CEP Extension: Modifier Keys Not Detected in After Effects latest versions!

Report · Dec 03, 2025

I have a CEP extension panel where Alt+Click and Shift+Alt+Click detect correctly in AE 2023,2024 but not in AE2025.

```javascript

// Global key tracking

var isAltPressed = false;

document.addEventListener('keydown', function(e) {

if (e.key === 'Alt' || e.keyCode === 18) {

isAltPressed = true;

}

});

// Button event

document.getElementById('applyBtn').addEventListener('click', function(e) {

const useCustomValues = isAltPressed; // Always false in AE 2025

// ... rest of code

});

```

I've Tried:

:white_heavy_check_mark: Tracking Alt key state globally with keydown/keyup

:white_heavy_check_mark: Using `e.altKey`, `e.shiftKey` in click events

:white_heavy_check_mark: Tried Shift+Alt combination instead of just Alt

:white_heavy_check_mark: Updated manifest.xml CEP version from 10.0 to 11.0

:white_heavy_check_mark: Added visual debug indicator (doesn't show in AE 2025)

Result:

AE 2023: Works perfectly :white_heavy_check_mark:

AE 2025: Keys never detected :cross_mark:

manifest.xml

```xml

```

Is there a known issue with keyboard event capture in AE 2025 CEP panels? Has Adobe changed how modifier keys are intercepted?

Any workarounds or solutions would be greatly appreciated!