Angular-calendar: Some times calendar events are non-draggable after scrolling the window

[KirillTovpinets]

Hi.
I faced a bug with dragging calendar events.

Describe the bug
When the user add some events on calendar on week view and then scroll the window down and than scroll top, all the events on the calendar become non-draggable at all.

Minimal reproduction of the problem with instructions
To reproduce this bug, you should add some events on the week view calendar and then scroll the window down and up. After that, events become non-draggable

Screenshots
Here is a video how to reproduce the bug
https://monosnap.com/file/j2XRjh3dWvmxodqLgHqCf3d1WMaInz

Versions

• @angular/core: 8.2.6
• angular-calendar: 0.28.2
• Browser name and version: Chrome 81

[matts-bot[bot]]

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[mattlewis92]

Hey there, sorry to hear you're experiencing issues, please could you try upgrading to the latest version (0.28.13) as there have been a lot of fixes done around drag and drop in the last few versions. If you're still having troubles can you make a minimal repro on stackblitz or something that shows your problem. Thank you! 😄

[KirillTovpinets]

@mattlewis92, yea, all works now as expected, thank you. But unfortunately my ng build crashed with this errors.

ERROR in ./node_modules/angular-calendar/fesm2015/angular-calendar.js
Module build failed (from ./node_modules/@angular-devkit/build-optimizer/src/build-optimizer/webpack-loader.js):
TypeError: Cannot read property 'kind' of undefined
    at isAngularDecoratorMetadataExpression (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\transforms\scrub-file.js:230:35)
    at checkNodeForDecorators (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\transforms\scrub-file.js:53:21)
    at visitNodes (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:16631:30)
    at Object.forEachChild (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:16859:24)
    at transformer (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\transforms\scrub-file.js:39:16)
    at transformSourceFileOrBundle (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:67384:57)
    at transformation (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:83586:24)
    at transformRoot (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:83606:82)
    at Object.map (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:499:29)
    at Object.transformNodes (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:83593:30)
    at emitJsFileOrBundle (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:84089:32)
    at emitSourceFileOrBundle (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:84043:13)
    at forEachEmittedFile (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:83832:34)
    at Object.emitFiles (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:84026:9)
    at emitWorker (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:89951:33)
    at D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:89912:66
    at runWithCancellationToken (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:90002:24)
    at Object.emit (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\node_modules\typescript\lib\typescript.js:89912:20)
    at Object.transformJavascript (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\helpers\transform-javascript.js:111:13)
    at Object.buildOptimizer (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\build-optimizer\build-optimizer.js:119:35)
    at Object.buildOptimizerLoader (D:\Projects\Tempero\tempero-web\src\tempero-web\ClientApp\node_modules\@angular-devkit\build-optimizer\src\build-optimizer\webpack-loader.js:40:40)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build-app: `ng build --configuration=production`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] build-app script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\TovpinetsKA\AppData\Roaming\npm-cache\_logs\2020-05-07T13_06_37_587Z-debug.log

Here is my versions:

• "@angular/animations": "8.2.6",

• "@angular/cdk": "^7.3.3",

• "@angular/core": "8.2.6",
• "@angular-devkit/build-angular": "~0.803.4",

• "@angular-devkit/build-ng-packagr": "~0.803.4",

[KirillTovpinets]

Oh, I've just update @angular-devkit to 0.803.26 and this solved the problem. Thank you very much for help!

[mattlewis92]

Awesome, that's great to hear! 😄