使用React进行Formik，Yup密码强度验证

Question

我对React还是很陌生，我有一个注册页面，其中有一个要使用正则表达式验证的密码字段。

我正在使用Formik和Yup进行验证，但是遇到错误，当我在“密码”字段中键入内容时，长度函数被调用的属性未定义。

是的，在yup中有一个名为“ matches”的功能，我正试图利用该功能来检查正则表达式。那就是当我得到这个错误。我删除了此验证，然后将其他验证设置为密码字段即可正常工作。

以下是SignUp.js文件的代码：-

import React from "react";
import Button from "react-bootstrap/Button";
import Form from "react-bootstrap/Form";
import "./SignUp.css";
import * as yup from "yup";
import { Formik } from "formik";

const schema = yup.object({
  username: yup.string().required('Please Enter a username'),
  email: yup
    .string()
    .email()
    .required('Please Enter your Email'),
  confirmEmail: yup
    .string()
    .email()
    .required()
    .oneOf([yup.ref("email"), null], "Emails must match"),
  password: yup
    .string()
    .required('Please Enter your password')
    .matches(
      "^(?=.*[A-Za-z])(?=.*d)(?=.*[@$!%*#?&])[A-Za-zd@$!%*#?&]{8,}$",
      "Must Contain 8 Characters, One Uppercase, One Lowercase, One Number and one special case Character"
    ),
  confirmPassword: yup
    .string()
    .required()
    .oneOf([yup.ref("password"), null], "Passwords must match")
});

const SignUp = props => {
  return (
    <Formik
    validationSchema={schema}
    onSubmit={console.log}
    initialValues={{
      username: "",
      email : "",
      confirmEmail : "",
      password: "",
      confirmPassword : ""
    }}
  >
  {({
    handleSubmit,
    handleChange,
    handleBlur,
    values,
    touched,
    isValid,
    errors,
  }) => (
    <div className="SignUpForm">
      <h1 className="SignInHeading">SIGN UP</h1>
      <Form noValidate onSubmit={handleSubmit}>
        <Form.Group controlId="formBasicUserName">
          <Form.Control
            size="lg"
            className="SignUpFormControls"
            type="text"
            name="username"
            value={values.username}
            onChange={handleChange}
            placeholder="Username"
            isInvalid={!!errors.username}
          />
          <Form.Control.Feedback className="FeedBack" type="invalid">
          {errors.username}
        </Form.Control.Feedback>
        </Form.Group>

        <Form.Group controlId="formBasicEmail">
          <Form.Control
            type="email"
            placeholder="Email"
            value={values.email}
            onChange={handleChange}
            name="email"
            className="SignUpFormControls"
            size="lg"
            isInvalid={!!errors.email}
          />
          <Form.Control.Feedback className="FeedBack" type="invalid">
          {errors.email}
        </Form.Control.Feedback>
        </Form.Group>

        <Form.Group controlId="formBasicConfirmEmail">
          <Form.Control
            type="email"
            className="SignUpFormControls"
            size="lg"
            name="confirmEmail"
            value = {values.confirmEmail}
            onChange={handleChange}
            placeholder="Confirm Email"
            isInvalid={!!errors.confirmEmail}
          />
          <Form.Control.Feedback className="FeedBack" type="invalid">
          {errors.confirmEmail}
        </Form.Control.Feedback>
        </Form.Group>

        <Form.Group controlId="formBasicPassword">
          <Form.Control
            className="SignUpFormControls"
            size="lg"
            type="password"
            name="password"
            value={values.password}
            onChange={handleChange}
            placeholder="Password"
            isInvalid={!!errors.password}
          />
          <Form.Control.Feedback className="FeedBack" type="invalid">
          {errors.password}
        </Form.Control.Feedback>
        </Form.Group>

        <Form.Group controlId="formBasicConfirmPassword">
          <Form.Control
            className="SignUpFormControls"
            size="lg"
            name="confirmPassword"
            onChange={handleChange}
            type="password"
            value={values.confirmPassword}
            placeholder="Confirm Password"
            isInvalid={!!errors.confirmPassword}
          /><Form.Control.Feedback className="FeedBack" type="invalid">
          {errors.confirmPassword}
        </Form.Control.Feedback>
        </Form.Group>

        <Button variant="primary" className="SignUpButton" type="submit">
          Sign Up
        </Button>
        <Form.Text>
          Already a User?{" "}
          <a href="#signin" onClick={props.toggle}>
            Sign In
          </a>
        </Form.Text>
      </Form>
    </div>)}
    </Formik>
  );
};

export default SignUp;

这是Chrome控制台中的错误：-

formik.esm.js:721 Uncaught (in promise) TypeError: Cannot read property 'length' of undefined
    at yupToFormErrors (formik.esm.js:721)
    at formik.esm.js:276

Answer 1

这就是我最终开始工作的原因。

 password: Yup.string()
          .required('Please Enter your password')
          .matches(

            /^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#\$%\^&\*])(?=.{8,})/,
            "Must Contain 8 Characters, One Uppercase, One Lowercase, One Number and One Special Case Character"
          ),

我从这篇文章中获取了这个正则表达式字符串：https : //www.thepolyglotdeveloper.com/2015/05/use-regex-to-test-password-strength-in-javascript/

Answer 2

您需要将实际的RegExp对象传递给matches，而不是字符串。只需在密码架构中用正斜杠替换双引号即可：

password: yup
    .string()
    .required('Please Enter your password')
    .matches(
      /^(?=.*[A-Za-z])(?=.*d)(?=.*[@$!%*#?&])[A-Za-zd@$!%*#?&]{8,}$/,
      "Must Contain 8 Characters, One Uppercase, One Lowercase, One Number and one special case Character"
    ),

Answer 3

好的，经过几个小时的摆弄，我决定改为进行我自己的自定义验证。

这是我所做的：-

password: yup
    .string()
    .required("Please Enter your password")
    .test(
      "regex",
      "Password must be min 8 characters, and have 1 Special Character, 1 Uppercase, 1 Number and 1 Lowercase",
      val => {
        let regExp = new RegExp(
          "^(?=.*\\d)(?=.*[!@#$%^&*])(?=.*[a-z])(?=.*[A-Z]).{8,}$"
        );
        console.log(regExp.test(val), regExp, val);
        return regExp.test(val);
      }
    )

目前，这工作正常。但我真的很想知道为什么会出现错误。如果您能够找到解决方案，请将其发布为答案，如果它对我有用，我会将其标记为正确答案。谢谢。

Answer 4

您可以按如下方式处理各个错误消息。

password: yup.string().min(8, "Must Contain 8 Characters").required()
    .matches(
      /^(?=.*[a-z])/,
      " Must Contain One Lowercase Character"
    )
    .matches(
      /^(?=.*[A-Z])/,
      "  Must Contain One Uppercase Character"
    )
    .matches(
      /^(?=.*[0-9])/,
      "  Must Contain One Number Character"
    )
    .matches(
      /^(?=.*[!@#\$%\^&\*])/,
      "  Must Contain  One Special Case Character"
    ),