){
    this.refs.fieldComponent.focus()
  }
  render(){
    return(<InputComponent
      {...this.props}
      ref='fieldComponent'
      onValidation={this.handleValidation.bind(this)}
      //onChange={this.handleChange.bind(this)}
      //ref={this.props.fieldRef}
      />
    );
  }
}

optimize code

export class InputField extends React.Component{

  handleValidation(isValid, validationErrors){
    this.valid = isValid;
    this.validationErrors = validationErrors;
  }
  setValue(value){
    this.refs.fieldComponent.setValue(value)
  }
  focus(){
    this.refs.fieldComponent.focus()
  }
  render(){
    return(<InputComponent
      {...this.props}
      ref='fieldComponent'
      onValidation={this.handleValidation}
      />
    );
  }
}

link read