如何解决是的,对 Select 字段下拉菜单的验证 react-hook-form 不起作用
我是 ReactJs 的新手,所以我正在使用 react-hook-form 和 Yup 模式验证,我需要验证我的“选择字段”,当我的“选择字段”onChange 时我需要做一些事情。但是架构验证不起作用。 For example: when the submit button cliked and the value on "Select field" is null/empty the error message is appear,but when the select field value change to not null/ not empty value,the error message is not disapear,and error消息仍然退出。我的目标是当值“选择字段”不为空时,错误消息消失。有人知道怎么修这个东西吗?在此先感谢并为我的英语蹩脚感到抱歉。下面是我在代码和框中的代码和链接。 Codesandbox
import React from "react";
import ReactDOM from "react-dom";
import { useForm } from "react-hook-form";
import { yupResolver } from "@hookform/resolvers/yup";
import * as yup from "yup";
import "./styles.css";
const SignupSchema = yup.object().shape({
select: yup.string().required()
});
function App() {
const {
register,handleSubmit,formState: { errors }
} = useForm({
mode: "onChange",resolver: yupResolver(SignupSchema)
});
const onSubmit = (data) => {
alert(JSON.stringify(data));
};
const doSomething = (value) => {
// do something with my select value onChange
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
<div>
<label>Select</label>
<select
{...register("select")}
onChange={(e) => doSomething(e.target.value)}
>
<option value="">Null</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
{errors.select && <p>{errors.select.message}</p>}
</div>
<input type="submit" />
</form>
);
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />,rootElement);
解决方法
您可以使用触发器触发手动验证,也可以设置值并触发验证
设置值和触发器验证
import React from "react";
import ReactDOM from "react-dom";
import { useForm } from "react-hook-form";
import { yupResolver } from "@hookform/resolvers/yup";
import * as yup from "yup";
import "./styles.css";
const SignupSchema = yup.object().shape({
select: yup.string().required()
});
function App() {
const {
register,setValue,handleSubmit,formState: { errors }
} = useForm({
mode: "onChange",resolver: yupResolver(SignupSchema)
});
const onSubmit = (data) => {
alert(JSON.stringify(data));
};
const doSomething = async (value) => {
// do something with my select value onChange
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
<div>
<label>Select</label>
<select
{...register("select")}
onChange={(e) => setValue('select',e.target.value,{ shouldValidate: true })} // Using setValue
>
<option value="">Null</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
{errors.select && <p>{errors.select.message}</p>}
</div>
<input type="submit" />
</form>
);
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />,rootElement);
手动验证
import React from "react";
import ReactDOM from "react-dom";
import { useForm } from "react-hook-form";
import { yupResolver } from "@hookform/resolvers/yup";
import * as yup from "yup";
import "./styles.css";
const SignupSchema = yup.object().shape({
select: yup.string().required()
});
function App() {
const {
register,trigger,resolver: yupResolver(SignupSchema)
});
const onSubmit = (data) => {
alert(JSON.stringify(data));
};
const doSomething = async (value) => {
// do something with my select value onChange
await trigger(['select']) // Trigger validation on select
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
<div>
<label>Select</label>
<select
{...register("select")}
onChange={(e) => doSomething(e.target.value)}
>
<option value="">Null</option>
<option value="1">1</option>
<option value="2">2</option>
</select>
{errors.select && <p>{errors.select.message}</p>}
</div>
<input type="submit" />
</form>
);
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />,rootElement);
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