relative time plugin throws: asynchronous error TypeError: v is not a function

Describe the bug Trying to use relative time formatting for relative times less than a minute throws an error:

asynchronous error TypeError: v is not a function
    at Object.n.fromToBase (/Users/christophe.taylor/nurx/deploy/node_modules/dayjs/plugin/relativeTime.js:1:1086)
    at i (/Users/christophe.taylor/nurx/deploy/node_modules/dayjs/plugin/relativeTime.js:1:510)
    at M.n.from (/Users/christophe.taylor/nurx/deploy/node_modules/dayjs/plugin/relativeTime.js:1:1265)
    at Object.exports.app_status_table (/Users/christophe.taylor/nurx/deploy/lib/templates.js:190:23)
    at run (/Users/christophe.taylor/nurx/deploy/bin/build-deploy.js:240:32)

Expected behavior Expected to be rendered as less than a minute ago

Information dayjs v1.10.5 (also happened in v1.10.4)

const dayjs = require('dayjs');
const relativeTime = require('dayjs/plugin/relativeTime');

dayjs.extend(relativeTime, {
  thresholds: [
    { l: 's', r: 1 },
    { l: 'ss', r: 59, d: 'second' }, // ? 'ss' format does not exist on locale
    { l: 'm', r: 1 },
    { l: 'mm', r: 120, d: 'minute' },
    { l: 'h', r: 1 },
    { l: 'hh', r: 23, d: 'hour' },
    { l: 'd', r: 1 },
    { l: 'dd', r: 29, d: 'day' },
    { l: 'M', r: 1 },
    { l: 'MM', r: 11, d: 'month' },
    { l: 'y' },
    { l: 'yy', d: 'year' }
  ],
});

  const test_date = new Date().getTime() - 30000;
  console.log(dayjs(new Date(test_date)).fromNow(true)); // -> asynchronous error TypeError: v is not a function

[federaljules]

Got my issue solved. Not sure if it is related to this issue but it had a similar error message. In my case it was because I was updating only some of the default locale settings for relativeTime like this:

dayjs.updateLocale('en', {
	relativeTime: {
		d: '%d d',
		dd: '%d d',
		M: '%d mo.',
		MM: '%d mos.',
		y: '%d y',
		yy: '%d y',
	}
});

I figured out that if you don’t set ALL of the locale options for the relativeTime it will throw this error (or at least very similar error) when dayjs tries to use one of the relativeTime locale options that you didn’t set on updateLocale and doesn’t find it.

This is because updateLocale will replace the default relativeTime locale object with the object you set in the updateLocale. So for example in this case it would not have locale options for h, hh, s, ss etc.

The way I fixed this in my use case was to get the default relativeTime locale values and just spread those and update the ones I need to update.

const localeList = dayjs.Ls;

dayjs.updateLocale('en', {
	relativeTime: {
		...localeList['en'].relativeTime,
		d: '%d d',
		dd: '%d d',
		M: '%d mo.',
		MM: '%d mos.',
		y: '%d y',
		yy: '%d y',
	}
});

Hope this helps someone else as well.

[federaljules]

Also facing this issue