当聚焦时,如何用Reactjs选择输入中的所有文本？

Question

例如:http://codepen.io/Enclave88/pen/YqNpog？edit = 1010

var InputBox = React.createClass({
  render: function() {
    return (
      <input className="mainInput" value='Some something'></input>
    )
  }
});

Answer 1

Functional component:

const handleFocus = (event) => event.target.select();
const Input = (props) => <input type="text" value="Some something" onFocus={handleFocus} />

ES6 class component:

class Input extends React.Component {
    handleFocus = (event) => event.target.select();

    render() {
        return (
            <input type="text" value="Some something" onFocus={this.handleFocus} />
        );
    }
}

React.createClass:

React.createClass({
    handleFocus: function(event) {
      event.target.select();
    },

    render: function() {
      return (
        <input type="text" value="Some something" onFocus={this.handleFocus} />
      );
    },
})

Answer 2

让我们根据@dschu 的答案添加最简单的：

...
<input type='text' value='Some something' onFocus={e => e.target.select()} />
...

Answer 3

谢谢，我很感激。我是这样做的：

var input = self.refs.value.getDOMNode();
            input.focus();
            input.setSelectionRange(0, input.value.length);

Answer 4

使用 useRefHook 的另一种方式功能组件：

const inputEl = useRef(null);

function handleFocus() {
  inputEl.current.select();
}

<input
  type="number"
  value={quantity}
  ref={inputEl}
  onChange={e => setQuantityHandler(e.target.value)}
  onFocus={handleFocus}
/>

Answer 5

var InputBox = React.createClass({
  getInitialState(){
    return {
      text: ''
    };
  },
  render: function () {
    return (
      <input
        ref="input"
        className="mainInput"
        placeholder='Text'
        value={this.state.text}
        onChange={(e)=>{this.setState({text:e.target.value});}}
        onFocus={()=>{this.refs.input.select()}}
      />
    )
  }
});

你必须在输入上设置ref,在聚焦时你必须使用select().