js验证是否为日期

function isValidDate(dateString) {
    const date = new Date(dateString);
    return !isNaN(date.getTime());
}

// 使用示例
console.log(isValidDate("2023-10-05")); // true
console.log(isValidDate("2023/10/05")); // 根据环境可能为true或false
console.log(isValidDate("2023-13-01")); // false

function isValidDateFormat(dateString) {
    const regex = /^\d{4}-\d{2}-\d{2}$/;
    if (!regex.test(dateString)) return false;
    
    const parts = dateString.split("-");
    const year = parseInt(parts[0], 10);
    const month = parseInt(parts[1], 10);
    const day = parseInt(parts[2], 10);
    
    if (month < 1 || month > 12) return false;
    if (day < 1 || day > 31) return false;
    
    // 检查月份天数
    const monthDays = [31, (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0 ? 29 : 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    return day <= monthDays[month - 1];
}

// 使用示例
console.log(isValidDateFormat("2023-10-05")); // true
console.log(isValidDateFormat("2023-02-30")); // false
console.log(isValidDateFormat("2023-13-01")); // false

npm install date-fns

const { parseISO, isValid } = require('date-fns');

function isValidDateWithDateFns(dateString) {
    const date = parseISO(dateString);
    return isValid(date);
}

// 使用示例
console.log(isValidDateWithDateFns("2023-10-05")); // true
console.log(isValidDateWithDateFns("2023-02-30")); // false