我已经更新了您的 CodeSanBox 代码,并在此处添加了完整代码:
import React, { useState, useEffect } from "react";
import ReactDOM from "react-dom";
import { useForm } from "react-hook-form";
import "./index.css";
function App() {
const {
register,
handleSubmit,
errors,
formState,
unregister,
setValue,
getValues,
reset
} = useForm({
mode: "onBlur",
reValidateMode: "onBlur",
shouldUnregister: true
});
//console.log(formState.isValid);
console.log(errors);
const [disabled, setDisabled] = useState(true);
const onSubmit = (data) => {
alert(JSON.stringify(data));
};
useEffect(() => {
// @ts-ignore
if (disabled) {
console.log("unregister");
reset({ ...getValues(), firstName: undefined, lastName: undefined });
unregister(["firstName", "lastName"]);
} else {
console.log("register");
register("firstName", { required: true });
register("lastName", { required: true });
}
}, [disabled]);
return (
<form onSubmit={handleSubmit(onSubmit)}>
<label htmlFor="id">ID</label>
<input
name="id"
placeholder="id"
ref={register({ required: true, maxLength: 50 })}
/>
{errors.id && <p>"ID is required"</p>}
<fieldset disabled={disabled}>
<legend>
<input
type="checkbox"
name={"name"}
ref={register}
onClick={() => setDisabled(!disabled)}
/>
<span>Check</span>
</legend>
<label htmlFor="firstName">First Name</label>
<input
name="firstName"
placeholder="Bill"
onChange={(e) => {
console.log(e.target.value);
setValue("firstName", e.target.value);
}}
ref={register({ required: !disabled })}
/>
{errors.firstName && <p>"First name is required"</p>}
<label htmlFor="lastName">Last Name</label>
<input
name="lastName"
placeholder="Luo"
onChange={(e) => setValue("lastName", e.target.value)}
ref={register({ required: !disabled })}
/>
{errors.lastName && <p>"Last name is required"</p>}
</fieldset>
<input type="submit" disabled={!formState.isValid} />
</form>
);
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);
首先,我发现您将disabled
state 设置为false
应该true
作为初始值,关于这个问题,我使用了reset
和getValues
函数,当disabled
状态发生变化时。
为您编辑以轻松识别代码更改,我已在 CodeSanBox 恢复了所有代码。