代码片段 - JavaScript 求时间差

// 求时间差1（时间差不能超过一天）
function timeDifference1(startTime, endTime) {
	let times = endTime.getTime() - startTime.getTime()
	// fix: 1970-1-1 08:00:00 (28800000 = 8*60*60*1000)
	return new Date(times - 28800000)
}

// 求时间差2（时间差任意）
function timeDifference2(startTime, endTime) {
    let times = endTime.getTime() - startTime.getTime()
    let hours = Math.floor(times / 3600000)
    times %= 3600000
    let minutes = Math.floor(times / 60000)
    times %= 60000
    let seconds = Math.floor(times / 1000)
    return {hours: hours, minutes: minutes, seconds: seconds}
}

// 测试
let time1 = new Date(0)
let time2 = new Date(1970,0,1,15,30,45)

console.log(time1)
console.log(time2)

let times1 = timeDifference1(time1, time2)
let text1 = `${times1.getHours()}:${times1.getMinutes()}:${times1.getSeconds()}`
console.log(`时间差:${text1}`)

let times2 = timeDifference2(time1, time2)
let text2 = `${times2.hours}:${times2.minutes}:${times2.seconds}`
console.log(`时间差:${text2}`)