React onKeyDown vs onKeyPress

Question

我正在寻找电话号码格式。当用户输入号码时。在输入字段中。它应该是这样的。 （123）-111-1233    提前谢谢。我正在分享我的工作。我应该使用onKeyDown还是onKeyPress。它不完整的代码，但我给和Idea.where我必须添加格式电话号码的功能

Class FormInput extends React.Component {

  constructor() {
    super();
    this.state = {
      phone: '',

}    
    this.handleKeyPress=this.handleKeyPress.bind(this);
}

 phoneFormat(input){
              // Strip all characters from the input except digits
              input = input.replace(/\D/g,'');

              // Trim the remaining input to ten characters, to preserve phone number format
              input = input.substring(0,10);

              // Based upon the length of the string, we add formatting as necessary
              var size = input.length;
              if(size == 0){
                      input = input;
              }else if(size < 4){
                      input = '('+input;
              }else if(size < 7){
                      input = '('+input.substring(0,3)+') '+input.substring(3,6);
              }else{
                      input = '('+input.substring(0,3)+') '+input.substring(3,6)+' - '+input.substring(6,10);
              }
              return input;
      }

 handleKeyPress(event){

        this.setState({});

    }
     <input name='phone' type='text' ref="input" placeholder='(___)-___-____'  value={this.state.phone}  onKeyDown={this.handleKeyPress} onChange={this.handleChange}/>


}