react-hook-form Controller发生错误时如何聚焦?

IT技术 reactjs react-hook-form yup
2021-05-10 15:38:52

我正在使用Controllerreact-hook-form渲染自定义组件

如果使用时出现错误register,则焦点正常,但Controller 不正常。

当自定义组件仅处理单个输入时,我能够找到一种处理错误的方法,但是当它有多个输入时,我找不到一种方法来处理它。

表单.js

import { Controller, useForm } from "react-hook-form";
import CustomInput from "./CustomInput";
import * as yup from "yup";

const schema = yup.object({
  name: yup.object().shape({
    first: yup.string().required(),
    last: yup.string().required(),
  }),
});
function Form() {
  const {
    handleSubmit,
    control,
    formState: { errors },
  } = useForm({
    defaultValues: { name: { first: "", last: "" } },
    resolver: yupResolver(schema),
  });

  const onSubmit = (data) => console.log(data);

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      <Controller
        name="name"
        control={control}
        rules={{ required: true }}
        render={({ field }) => (
          <CustomInput
            value={field.value}
            onChange={(value) => field.onChange(value)}
            errors={errors}
          />
        )}
      />
      <button type="submit">Send</button>
    </form>
  );
}

export default Form;

自定义输入.js

function CustomInput({ value, onChange, errors }) {
  const changeFirst = (e) => {
    onChange({ first: e.target.value, last: value?.last });
  };

  const changeLast = (e) => {
    onChange({ first: value?.first, last: e.target.value });
  };

  return (
    <div>
      <input type="text" value={value.first} onChange={changeFirst} />
      <input type="text" value={value.last} onChange={changeLast} />
      {errors?.name && (
        <p className="errmsg">
          {errors?.name?.first?.message || errors?.name?.last?.message}
        </p>
      )}
    </div>
  );
}

export default CustomInput;

当自定义组件中有多个输入时,如何获得错误焦点?

1个回答

您可以setFocus从 RHF使用首先,检测errors对象何时发生变化,然后找到具有该对象的第一个字段并调用setFocus(field)

const {
  setFocus,
  formState: { errors },
  ...
} = useForm<FormValues>();

React.useEffect(() => {
  const firstError = Object.keys(errors).reduce((field, a) => {
    return !!errors[field] ? field : a;
  }, null);

  if (firstError) {
    setFocus(firstError);
  }
}, [errors, setFocus]);

代码沙盒演示