Moment ISO 弃用控制台警告

Question

I am facing the below warning,

Deprecation warning: value provided is not in a recognized ISO format. moment construction falls back to js Date(), which is not reliable across all browsers and versions. Non ISO date formats are discouraged and will be removed in an upcoming major release. Please refer to http://momentjs.com/guides/#/warnings/js-date/ for more info. Arguments: [0] _isAMomentObject: true, _isUTC: true, _useUTC: true, _l: undefined, _i: 2016-9-26 19:30, _f: undefined, _strict: undefined, _locale: [object Object]

When trying to do this using moment,

let startDate = "2022-11-29T11:30:00Z"
let currentDate = moment().format("MM-DD-YYYY HH:mm")

I need to find the difference between the startDate and currentDate in hours. So firstly i tried formatting startDate like this,

let formatStartDate = moment(startDate).format("MM-DD-YYYY HH:mm")

And tried finding diff like this,

let diffTime = moment(formatStartDate).diff(currentDate,"hours").

So, how should I refactor this code and get rid of that warning, any suggestions please?

Answer 1

You re-format the parsed start date right again and use the formatted string for the comparison. Remove the .format(...) calls altogether or move formatting to the latest possible place, if you need to print the time:

// set the current date in the IST timezone (+05:30)
let currentDate = moment().utcOffset(5*60 + 30);

// set the start date for comparison, also in IST timezone
let startDate = moment("2022-11-29T11:30:00Z").utcOffset(5*60 + 30);

// get the difference between the two as number in hours
let diffTime = startDate.diff(currentDate, "hours");

console.log(`There are ${diffTime} hours between ${startDate.format()}
and ${currentDate.format()}.`);