Javascript 合成事件而不是useState值
我是个新手,所以在我试图解释这个问题时,请容忍我。我正在创建一个应用程序,它可以提取所有COD客户信息,允许用户在其中搜索,还可以创建一个计算器来计算网站上的总费用,但是所有的工作和堆栈都需要更多的文本而不是代码,所以我真的只是填满空间来发布我真正的问题 我在管理员页面上工作,但每当我点击提交按钮进行测试时,我都会得到以下信息:Javascript 合成事件而不是useState值,javascript,reactjs,Javascript,Reactjs,我是个新手,所以在我试图解释这个问题时,请容忍我。我正在创建一个应用程序,它可以提取所有COD客户信息,允许用户在其中搜索,还可以创建一个计算器来计算网站上的总费用,但是所有的工作和堆栈都需要更多的文本而不是代码,所以我真的只是填满空间来发布我真正的问题 我在管理员页面上工作,但每当我点击提交按钮进行测试时,我都会得到以下信息: SyntheticEvent {dispatchConfig: null,etc} 对于表单中的所有3个字段,我不知道为什么。所有my console.log都将字段
SyntheticEvent {dispatchConfig: null,etc}
对于表单中的所有3个字段,我不知道为什么。所有my console.log都将字段显示为null/event,因此不会传递任何信息
import React, { useState, useEffect } from "react";
import { registerUser } from "../api";
const Admin = () => {
const admin = localStorage.getItem("admin");
const [user, setUser] = useState("");
const [password, setPassword] = useState("");
const [email, setEmail] = useState("");
const handleSubmit = (event) => {
event.preventDefault();
console.log(user, password, email);
cancelCourse();
};
const cancelCourse = () => {
setUser("");
setPassword("");
setEmail("");
};
if (!admin) {
return <div className="pleaselogin">You do not have access</div>;
} else {
return (
<div className="page">
<form id="create">
<div>Create User</div>
<input
className="form-input"
id="name"
placeholder="Enter User's Name"
onChange={setUser}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Password"
onChange={setPassword}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Email"
onChange={setEmail}
></input>
<button className="submit" onClick={handleSubmit}>
Submit
</button>
</form>
</div>
);
}
};
export default Admin;
import React,{useState,useffect}来自“React”;
从“./api”导入{registerUser};
常量管理=()=>{
const admin=localStorage.getItem(“admin”);
const[user,setUser]=useState(“”);
const[password,setPassword]=useState(“”);
const[email,setEmail]=useState(“”);
const handleSubmit=(事件)=>{
event.preventDefault();
控制台日志(用户、密码、电子邮件);
取消课程();
};
const cancelCourse=()=>{
setUser(“”);
设置密码(“”);
setEmail(“”);
};
如果(!admin){
返回您没有访问权限;
}否则{
返回(
创建用户
提交
);
}
};
导出默认管理员;
使用e=>setUser(e.target.value)代替setUser等
所以你的代码是
import React, { useState, useEffect } from "react";
import { registerUser } from "../api";
const Admin = () => {
const admin = localStorage.getItem("admin");
const [user, setUser] = useState("");
const [password, setPassword] = useState("");
const [email, setEmail] = useState("");
const handleSubmit = (event) => {
event.preventDefault();
console.log(user, password, email);
cancelCourse();
};
const cancelCourse = () => {
setUser("");
setPassword("");
setEmail("");
};
if (!admin) {
return <div className="pleaselogin">You do not have access</div>;
} else {
return (
<div className="page">
<form id="create">
<div>Create User</div>
<input
className="form-input"
id="name"
placeholder="Enter User's Name"
onChange={e => setUser(e.target.value)}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Password"
onChange={e => setPassword(e.target.value)}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Email"
onChange={e => setEmail(e.target.value)}
></input>
<button className="submit" onClick={handleSubmit}>
Submit
</button>
</form>
</div>
);
}
};
export default Admin;
import React,{useState,useffect}来自“React”;
从“./api”导入{registerUser};
常量管理=()=>{
const admin=localStorage.getItem(“admin”);
const[user,setUser]=useState(“”);
const[password,setPassword]=useState(“”);
const[email,setEmail]=useState(“”);
const handleSubmit=(事件)=>{
event.preventDefault();
控制台日志(用户、密码、电子邮件);
取消课程();
};
const cancelCourse=()=>{
setUser(“”);
设置密码(“”);
setEmail(“”);
};
如果(!admin){
返回您没有访问权限;
}否则{
返回(
创建用户
setUser(e.target.value)}
>
setPassword(e.target.value)}
>
setEmail(e.target.value)}
>
提交
);
}
};
导出默认管理员;
使用e=>setUser(e.target.value)代替setUser等
所以你的代码是
import React, { useState, useEffect } from "react";
import { registerUser } from "../api";
const Admin = () => {
const admin = localStorage.getItem("admin");
const [user, setUser] = useState("");
const [password, setPassword] = useState("");
const [email, setEmail] = useState("");
const handleSubmit = (event) => {
event.preventDefault();
console.log(user, password, email);
cancelCourse();
};
const cancelCourse = () => {
setUser("");
setPassword("");
setEmail("");
};
if (!admin) {
return <div className="pleaselogin">You do not have access</div>;
} else {
return (
<div className="page">
<form id="create">
<div>Create User</div>
<input
className="form-input"
id="name"
placeholder="Enter User's Name"
onChange={e => setUser(e.target.value)}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Password"
onChange={e => setPassword(e.target.value)}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Email"
onChange={e => setEmail(e.target.value)}
></input>
<button className="submit" onClick={handleSubmit}>
Submit
</button>
</form>
</div>
);
}
};
export default Admin;
import React,{useState,useffect}来自“React”;
从“./api”导入{registerUser};
常量管理=()=>{
const admin=localStorage.getItem(“admin”);
const[user,setUser]=useState(“”);
const[password,setPassword]=useState(“”);
const[email,setEmail]=useState(“”);
const handleSubmit=(事件)=>{
event.preventDefault();
控制台日志(用户、密码、电子邮件);
取消课程();
};
const cancelCourse=()=>{
setUser(“”);
设置密码(“”);
setEmail(“”);
};
如果(!admin){
返回您没有访问权限;
}否则{
返回(
创建用户
setUser(e.target.value)}
>
setPassword(e.target.value)}
>
setEmail(e.target.value)}
>
提交
);
}
};
导出默认管理员;
您需要将呼叫更新为setUser
、setPassword
和setEmail
。对于当前代码,它无法设置useState
期望的准确值。需要设置如下内容:
setUser(event.target.value)}
/>
我已为您的参考创建了上。您需要将呼叫更新为
setUser
、setPassword
和setEmail
。对于当前代码,它无法设置useState
期望的准确值。需要设置如下内容:
setUser(event.target.value)}
/>
我已经为您的参考创建了。我在下面提取了一个愚蠢的工作代码
import React, { useState, useEffect } from "react";
import { registerUser } from "../api";
const Admin = () => {
const main = localStorage.getItem("admin");
const [user, setUser] = useState("");
const [password, setPassword] = useState("");
const [email, setEmail] = useState("");
const handleRegis = (event) => {
event.preventDefault();
// registerUser(user, password, email);
console.log(user, password, email);
cancelCourse();
};
const cancelCourse = () => {
setUser("");
setPassword("");
setEmail("");
};
const changeUser = (event) => {
setUser(event.target.value);
};
const changePassword = (event) => {
setPassword(event.target.value);
};
const changeEmail = (event) => {
setEmail(event.target.value);
};
if (!main) {
return <div className="pleaselogin">You do not have access</div>;
} else {
return (
<div className="page">
<form id="create">
<div>Create User</div>
<input
className="form-input"
id="name"
placeholder="Enter User's Name"
value={user}
onChange={changeUser}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Password"
value={password}
onChange={changePassword}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Email"
value={email}
onChange={changeEmail}
></input>
<button className="submit" onClick={handleRegis}>
Submit
</button>
</form>
</div>
);
}
};
export default Admin;
import React,{useState,useffect}来自“React”;
从“./api”导入{registerUser};
常量管理=()=>{
const main=localStorage.getItem(“admin”);
const[user,setUser]=useState(“”);
const[password,setPassword]=useState(“”);
const[email,setEmail]=useState(“”);
常量handleRegis=(事件)=>{
event.preventDefault();
//注册者(用户、密码、电子邮件);
控制台日志(用户、密码、电子邮件);
取消课程();
};
const cancelCourse=()=>{
setUser(“”);
设置密码(“”);
setEmail(“”);
};
const changeUser=(事件)=>{
setUser(event.target.value);
};
const changePassword=(事件)=>{
设置密码(event.target.value);
};
常量更改电子邮件=(事件)=>{
setEmail(event.target.value);
};
如果(!main){
返回您没有访问权限;
}否则{
返回(
创建用户
提交
);
}
};
导出默认管理员;
我在下面提取了一个愚蠢的、有效的代码
import React, { useState, useEffect } from "react";
import { registerUser } from "../api";
const Admin = () => {
const main = localStorage.getItem("admin");
const [user, setUser] = useState("");
const [password, setPassword] = useState("");
const [email, setEmail] = useState("");
const handleRegis = (event) => {
event.preventDefault();
// registerUser(user, password, email);
console.log(user, password, email);
cancelCourse();
};
const cancelCourse = () => {
setUser("");
setPassword("");
setEmail("");
};
const changeUser = (event) => {
setUser(event.target.value);
};
const changePassword = (event) => {
setPassword(event.target.value);
};
const changeEmail = (event) => {
setEmail(event.target.value);
};
if (!main) {
return <div className="pleaselogin">You do not have access</div>;
} else {
return (
<div className="page">
<form id="create">
<div>Create User</div>
<input
className="form-input"
id="name"
placeholder="Enter User's Name"
value={user}
onChange={changeUser}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Password"
value={password}
onChange={changePassword}
></input>
<input
className="form-input"
id="name"
placeholder="Enter User's Email"
value={email}
onChange={changeEmail}
></input>
<button className="submit" onClick={handleRegis}>
Submit
</button>
</form>
</div>
);
}
};
export default Admin;
import React,{useState,useffect}来自“React”;
从“./api”导入{registerUser};
常量管理=()=>{
const main=localStorage.getItem(“admin”);
const[user,setUser]=useState(“”);
const[password,setPassword]=useState(“”);
const[email,setEmail]=useState(“”);
常量handleRegis=(事件)=>{
event.preventDefault();
//注册者(用户、密码、电子邮件);
控制台日志(用户、密码、电子邮件);
取消课程();
};
const cancelCourse=()=>{
setUser(“”);
设置密码(“”);
setEmail(“”);
};
const changeUser=(事件)=>{
setUser(event.target.value);
};
const changePassword=(事件)=>{
设置密码(event.target.value);
};
常量更改电子邮件=(事件)=>{
setEmail(event.target.value);
};
如果(!main)