In ES6 projects overflows console with typescript warning

Sorry, I don’t know how to demonstrate this on a JSFiddle, as I can’t see the console output there.

I do NOT use Typescript, but ES6 via Babel.

After upgrade from 4.2.0 to 4.2.1 (or any higher version) the project build and the browser console is overflown with 111 messages. This effectively prevents development of the app, as I need to have the console clean to easily spot any issues with my own code.

Browser console output:

[HMR] bundle has 111 warnings
./node_modules/flatpickr/dist/l10n/ar.d.ts
Module parse failed: /home/..../frontend/node_modules/flatpickr/dist/l10n/ar.d.ts Unexpected token (2:7)
You may need an appropriate loader to handle this file type.
| import { CustomLocale } from "../types/locale";
| export declare const Arabic: CustomLocale;
| declare const _default: {
|     ar?: CustomLocale | undefined;
 @ ./node_modules/flatpickr/dist/l10n ^\.\/.*$
 @ ./src/main.js
 @ multi ./build/dev-client ./src/main.js
./node_modules/flatpickr/dist/l10n/bg.d.ts
Module parse failed: /home/..../frontend/node_modules/flatpickr/dist/l10n/bg.d.ts Unexpected token (2:7)
You may need an appropriate loader to handle this file type.
| import { CustomLocale } from "../types/locale";
| export declare const Bulgarian: CustomLocale;
| declare const _default: {
|     ar?: CustomLocale | undefined;
 @ ./node_modules/flatpickr/dist/l10n ^\.\/.*$
 @ ./src/main.js
 @ multi ./build/dev-client ./src/main.js
./node_modules/flatpickr/dist/l10n/bn.d.ts
Module parse failed: /home/..../frontend/node_modules/flatpickr/dist/l10n/bn.d.ts Unexpected token (2:7)
You may need an appropriate loader to handle this file type.
| import { CustomLocale } from "../types/locale";
| export declare const Bangla: CustomLocale;
| declare const _default: {
|     ar?: CustomLocale | undefined;
 @ ./node_modules/flatpickr/dist/l10n ^\.\/.*$
 @ ./src/main.js
 @ multi ./build/dev-client ./src/main.js
./node_modules/flatpickr/dist/l10n/cat.d.ts
Module parse failed: /home/..../frontend/node_modules/flatpickr/dist/l10n/cat.d.ts Unexpected token (2:7)
You may need an appropriate loader to handle this file type.
| import { CustomLocale } from "../types/locale";
|

etc. the rest omitted.

I would assume that this is related to issue #1131 and commit 6b4ff17d7b0c33353413f391b90a56a7075c5cd9. (I might also speculate that maybe some dist JS files refer to .ts files?)

Please advise how to get rid of these messages.

Your Environment

• flatpickr version used: 4.2.1
• Browser name and version: Chrome
• OS and version: Centos 7.1

[ivos]

Just for the info, I have finally found the cause.

The require call for flatpickr locale assumed a .js extension will be added by webpack by default, but the .d.ts file was loaded as well. Changing it to this made the trick:

flatpickrLocaleImport = require(`flatpickr/dist/l10n/${locale}.js`).default[locale]

My bad.

[ivos]

Created a new plain project with just flatpickr and could not reproduce the issue. Probably something with the vue component wrapper. Sorry.