js 记录一次日期转换

转数字转数字必须

调用：formatTime(Number(time), 'Y-M-D h:m:s')

 

 

// 格式化日期，如月、日、时、分、秒保证为2位数
function formatNumber(n) {
n = n.toString()
return n[1] ? n : '0' + n;
}
// 参数number为毫秒时间戳，format为需要转换成的日期格式
function formatTime(number, format) {
let time = new Date(number)
let newArr = []
let formatArr = ['Y', 'M', 'D', 'h', 'm', 's']
newArr.push(time.getFullYear())
newArr.push(formatNumber(time.getMonth() + 1))
newArr.push(formatNumber(time.getDate()))

newArr.push(formatNumber(time.getHours()))
newArr.push(formatNumber(time.getMinutes()))
newArr.push(formatNumber(time.getSeconds()))

for (let i in newArr) {
format = format.replace(formatArr[i], newArr[i])
}
return format;
}