<p>我对react hook form还不熟悉，所以可能是一个简单的问题。我刚刚发现Controller无法将value作为数字使用。这让我很烦恼，但最终我在github的问题#8068中找到了解决方案，描述如下：设置一个onChange函数，像这样：</p> <pre class="brush:php;toolbar:false;">&lt;Controller - rules={{ valueAsNumber: true }} render={({ field }) =&gt; ( &lt;input - onChange={field.onChange} + onChange={(event) =&gt; field.onChange(+event.target.value)} type=&quot;number&quot; /&gt; )} /&gt;</pre> <p>所以我稍微修改了一下，得到了以下代码：</p> <pre class="brush:php;toolbar:false;">import React, { ChangeEvent } from 'react' import { Controller } from 'react-hook-form' import { getPlaceholder } from './getPlaceholder' import { IInput } from './types' const NumberInput: React.FC&lt;IInput&gt; = ({ control, name, ...props }) =&gt; { const placeholder = getPlaceholder({ type: &quot;number&quot; }); const numericalOnChange = (event: ChangeEvent&lt;HTMLInputElement&gt;) =&gt; { if (event.target.value === '') return null; return +event.target.value; } return ( &lt;Controller control={control} name={name} render={({ field: { onChange, ...field } }) =&gt; ( &lt;input {...props} {...field} type=&quot;number&quot; placeholder={placeholder} onChange={(event) =&gt; { const value = numericalOnChange(event) onChange(value) }} className=&quot;h-[20px] pl-[4px] py-[8px] bg-transparent border-b border-b-[#646464] focus:border-b-[#3898EC] text-[13px] text-[#F00] placeholder-[#646464] outline-none m-1 w-full&quot; /&gt; )} /&gt; ) } export default NumberInput</pre> <p>理论上应该可以工作，但实际上会提供一个Invalid Hook Call Error。</p>

// NumberInput.js
export const NumberInput = ({ value, onChange, ...rest }) => {
  const handleChange = (e) => {
    onChange(Number(e.target.value));
  };
 
  return (
    <input
      type="number"
      min={0}
      onChange={handleChange}
      value={value}
      {...rest}
    />
  );
};

<Controller
  name='number'
  control={control}
  render={({ field: { ref, ...field } }) => (
    <NumberInput {...field} type="number" />
  )}
/>