Question

我不理解,投入的彩色类型是如何运作的。

我试图带一个色体,把这个数值变成一个国家变量“col”。

const [color, setColor] = useState(false);
const colorPicker = () => {
    console.log("colorPicker", color.target);
    return(
        <input type="color" value={color} onChange={setColor}/>
    );
}

但是,这只给我留下了青.和我试图看像肤色那样的 j子。目标是:

Warning: This synthetic event is reused for performance reasons. If you re seeing this, you re accessing the property target on a released/nullified synthetic event. This is set to null. If you must keep the original synthetic event around, use event.persist(). See https:// fb dot me/react-event-pooling for more information.

Answer 1

<代码>onChange 活动发送人收到作为参数的物体。

该活动标有选定颜色作为<代码>event.target. Value,就像固定案文输入一样。

With this in mind, the following will allow you to hold on to the selected color:

const ColorPicker = () => {
  const [color, setColor] = useState(null);

  console.log("colorPicker", color);

  return (
    <input type="color" value={color} onChange={e => setColor(e.target.value)} />
  );
}

关于你试图查阅<代码>event.target时发现的错误,错误信息已经做了很好的解释。我建议你看一下它所提到的文件页,这应该有助于你理解这个问题。

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