javascript - 如何从当前时间 momentjs 中减去时间

Question

我有

const endTime = moment().format("HH:mm:ss");
const duration = moment.utc(request.input('duration') * 60000).format("HH:mm:ss");

我要计算

startTime = endTime - duration

Answer 1

endTime.subtract(duration);

应该可以解决问题，如果您想深入了解，这里是文档 docs

编辑:

const endTime = moment(); //now time
const duration = request.input('duration') //duration in miliseconds
let startTime = endTime.subtract(duration,'ms')

const endTime = moment(); //now time
const duration = 600000; //hardcoded 10 mins //duration in miliseconds
console.log(endTime)
let startTime = endTime.subtract(duration, 'ms')
console.log(startTime)

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.2.1/moment.min.js"></script>