如何使用moment.js获取从当前月份到过去一个月的所有月份列表

Question

I'm trying to generate a list of months starting from April 2020 to a month in the past ( October 2019 ) using moment.js .

 const start = moment().startOf('month') const startMonth = moment('10-01-2019', 'MM-DD-YYYY').format('MMMM YYYY') const month = moment().startOf('month').format('MM') for (let i = 0; i < month; i++) { const m = start.subtract(1, 'month').format('MMMM YYYY') if (m === startMonth) { break; } console.log(m) }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js" integrity="sha256-5oApc/wMda1ntIEK4qoWJ4YItnV4fBHMwywunj8gPqc=" crossorigin="anonymous"></script>

I get only 5 months as a result. Could anyone please help?

Answer 1

Using isSameOrBefore()

 const start = moment().startOf('month') const end = moment('11-11-2019', 'MM-DD-YYYY') while (end.isSameOrBefore(start, 'month')) { console.log(start.format('MMMM YYYY')) start.subtract(1, 'month') }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js" integrity="sha256-5oApc/wMda1ntIEK4qoWJ4YItnV4fBHMwywunj8gPqc=" crossorigin="anonymous"></script>

Exclude current month

 const start = moment().startOf('month') const end = moment('11-11-2019', 'MM-DD-YYYY') while (end.isBefore(start, 'month')) { start.subtract(1, 'month') console.log(start.format('MMMM YYYY')) }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js" integrity="sha256-5oApc/wMda1ntIEK4qoWJ4YItnV4fBHMwywunj8gPqc=" crossorigin="anonymous"></script>

Answer 2

Something like this?

 const start = moment().startOf('month') const end = moment('10-01-2018', 'MM-DD-YYYY') let results = [] let current = start while (current.format('MMMM YYYY').== end.format('MMMM YYYY')) { results.push(current.format('MMMM YYYY')) current = current,subtract(1, 'month') } // need to add current one last time because the loop will have ended when it is equal to the end date. and will not have added it results.push(current.format('MMMM YYYY')) console.log(results)

 <script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.26.0/moment.min.js" integrity="sha256-5oApc/wMda1ntIEK4qoWJ4YItnV4fBHMwywunj8gPqc=" crossorigin="anonymous"></script>