bug: Datetime UI does not update the value after it has changed programmatically.

[NormanV41]

Prerequisites

• I have read the Contributing Guidelines.
• I agree to follow the Code of Conduct.
• I have searched for existing issues that already report this problem, without success.

Ionic Framework Version

• v4.x
• v5.x
• v6.x

Current Behavior

Datetime UI does not show that the value has changed after it changed programmatically. This issue is unique for version 6.

Expected Behavior

The Datetime UI should be updated when its value changes programmatically.

Steps to Reproduce

• Start a new app with a blank template.
• add a Datetime component with its value bound to a component property.
• asynchronously update the value of the component property.
• observe that the UI does not show that the value has changed.

Code Reproduction URL

https://github.com/NormanV41/ionic-issues-demo/tree/datetime-issue-v6

Ionic Info

[WARN] Error loading @capacitor/ios package.json: Error: Cannot find module '@capacitor/ios/package'

   Require stack:
   - /usr/lib/node_modules/@ionic/cli/lib/project/index.js
   - /usr/lib/node_modules/@ionic/cli/lib/index.js
   - /usr/lib/node_modules/@ionic/cli/index.js
   - /usr/lib/node_modules/@ionic/cli/bin/ionic

[WARN] Error loading @capacitor/android package.json: Error: Cannot find module '@capacitor/android/package'

   Require stack:
   - /usr/lib/node_modules/@ionic/cli/lib/project/index.js
   - /usr/lib/node_modules/@ionic/cli/lib/index.js
   - /usr/lib/node_modules/@ionic/cli/index.js
   - /usr/lib/node_modules/@ionic/cli/bin/ionic

Ionic:

Ionic CLI : 6.18.0 (/usr/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 6.0.0-rc.3
@angular-devkit/build-angular : 12.1.4
@angular-devkit/schematics : 12.1.4
@angular/cli : 12.1.4
@ionic/angular-toolkit : 4.0.0

Capacitor:

Capacitor CLI : 3.2.5
@capacitor/android : not installed
@capacitor/core : 3.2.5
@capacitor/ios : not installed

Utility:

cordova-res : 0.15.3
native-run : 1.5.0

System:

NodeJS : v14.16.1 (/usr/bin/node)
npm : 6.14.12
OS : Linux 5.14

Additional Information

No response

[sean-perkins]

@NormanV41 thanks for reporting this issue 👍

I've confirmed on your reproduction branch that this is an active issue. The internal value of the ion-datetime does update to the new value. You can bind to (ionChange) to see the value is emitted on change.

However, it appears the visual state does not re-render correctly; specifically around the active day (activeParts).

[sean-perkins]

This issue has been resolved and will be available in the next release 🎉

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.