How to submit a form using Enter key in react.js?

问题

Here is my form and the onClick method. I would like to execute this method when the Enter button of keyboard is pressed. How ?

N.B: No jquery is appreciated.

 comment: function (e) {
        e.preventDefault();
        this.props.comment({comment: this.refs.text.getDOMNode().value, userPostId:this.refs.userPostId.getDOMNode().value})
    },


 <form className="commentForm">
     <textarea rows="2" cols="110" placeholder="****Comment Here****" ref="text"  /><br />
    <input type="text" placeholder="userPostId" ref="userPostId" /> <br />
     <button type="button" className="btn btn-success" onClick={this.comment}>Comment</button>
    </form>

回答1:

Change <button type="button" to <button type="submit". Remove the onClick. Instead do <form className="commentForm" onSubmit={this.onFormSubmit}>. This should catch clicking the button and pressing the return key.

onFormSubmit = e => {
  e.preventDefault();
  const { name, email } = this.state;
  // send to server with e.g. `window.fetch`
}

...

<form onSubmit={this.onFormSubmit}>
  ...
  <button type="submit">Submit</button>
</form>

回答2:

Use keydown event to do it:

   input: HTMLDivElement | null = null;

   onKeyDown = (event: React.KeyboardEvent<HTMLDivElement>): void => {
      // 'keypress' event misbehaves on mobile so we track 'Enter' key via 'keydown' event
      if (event.key === 'Enter') {
        event.preventDefault();
        event.stopPropagation();
        this.onSubmit();
      }
    }

    onSubmit = (): void => {
      if (input.textContent) {
         this.props.onSubmit(input.textContent);
         input.focus();
         input.textContent = '';
      }
    }

    render() {
      return (
         <form className="commentForm">
           <input
             className="comment-input"
             aria-multiline="true"
             role="textbox"
             contentEditable={true}
             onKeyDown={this.onKeyDown}
             ref={node => this.input = node} 
           />
           <button type="button" className="btn btn-success" onClick={this.onSubmit}>Comment</button>
         </form>
      );
    }

回答3:

this is how you do it if you want to listen for the "Enter" key. There is an onKeydown prop that you can use and you can read about it in react doc

and here is a codeSandbox

const App = () => {
    const something=(event)=> {
        if (event.keyCode === 13) {
            console.log('enter')
        }
    }
return (
    <div className="App">
        <h1>Hello CodeSandbox</h1>
        <h2>Start editing to see some magic happen!</h2>
        <input  type='text' onKeyDown={(e) => something(e) }/>
    </div>
);
}

回答4:

It's been quite a few years since this question was last answered. React introduced "Hooks" back in 2017, and "keyCode" has been deprecated.

Now we can write this:

  useEffect(() => {
    const listener = event => {
      if (event.code === "Enter" || event.code === "NumpadEnter") {
        console.log("Enter key was pressed. Run your function.");
        // callMyFunction();
      }
    };
    document.addEventListener("keydown", listener);
    return () => {
      document.removeEventListener("keydown", listener);
    };
  }, []);

This registers a listener on the keydown event, when the component is loaded for the first time. It removes the event listener when the component is destroyed.

来源：https://stackoverflow.com/questions/33211672/how-to-submit-a-form-using-enter-key-in-react-js