我用的是官方Semantic UI React组件来创建 Web 应用程序。我的注册页面上有一个表单，其中包含一个电子邮件字段、一个密码字段和一个确认密码字段。

import {Component} from 'react';
import {Button, Form, Message} from 'semantic-ui-react';
import {signUp} from '../../actions/auth';

class SignUp extends Component {
    constructor(props) {
        super(props);
        this.handleSubmit = this.handleSubmit.bind(this);
    }
    handleSubmit(e, {formData}) {
        e.preventDefault();

        //
        // Potentially need to manually validate fields here?
        //

        // Send a POST request to the server with the formData
        this.props.dispatch(signUp(formData)).then(({isAuthenticated}) => {
            if (isAuthenticated) {
                // Redirect to the home page if the user is authenticated
                this.props.router.push('/');
            }
        }
    }
    render() {
        const {err} = this.props;

        return (
            <Form onSubmit={this.handleSubmit} error={Boolean(err)}>
                <Form.Input label="Email" name="email" type="text"/>
                <Form.Input label="Password" name="password" type="password"/>
                <Form.Input label="Confirm Password" name="confirmPassword" type="password"/>

                {err &&
                    <Message header="Error" content={err.message} error/>
                }

                <Button size="huge" type="submit" primary>Sign Up</Button>
            </Form>
        );
    }
}

现在，我已经习惯了常规的语义 UI 库，它有一个 Form Validation addon .通常，我会在单独的 JavaScript 文件中定义这样的规则

$('.ui.form').form({
    fields: {
        email: {
            identifier: 'email',
            rules: [{
                type: 'empty',
                prompt: 'Please enter your email address'
            }, {
                type: 'regExp',
                value: "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?",
                prompt: 'Please enter a valid email address'
            }]
        },
        password: {
            identifier: 'password',
            rules: [{
                type: 'empty',
                prompt: 'Please enter your password'
            }, {
                type: 'minLength[8]',
                prompt: 'Your password must be at least {ruleValue} characters'
            }]
        },
        confirmPassword: {
            identifier: 'confirmPassword',
            rules: [{
                type: 'match[password]',
                prompt: 'The password you provided does not match'
            }]
        }
    }
});

是否有类似的方法使用语义 UI React 组件来验证表单？我搜索了文档但没有成功，而且似乎没有使用这个 Semantic UI React 库进行验证的示例。

我是否需要在 handleSubmit 函数中手动验证每个字段？解决此问题的最佳方法是什么？感谢您的帮助!

最佳答案

在大多数情况下，您必须手动验证表单。然而，RSUI 包含一些工具可以让事情变得更简单，特别是 <Form> 上的错误属性。和 <Form.Input>

这是我最近整理的一个表格示例。它可以使用一些重构，但它基本上是通过将每个输入与状态绑定(bind) onChange() 来工作的。函数，并将回调传递给提交函数，该函数控制加载屏幕的可见性和表单的“成功。感谢您提交”部分。

export default class MeetingFormModal extends Component {

  constructor(props) {
    super(props)

    this.state = {
      firstName: '',
      lastName: '',
      email: '',
      location: '',
      firstNameError: false,
      lastNameError: false,
      emailError: false,
      locationError: false,
      formError: false,
      errorMessage: 'Please complete all required fields.',
      complete: false,
      modalOpen: false
    }

    this.submitMeetingForm = this.submitMeetingForm.bind(this);
    this.successCallback = this.successCallback.bind(this);
  }


  successCallback() {
    this.setState({
      complete: true
    })
    setTimeout( () => {this.setState({modalOpen: false})}, 5000);
    this.props.hideLoading();
  }

  handleClose = () => this.setState({ modalOpen: false })
  handleOpen = () => this.setState({ modalOpen: true })

  submitMeetingForm() {

    let error = false;

    if (this.state.studentFirstName === '') {
      this.setState({firstNameError: true})
      error = true
    } else {
      this.setState({firstNameError: false})
      error = false
    }
    if (this.state.studentLastName === '') {
      this.setState({lastNameError: true})
      error = true
    } else {
      this.setState({lastNameError: false})
      error = false
    }
    if (this.state.email === '') {
      this.setState({emailError: true})
      error = true
    } else {
      this.setState({emailError: false})
      error = false
    }
    if (this.state.location === '') {
      this.setState({locationError: true})
      error = true
    } else {
      this.setState({locationError: false})
      error = false
    }

    if (error) {
      this.setState({formError: true})
      return
    } else {
      this.setState({formError: false})
    }


    let meeting = {
      first_name: this.state.firstName,
      last_name: this.state.lastName,
      email: this.state.email,
      location: this.state.location,

    this.props.createMeeting(meeting, this.successCallback)
    this.props.showLoading();
  }

  capitalize(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
  }

  render() {
    return(
      <Modal
        trigger={<Button onClick={this.handleOpen} basic color='blue'>Schedule Now</Button>}
        open={this.state.modalOpen}
        onClose={this.handleClose}
        closeIcon={true}
      >
        <Modal.Header>Schedule Your Interview</Modal.Header>
        <Modal.Content>
          {!this.state.complete ?
          <Modal.Description>
            <Form error={this.state.formError}>
              <Form.Group widths='equal'>
                <Form.Field>
                  <Form.Input required={true} onChange={(e) => this.setState({firstName: e.target.value})} label='First Name' placeholder="First Name..." error={this.state.firstNameError}/>
                </Form.Field>
                <Form.Field>
                  <Form.Input required={true} onChange={(e) => this.setState({lastName: e.target.value})} label='Last Name' placeholder="Last Name..." error={this.state.lastNameError}/>
                </Form.Field>
              </Form.Group>
              <Form.Field >
                <Form.Input required={true} onChange={(e) => this.setState({email: e.target.value})} label='Email' placeholder="Email..." error={this.state.emailError}/>
              </Form.Field>
              <Form.Field>
                <Form.Input required={true} onChange={(e) => this.setState({location: e.target.value})} label='Location' placeholder='City, State/Province, Country...' error={this.state.locationError}/>
              </Form.Field>
            </Form>
          </Modal.Description>
          : 
            <div className='modal-complete'>
              <Image src='/images/check.png' />
              <p>Thanks for scheduling a meeting, {this.capitalize(this.state.name)}. We've received your information and we'll be in touch shortly.</p>
            </div>
          }
        </Modal.Content>
        {!this.state.complete ?
        <Modal.Actions>
          <Button color='red' onClick={this.handleClose}>Close</Button>
          <Button positive icon='checkmark' labelPosition='right' content="Submit" onClick={this.submitMeetingForm} />
        </Modal.Actions>
        : null }
      </Modal>
    )
  }
}

希望对您有所帮助!

关于javascript - 使用 Semantic-UI-React 进行表单验证，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/41724225/