js判断input值格式

function validateEmail(email) {
    const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return re.test(email);
}

const emailInput = document.getElementById('email');
if (!validateEmail(emailInput.value)) {
    alert('请输入有效的邮箱地址');
}

function validatePhone(phone) {
    const re = /^1[3-9]\d{9}$/;
    return re.test(phone);
}

const phoneInput = document.getElementById('phone');
if (!validatePhone(phoneInput.value)) {
    alert('请输入有效的手机号码');
}

function validateURL(url) {
    const re = /^(https?:\/\/)?([\da-z.-]+)\.([a-z.]{2,6})([/\w .-]*)*\/?$/;
    return re.test(url);
}

const urlInput = document.getElementById('url');
if (!validateURL(urlInput.value)) {
    alert('请输入有效的URL');
}

function validateNumber(number) {
    const re = /^\d+$/;
    return re.test(number);
}

const numberInput = document.getElementById('number');
if (!validateNumber(numberInput.value)) {
    alert('请输入有效的数字');
}

const re = /^[^\s@]+@[^\s@]+\.[^\s@]+$/; // 原始
const re = /^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/; // 放宽后