topic Error when using moment.js in Developer

Error when using moment.js

mrtn — Tue, 25 Feb 2020 10:57:52 GMT

I am trying to use moment.js when creating a custom visual, but get the following error:

Module not found: Error: Can't resolve './locale' in 'F:\XXXXX\.tmp\build'

This appears to be linked to a know issue with moment.js, but none of the workarounds suggested online works. Any hints on how to resolve this when developing a custom visual?

Re: Error when using moment.js

dm-p — Tue, 25 Feb 2020 21:24:08 GMT

Hi @mrtn,

I've been able to get this to work through the usual means by setting up a new custom visual on SDK v3. My steps as follows:

Install moment.js into your project as a dependency, i.e.:

npm i moment

Including in my visual.ts, e.g.:

import * as moment from 'moment';

And then doing a quick sanity test in my visual constructor, e.g.:

/** Object exists? */ console.log(moment()); /** Should return 'en' */ console.log(moment().locale()); /** Display day of week */ console.log(moment().format('dddd')); /** Test additional locale for day of week */ console.log(moment().locale('de').format('dddd'));

And I get this in my browser console (confirming moment is accessible):

If this doesn't work for you we might need to know a bit more about your situation. Are you able to share any code that reproduces the issue for you? If so, it would be useful to get a copy of your package.json (for dependencies) and pbiviz.json (for API version), just so I can verify if there are some specific issues with the combination of how these are set up in conjunction with your code.

Regards,

Daniel

Re: Error when using moment.js

mrtn — Thu, 27 Feb 2020 14:38:44 GMT

@dm-p Hi Daniel, I followed your suggested steps, moment works just fine when creating a new project.

The issue appears to be related to incompabilities in old packages, as the project is non es2015 and was created on api v1.12. I am fine with sharing anything if you have the time to look into these legacy issues.

I have inherited this project and the issues from someone else.

Re: Error when using moment.js

mrtn — Tue, 03 Mar 2020 10:01:21 GMT

Hi,

fixed the issue by migrating the project to the latest API.

Found the description here somewhat helpful, although incomplete.

https://microsoft.github.io/PowerBI-visuals/docs/how-to-guide/migrating-to-powerbi-visuals-tools-3-0/