ReactJS에서 'onKeyPress'이벤트를 처리하는 방법은 무엇입니까?

ReactJS에서 'onKeyPress'이벤트를 처리하는 방법은 무엇입니까?

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onKeyPressReactJS 에서 이벤트를 어떻게 작동시킬 수 있습니까? enter (keyCode=13)누를 때 경고해야합니다 .

var Test = React.createClass({
    add: function(event){
        if(event.keyCode == 13){
            alert('Adding....');
        }
    },
    render: function(){
        return(
            <div>
                <input type="text" id="one" onKeyPress={this.add} />    
            </div>
        );
    }
});

React.render(<Test />, document.body);

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나는 0.14.7 사용 반작용 함께 일하고 onKeyPress과 event.key잘 작동합니다.

handleKeyPress = (event) => {
  if(event.key === 'Enter'){
    console.log('enter press here! ')
  }
}
render: function(){
     return(
         <div>
           <input type="text" id="one" onKeyPress={this.handleKeyPress} />
        </div>
     );
}

---

render: function(){
     return(
         <div>
           <input type="text" id="one" onKeyDown={this.add} />
        </div>
     );
}

onKeyDownkeyCode이벤트를 감지 합니다.

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나를 위해 onKeyPress은 e.keyCode항상 0있지만, e.charCode정확한 값을 가지고있다. 경우 사용 onKeyDown에 올바른 코드를 e.charCode.

var Title = React.createClass({
    handleTest: function(e) {
      if (e.charCode == 13) {
        alert('Enter... (KeyPress, use charCode)');
      }
      if (e.keyCode == 13) {
        alert('Enter... (KeyDown, use keyCode)');
      }
    },
    render: function() {
      return(
        <div>
          <textarea onKeyPress={this.handleTest} />
        </div>
      );
    }
  });

키보드 이벤트 반응 .

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var Test = React.createClass({
     add: function(event){
         if(event.key === 'Enter'){
            alert('Adding....');
         }
     },
     render: function(){
        return(
           <div>
            <input type="text" id="one" onKeyPress={(event) => this.add(event)}/>    
          </div>
        );
     }
});

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리 액트는 당신이 생각할만한 종류의 사건을 전달하지 않습니다. 오히려, 그것은 합성 사건을 통과하고 있습니다 .

간단한 테스트에서는 event.keyCode == 0항상 사실입니다. 당신이 원하는 것은event.charCode

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파티에 늦었지만 TypeScript 에서이 작업을 수행하려고 시도했으며 다음을 수행했습니다.

<div onKeyPress={(e: KeyboardEvent<HTMLDivElement>) => console.log(e.key)}

This prints the exact key pressed to the screen. So if you want to respond to all "a" presses when the div is in focus, you'd compare e.key to "a" - literally if(e.key === "a").

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If you wanted to pass a dynamic param through to a function, inside a dynamic input::

<Input 
  onKeyPress={(event) => {
    if (event.key === "Enter") {
      this.doSearch(data.searchParam)
    }
  }}
  placeholder={data.placeholderText} />
/>

Hope this helps someone. :)

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There are some challenges when it comes to keypress event. Jan Wolter's article on key events is a bit old but explains well why key event detection can be hard.

A few things to note:

1. keyCode, which, charCode have different value/meaning in keypress from keyup and keydown. They are all deprecated, however supported in major browsers.
2. Operating system, physical keyboards, browsers(versions) could all have impact on key code/values.
3. key and code are the recent standard. However, they are not well supported by browsers at the time of writing.

To tackle keyboard events in react apps, I implemented react-keyboard-event-handler. Please have a look.

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Keypress event is deprecated, You should use Keydown event instead.

https://developer.mozilla.org/en-US/docs/Web/API/Document/keypress_event

handleKeyDown(event) {
    if(event.keyCode === 13) { 
        console.log('Enter key pressed')
  }
}

render() { 
    return <input type="text" onKeyDown={this.handleKeyDown} /> 
}

참고URL : https://stackoverflow.com/questions/27827234/how-to-handle-the-onkeypress-event-in-reactjs