bug: Ionic Gesture - mismatched gesture details in the last onMove handler and the onEnd handler.

[shepard-liu]

Prerequisites

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

Ionic Framework Version

v8.x

Current Behavior

Thank you for creating such a wonderful framework!

One can pass event handlers onMove and onEnd to the config object of createGesture(). These handlers are called with the details, such as deltaX and deltaY. The onMove handler fires regularly while the onEnd is called when the user interaction ends(typically on mouse up or touch end). In common cases, everything works pretty good. But the details passed to the two handlers mismatch if the user moves too fast, which causes the last part of changes to be unhandled because onEnd doesn't do what onMove does.

    const g = createGesture({
      direction: 'x',
      el: touchArea,
      onMove: ({ deltaX }) => {
        // manipulate styles of some elements, or set some states ...
        console.log("onMove:", deltaX)
      },
      onEnd: ({ deltaX }) => {
        // finalize and do some update ...
        console.log("onEnd:", deltaX)
      },
    });

Possible console output if user swipes fast enough:

onMove: 2
onMove: 6
onMove: 38
onMove: 110
onMove: 270
onMove: 532
onEnd: 1192

Sometimes this behavior confuses recruits like me. It would be better that the gesture package "flushes" a onMove before onEnd, although developers may simply call onMove inside onEnd themselves.

Expected Behavior

onMove gets called exactly before onEnd

Steps to Reproduce

See Reproduction on stackbliz. Swipe the page fast horizontally.

Code Reproduction URL

https://stackblitz.com/edit/vitejs-vite-ged8wu?file=src%2FApp.jsx

Ionic Info

Ionic:

Ionic CLI : 7.2.0 (C:\Users...\AppData\Roaming\nvm\v20.11.0\node_modules@ionic\cli) Ionic Framework : @ionic/react 8.2.7

Utility:

cordova-res : 0.15.4 native-run : 2.0.1

System:

NodeJS : v20.11.0 (C:\Program Files\nodejs\node.exe) npm : 10.2.4 OS : Windows 10

Additional Information

No response