Javascript 为什么我';我在React.js中使用useEffect钩子时收到这些警告?
js和hooks,我一直收到这些警告,我只是不明白为什么,我确实阅读了React文档,但仍然不明白 /src/CustomerList.js 第32:6行:React Hook useEffect缺少依赖项:“loadData”。包括它或删除 依赖项数组/详尽的deps /src/CustomerForm.js 第44:9行:React Hook useEffect缺少依赖项:“setValue”。包括它或删除 依赖项数组/详尽的deps 我将只粘贴洞代码的一面,以防问题不在useEffect本身Javascript 为什么我';我在React.js中使用useEffect钩子时收到这些警告?,javascript,reactjs,react-hooks,Javascript,Reactjs,React Hooks,js和hooks,我一直收到这些警告,我只是不明白为什么,我确实阅读了React文档,但仍然不明白 /src/CustomerList.js 第32:6行:React Hook useEffect缺少依赖项:“loadData”。包括它或删除 依赖项数组/详尽的deps /src/CustomerForm.js 第44:9行:React Hook useEffect缺少依赖项:“setValue”。包括它或删除 依赖项数组/详尽的deps 我将只粘贴洞代码的一面,以防问题不在useEffect本
const CustomerForm = ({customer, saveSuccess}) => {
const { register, handleSubmit, errors, setValue, reset } = useForm();
const onSubmit = (data, e) => {
e.preventDefault();
if (customer) {
data.id = customer.id;
axios.put(BASE_URL, {
id : data.id,
firstName : data.firstName,
lastName : data.lastName,
phoneNumber:data.phoneNumber,
email : data.email
}).then(response => {
alert("Se actualizó exitosamente.")
})
} else {
axios.post(BASE_URL, {
firstName : data.firstName,
lastName : data.lastName,
phoneNumber:data.phoneNumber,
email : data.email
}).then(response => {
alert("Se guardó exitosamente.")
})
}
saveSuccess();
};
useEffect(() => {
if (customer) {
setValue("firstName", customer.firstName);
setValue("lastName", customer.lastName);
setValue("phoneNumber", customer.phoneNumber);
setValue("email", customer.email);
}
},[customer]);
return (
<form onSubmit={handleSubmit(onSubmit)} noValidate>
<Input
name="firstName"
inputRef={register({ required: true})}
placeholder="First Name"
error={!!errors.firstName}
fullWidth
/>
<p style={{color: "red"}}>{errors.firstName && "First Name is required"}</p>
<Input
name="lastName"
// setValue = {customerForm.lastName}
inputRef={register({ required: true})}
placeholder="Last Name"
error={!!errors.lastName}
fullWidth
/>
<p style={{color: "red"}}>{errors.lastName && "Last Name is required"}</p>
<Input
name="phoneNumber"
// setValue = {customerForm.phoneNumber}
inputRef={register({ required: true})}
placeholder="Phone Number"
error={!!errors.phoneNumber}
fullWidth
/>
<p style={{color: "red"}}>{errors.phoneNumber && "Phone Number is required"}</p>
<Input
name="email"
// setValue = {customerForm.email}
inputRef={register({ required: true})}
placeholder="Email"
error={!!errors.email}
fullWidth
/>
<p style={{color: "red"}}>{errors.email && "Email is required"}</p>
<Button
variant="contained"
color="default"
onClick={() => { reset({}) }}
>
Reset
</Button>
<Button
type="submit"
variant="contained"
color="primary"
>
Save
</Button>
</form>
);
}
constcustomerform=({customer,saveSuccess})=>{
常量{register,handleSubmit,errors,setValue,reset}=useForm();
const onSubmit=(数据,e)=>{
e、 预防默认值();
如果(客户){
data.id=customer.id;
axios.put(基本URL{
id:data.id,
firstName:data.firstName,
lastName:data.lastName,
phoneNumber:data.phoneNumber,
电子邮件:data.email
})。然后(响应=>{
警觉(“现实存在。”)
})
}否则{
axios.post(基本URL{
firstName:data.firstName,
lastName:data.lastName,
phoneNumber:data.phoneNumber,
电子邮件:data.email
})。然后(响应=>{
警报(“Se guardóexitosamente.”
})
}
saveSuccess();
};
useffect(()=>{
如果(客户){
setValue(“firstName”,customer.firstName);
setValue(“lastName”,customer.lastName);
设置值(“电话号码”,customer.phoneNumber);
设置值(“电子邮件”,customer.email);
}
},[客户];
返回(
{errors.firstName&&“firstName是必需的”}
{errors.lastName&&“lastName是必需的”}
{errors.phoneNumber&&“需要电话号码”}
{errors.email&&“email是必需的”}
{reset({}}}
>
重置
拯救
);
}
您是否能够链接到工作示例?这可能有助于调试,但只要仔细阅读代码,如果您在useffect
调用中添加这些依赖项,这些警告似乎就应该得到解决。例如:
/* CustomerForm */
useEffect(() => {
if (customer) {
setValue("firstName", customer.firstName);
setValue("lastName", customer.lastName);
setValue("phoneNumber", customer.phoneNumber);
setValue("email", customer.email);
}
},[customer, loadData, setValue]);
您可以添加缺少的依赖项,例如
useEffect(() => {
if (customer) {
setValue("firstName", customer.firstName);
setValue("lastName", customer.lastName);
setValue("phoneNumber", customer.phoneNumber);
setValue("email", customer.email);
}
},[customer,setValue,loadData]);
但在某些情况下,添加方法作为依赖项会导致无限重渲染,因此我认为克服警告的最佳方法是通过
useEffect(() => {
if (customer) {
setValue("firstName", customer.firstName);
setValue("lastName", customer.lastName);
setValue("phoneNumber", customer.phoneNumber);
setValue("email", customer.email);
}
//eslint-disable-next-line
},[customer]);
还有一个警告说它在
CustomerList.js
中,但是示例代码中没有提到该组件,您可以链接它吗?