/Javascript/React/Use ref in component reactjs

Use ref in component reactjs

class CustomTextInput extends React.Component {
  constructor(props) {
    super(props);

    this.textInput = null;
    this.setTextInputRef = element => {      this.textInput = element;    };
    this.focusTextInput = () => {      // Donne le focus au champ texte en utilisant l’API DOM native.      if (this.textInput) this.textInput.focus();    };  }

  componentDidMount() {
    // Focus automatique sur le champ au montage
    this.focusTextInput();  }

  render() {
    // Utilise la fonction de rappel `ref` pour stocker une référence à l’élément
    // DOM du champ texte dans une propriété d’instance (ex. this.textInput)
    return (
      <div>
        <input
          type="text"
          ref={this.setTextInputRef}        />
        <input
          type="button"
          value="Donner le focus au champ texte"
          onClick={this.focusTextInput}        />
      </div>
    );
  }
}

-1

Source: fr.reactjs.org

Use ref in component reactjs

class AutoFocusTextInput extends React.Component {
  constructor(props) {
    super(props);
    this.textInput = React.createRef();  }

  componentDidMount() {
    this.textInput.current.focusTextInput();  }

  render() {
    return (
      <CustomTextInput ref={this.textInput} />    );
  }
}

-2

Source: fr.reactjs.org

Use ref in component reactjs

function CustomTextInput(props) {
  return (
    <div>
      <input ref={props.inputRef} />    </div>
  );
}

class Parent extends React.Component {
  render() {
    return (
      <CustomTextInput
        inputRef={el => this.inputElement = el}      />
    );
  }
}

-2

Source: fr.reactjs.org

Similar codes

1 vote353 views1 answer
Module not found reactstrap
Javascript React
0 vote421 views1 answer
Install react loading spinner
Javascript React
1 vote330 views2 answers
Yarn react native cli
Javascript React
3 votes325 views5 answers
./src/App.js Attempted import error: 'Switch' is not exported from 'react-router-dom'.
Javascript React
65 votes308 views6 answers
React routing
Javascript React
1 vote337 views1 answer
React footer
Javascript React
0 vote375 views1 answer
React inject component into another component
Javascript React
0 vote340 views1 answer
Implementing state lifecycle in react class component
Javascript React
9 votes351 views3 answers
Shadowoffset react native constructor
Javascript React
0 vote359 views2 answers
.env file example react native
Javascript React