这是我的第一个堆栈溢出问题。我正在尝试构建一个登录页面(使用 node express mongodb mongoose 制作一个完整的堆栈应用程序)并且前端是 REACT。我遇到了一个问题,在我单击输入字段并单击退出之前,输入字段 css 不会注册。我正在使用 Formik 来开发我的表单。我基本上有两个问题:如何解决此问题以及如何对在 localhost:3003 上运行的后端服务器进行 API 调用。这是代码:
import React from "react";
import "../App.css";
import { Formik } from "formik";
import * as EmailValidator from "email-validator";
import * as Yup from "yup";
const ValidatedLoginForm = () => (
<Formik
initialValues={{ email: "", password: "" }}
onSubmit={(values, { setSubmitting }) => {
setTimeout(() => {
console.log("Logging in", values);
setSubmitting(false);
}, 500);
}}
validationSchema={Yup.object().shape({
email: Yup.string()
.email()
.required("Required"),
password: Yup.string()
.required("No password provided.")
.min(8, "Password is too short - should be 8 chars minimum.")
.matches(/(?=.*[0-9])/, "Password must contain a number.")
})}
>
{props => {
const {
values,
touched,
errors,
isSubmitting,
handleChange,
handleBlur,
handleSubmit
} = props;
return (
<div className="FormCenter">
<form onSubmit={handleSubmit} className="FormFields">
<div className="FormField">
<label htmlFor="email" className="FormField__Label">
Email
</label>
<input
name="email"
type="text"
placeholder="Enter your email"
value={values.email}
onBlur={handleBlur}
onChange={handleChange}
className={
errors.email && touched.email && "error" && "FormField__Input"
}
/>
{errors.email && touched.email && (
<div className="input-feedback">{errors.email}</div>
)}
</div>
<div className="FormField">
<label htmlFor="email" className="FormField__Label">
Password
</label>
<input
name="password"
type="password"
placeholder="Enter your password"
value={values.password}
onChange={handleChange}
onBlur={handleBlur}
className={
errors.password &&
touched.password &&
"error" &&
"FormField__Input"
}
/>
{errors.password && touched.password && (
<div className="input-feedback">{errors.password}</div>
)}
</div>
<div className="FormField">
<button
type="submit"
className="FormField__Button mr-20"
onChange
>
Login
</button>
</div>
</form>
</div>
);
}}
</Formik>
);
export default ValidatedLoginForm;