js时间格式化精确到毫秒

/*** 数字前置补零* @param value 值* @param length 位数* @returns {string}*/
export function digit(value, length = 2) {if (typeof value === "undefined" ||value === null ||String(value).length >= length) {return value;}return (Array(length).join("0") + value).slice(-length);
}//格式化日期到毫秒
export function toDateString(time, format = "yyyy-MM-dd HH:mm:ss") {if (!time) {return "";}if (typeof time === "number" && String(time).length === 10) {time = time * 1000; // 10位时间戳处理}const date = new Date(time);const ymd = [digit(date.getFullYear(), 4),digit(date.getMonth() + 1),digit(date.getDate()),];const hms = [digit(date.getHours()),digit(date.getMinutes()),digit(date.getSeconds()),digit(date.getMilliseconds()),];return format.replace(/yyyy/g, ymd[0]).replace(/MM/g, ymd[1]).replace(/dd/g, ymd[2]).replace(/HH/g, hms[0]).replace(/mm/g, hms[1]).replace(/ss/g, hms[2]).replace(/SSS/g, hms[3]);
}