Using of "dayjs/plugin/timezone" causes Uncaught TypeError: Cannot set property of undefined

[d-reznik]

Describe the bug
I have this small code where I try to use tz function:

import dayjs from 'dayjs';
import timeZone from "dayjs/plugin/timezone";
dayjs.extend(timeZone);

const currentTime = dayjs().tz("Europe/Copenhagen");

On the last line I get an error in Chrome console:

timezone.js?1953:1 Uncaught TypeError: Cannot set property '$timezone' of undefined

I tried to copy paste all the examples from documentation and non of timezone examples worked for me. Could you please tell me what am I doing wrong?

Expected behavior
Function tz can be used in my code.

Information

• Day.js Version v1.10.0/v1.10.3/v1.10.4
• OS: Win 10
• Browser chrome 87
• Time zone: GMT+02:00

[iamkun]

can you provide a reproduction repo?

[d-reznik]

can you provide a reproduction repo?

Thank you for reply!
Here is my repo to reproduce this issue: https://github.com/d-reznik/dayjs_repro
Next error happens in MainPage.vue component in property currentCopenhagenTime

Uncaught TypeError: Cannot set property '$timezone' of undefined
    at d.s.tz (timezone.js?1953:1)
    at Proxy.get (MainPage.vue?3552:17)
    at ComputedRefImpl.reactiveEffect [as effect] (reactivity.esm-bundler.js?a1e9:42)
    at ComputedRefImpl.get value [as value] (reactivity.esm-bundler.js?a1e9:827)
    at Object.get [as currentCopenhagenTime] (runtime-core.esm-bundler.js?5c40:5783)
    at Object.get (runtime-core.esm-bundler.js?5c40:6097)
    at Proxy.render (MainPage.vue?67f4:3)
    at renderComponentRoot (runtime-core.esm-bundler.js?5c40:710)
    at componentEffect (runtime-core.esm-bundler.js?5c40:4193)
    at reactiveEffect (reactivity.esm-bundler.js?a1e9:42)

[iamkun]

you can check the doc here https://day.js.org/docs/en/timezone/parsing-in-zone

Timezone plugin depends on utc plugin

[d-reznik]

you can check the doc here https://day.js.org/docs/en/timezone/parsing-in-zone

Timezone plugin depends on utc plugin

Thank you very much! This solved my problem!