30秒学会 React 片段 – Slider

Renders a slider element that uses a callback function to pass its value to the parent component.

• Use object destructuring to set defaults for certain attributes of the <input> element.
• Render an <input> element of type "range" and the appropriate attributes, use the callback function in the onChange event to pass the value of the input to the parent.

代码实现

function Slider({ callback, disabled = false, readOnly = false }) {
  return (
    <input
      type="range"
      disabled={disabled}
      readOnly={readOnly}
      onChange={({ target: { value } }) => callback(value)}
    />
  );
}

使用样例

ReactDOM.render(<Slider callback={val => console.log(val)} />, document.getElementById('root'));