js 转换时间为String

let date = new Date();
console.log(date.toString()); // 输出类似 "Wed Oct 05 2023 14:30:00 GMT+0800 (China Standard Time)"

let date = new Date();
console.log(date.toDateString()); // 输出类似 "Wed Oct 05 2023"

let date = new Date();
console.log(date.toISOString()); // 输出类似 "2023-10-05T14:30:00.000Z"

let date = new Date();
console.log(date.toLocaleString()); // 输出根据浏览器设置可能不同，如 "10/5/2023, 2:30:00 PM"

function formatDate(date) {
    let year = date.getFullYear();
    let month = ('0' + (date.getMonth() + 1)).slice(-2); // 月份从0开始
    let day = ('0' + date.getDate()).slice(-2);
    let hours = ('0' + date.getHours()).slice(-2);
    let minutes = ('0' + date.getMinutes()).slice(-2);
    let seconds = ('0' + date.getSeconds()).slice(-2);
    
    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
}

let date = new Date();
console.log(formatDate(date)); // 输出类似 "2023-10-05 14:30:00"