How to get input textfield values when enter key is pressed in react js?

问题

I want to pass textfield values when user press enter key from keyboard. In onChange() event, I am getting the value of the textbox, but How to get this value when enter key is pressed ?

Code:

import TextField from 'material-ui/TextField';

class CartridgeShell extends Component {

   constructor(props) {
      super(props);
      this.state = {value:''}
      this.handleChange = this.handleChange.bind(this);
   }

   handleChange(e) {
      this.setState({ value: e.target.value });
   }

   render(){
      return(
         <TextField 
             hintText="First Name" 
             floatingLabelText="First Name*"
             value={this.state.value} 
             onChange={this.handleChange} 
             fullWidth={true} />
      )
   }
}

回答1:

Use onKeyDown event, and inside that check the key code of the key pressed by user. Key code of Enter key is 13, check the code and put the logic there.

Check this example:

class CartridgeShell extends React.Component {

   constructor(props) {
      super(props);
      this.state = {value:''}

      this.handleChange = this.handleChange.bind(this);
      this.keyPress = this.keyPress.bind(this);
   } 
 
   handleChange(e) {
      this.setState({ value: e.target.value });
   }

   keyPress(e){
      if(e.keyCode == 13){
         console.log('value', e.target.value);
         // put the login here
      }
   }

   render(){
      return(
         <input value={this.state.value} onKeyDown={this.keyPress} onChange={this.handleChange} fullWidth={true} />
      )
    }
}

ReactDOM.render(<CartridgeShell/>, document.getElementById('app'))

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.1.0/react-dom.min.js"></script>


<div id = 'app' />

Note: Replace the input element by Material-Ui TextField and define the other properties also.

回答2:

Adding onKeyPress will work onChange in Text Field.

<TextField
  onKeyPress={(ev) => {
    console.log(`Pressed keyCode ${ev.key}`);
    if (ev.key === 'Enter') {
      // Do code here
      ev.preventDefault();
    }
  }}
/>

回答3:

html

<input id="something" onkeyup="key_up(this)" type="text">

script

function key_up(e){
    var enterKey = 13; //Key Code for Enter Key
    if (e.which == enterKey){
        //Do you work here
    }
}

Next time, Please try providing some code.

来源：https://stackoverflow.com/questions/43384039/how-to-get-input-textfield-values-when-enter-key-is-pressed-in-react-js

标签

javascript

reactjs

material-ui