Javascript 如何仅在触摸字段时显示错误?|反应&&;福米克
我有一张用React和Formik制作的表格。除了一个边缘的情况外,一切正常。我需要为电子邮件输入隐藏错误消息Javascript 如何仅在触摸字段时显示错误?|反应&&;福米克,javascript,reactjs,forms,validation,formik,Javascript,Reactjs,Forms,Validation,Formik,我有一张用React和Formik制作的表格。除了一个边缘的情况外,一切正常。我需要为电子邮件输入隐藏错误消息(关于错误的电子邮件地址),如果未按要求触摸它 问题: 用户认为需要发送电子邮件,即使这是一个完全无关的错误 我已经尝试在条件渲染中将字段设置为touch,因此,只有在触摸字段时才会出现错误。如下图所示: const emailValidation = (value, field) => { let emailErrorMessage; if (!/^[A-Z0-9._%+
(关于错误的电子邮件地址)
,如果未按要求触摸它
问题:
用户认为需要发送电子邮件,即使这是一个完全无关的错误
我已经尝试在条件渲染中将字段设置为touch,因此,只有在触摸字段时才会出现错误。如下图所示:
const emailValidation = (value, field) => {
let emailErrorMessage;
if (!/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value) && field.email.touched) {
emailErrorMessage = 'Invalid email address';
}
return emailErrorMessage;
};
那不行。我在代码的JSX部分也设置了它<代码>见下文:
const createUserValidationSchema = Yup.object().shape({
username: Yup.string('Provide a Username').required('Username is Required'),
email: Yup.string('Provide an email'),
password: Yup.string('Enter your password').required('Password is Required'),
confirmPassword: Yup.string('Enter your password again')
.required('Password Confirmation is Required')
.oneOf([Yup.ref('password')], 'Passwords do not match')
});
const emailValidation = (value, field) => {
let emailErrorMessage;
if (!/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value) && field.email.touched) {
emailErrorMessage = 'Invalid email address';
}
return emailErrorMessage;
};
class userValidation extends Component {
static propTypes = {
...formPropTypes,
username: PropTypes.string,
email: PropTypes.string,
password: PropTypes.string,
confirmPassword: PropTypes.string,
groupSelect: PropTypes.func
};
static defaultProps = {
email: ''
};
state = {
type: 'password',
};
render() {
const { type } = this.state;
return (
<div className="col-8">
<h3>Create User</h3>
<Formik
initialValues={{
username: '',
email: '',
password: '',
confirmPassword: ''
}}
validationSchema={createUserValidationSchema}
onSubmit={values => {
// same shape as initial values
console.log(values);
}}
>
{({ errors, touched }) => (
<Form>
<div className="my-3">
<label>
Username <span className="text-danger">*</span>
</label>
<Field name="username" type="text" className="form-control rounded-0" />
{errors.username && touched.username ? (
<div className="text-danger">{errors.username}</div>
) : null}
</div>
<div className="my-3">
<label>email</label>
<Field
name="email"
validate={emailValidation}
type="email"
className="form-control rounded-0"
/>
{errors.email && touched.email ? (
<div className="text-danger">{errors.email}</div>
) : null}
</div>
<div className="my-3">
<label>
Password <span className="text-danger">*</span>
</label>
<div className="d-flex align-items-center">
<Field type={type} name="password" className="form-control rounded-0 mr-2" />
<span
className={type === 'password' ? 'fa fa-eye fa-lg' : 'fa fa-eye-slash fa-lg'}
onClick={this.togglePasswordMask}
/>
</div>
{errors.password && touched.password ? (
<div className="text-danger">{errors.password}</div>
) : null}
</div>
<div className="my-3">
<label>
Confirm Password <span className="text-danger">*</span>
</label>
<Field name="confirmPassword" type={type} className="form-control rounded-0" />
{errors.confirmPassword && touched.confirmPassword ? (
<div className="text-danger">{errors.confirmPassword}</div>
) : null}
</div>
<button type="submit" className="btn btn-primary rounded-0 float-right my-3">
Create User
</button>
</Form>
)}
</Formik>
</div>
);
}
}
export default userValidation;
const createUserValidationSchema=Yup.object().shape({
用户名:Yup.string('提供用户名').required('需要用户名'),
email:Yup.string('provideanemail'),
密码:Yup.string('Enter your password')。必需('password is required'),
confirmPassword:Yup.string('再次输入密码')
.required('需要密码确认')
.oneOf([Yup.ref('password'),'Passwords not match')
});
常量emailValidation=(值,字段)=>{
让电子邮件发送错误消息;
如果(!/^[A-Z0-9.\%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i.test(value)和field.email.touch){
emailErrorMessage='无效的电子邮件地址';
}
返回emailErrorMessage;
};
类userValidation扩展了组件{
静态类型={
…形式类型,
用户名:PropTypes.string,
电子邮件:PropTypes.string,
密码:PropTypes.string,
confirmPassword:PropTypes.string,
groupSelect:PropTypes.func
};
静态defaultProps={
电子邮件:“”
};
状态={
键入:“密码”,
};
render(){
const{type}=this.state;
返回(
创建用户
{
//形状与初始值相同
console.log(值);
}}
>
{({错误,触摸})=>(
用户名*
{errors.username&&touch.username(
{errors.username}
):null}
电子邮件
{errors.email&&touch.email(
{errors.email}
):null}
密码*
{errors.password&&toucted.password(
{错误.密码}
):null}
确认密码*
{errors.confirmPassword&&touch.confirmPassword(
{错误。确认密码}
):null}
创建用户
)}
);
}
}
导出默认用户验证;
预期结果:
触摸字段后,仅显示无效电子邮件地址。如果我尝试提交,但没有提供电子邮件地址,则不会出现错误
当前结果:
出现错误,不允许我提交。您只能使用yup进行提交。您不需要额外的自定义验证
const createUserValidationSchema = Yup.object().shape({
email: Yup.string().email('Provide an email'),
....
});
是的,在填写电子邮件时对其进行验证,并允许提交带有空电子邮件字段的表单