在 TypeScript 中实现表单验证可以使用一些常见的方法,例如:
interface FormData {
username: string;
email: string;
password: string;
}
const formData: FormData = {
username: 'john_doe',
email: 'john_doe@example.com',
password: 'password123'
};
function handleSubmit(data: FormData) {
if (!data.username || !data.email || !data.password) {
console.error('Please fill out all fields');
return;
}
// Submit the form data
}
function validateEmail(email: string): boolean {
const emailRegex = /^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/;
return emailRegex.test(email);
}
if (!validateEmail(formData.email)) {
console.error('Invalid email address');
}
// 可以根据需要定义其他验证规则和函数
react-hook-form
、Formik
等库来处理表单验证逻辑:import { useForm } from 'react-hook-form';
function FormComponent() {
const { register, handleSubmit, errors } = useForm();
const onSubmit = (data: FormData) => {
// Handle form submission
};
return (
<form onSubmit={handleSubmit(onSubmit)}>
<input type="text" name="username" ref={register({ required: true })} />
{errors.username && <span>Username is required</span>}
<input type="email" name="email" ref={register({ required: true })} />
{errors.email && <span>Email is required</span}
<input type="password" name="password" ref={register({ required: true })} />
{errors.password && <span>Password is required</span}
<button type="submit">Submit</button>
</form>
);
}
这些是一些常见的在 TypeScript 中实现表单验证的方法,具体实现方式可以根据项目需求和个人喜好进行调整和扩展。
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