Event Log
Touchscreen diagnostics use browser pointer events locally for finger, stylus, and panel checks.
Touch Event Log: Pointer IDs, Pressure Values, Touch Timing, Input Type, And Browser Event Diagnostics
Inspect pointer event IDs, pressure, coordinates, event timing, and input type from touch devices.
What this test checks
- Touch point detection
- Coordinate accuracy and tracking gaps
- Stylus or finger input behavior
- Inspect Pressure And Coordinate Values
How to read the result
Event Log is most useful when you test the center, corners, and edges. Repeated misses in the same area matter more than a single bad tap, especially on phones, tablets, and touch laptops.
Generate Pointer Events
Tap, drag, hold, and release inside the field to populate the event table. Each row records phase, input type, pointer ID, pressure, and position.
Check Pointer IDs During Multi-Touch
When several fingers are placed on the screen, each contact should receive its own pointer ID. Missing IDs or changing IDs can make gestures and drawing apps behave unpredictably.
Inspect Pressure And Coordinate Values
Some devices report real stylus pressure while others return fixed values. The log helps users understand whether their browser and hardware expose pressure data at all.
Clear The Log Before Debugging A New Gesture
Resetting the event stream makes it easier to isolate one gesture, stylus stroke, or browser behavior. This is useful for developers, repair checks, and advanced touchscreen troubleshooting.
Related I/O Checkup Tools
What does Event Log measure?
Inspect pointer event IDs, pressure, coordinates, event timing, and input type from touch devices.
Do I need to install anything for Event Log?
No. Event Log runs directly in a modern browser. Some checks may ask for permission when they need camera, microphone, gamepad, pointer lock, touch, or audio output access.
Are results uploaded?
The test runs in your browser and uses local input events or browser hardware APIs for the visible diagnostics.
Why should I run related tests too?
Related tools help separate hardware issues from browser timing, display behavior, input device settings, or permission problems, which makes the final diagnosis more useful.
Detailed Testing Guide
Touch symptom
This touch page checks how the screen receives finger, stylus, or pointer contact in real browser events.
Start with a baseline run before changing device settings. Record any repeated symptom so the next comparison is useful.
Touch evidence
Watch contact location, missed areas, edge behavior, multi-touch count, line continuity, and pressure when supported.
Watch Touch point detection, Coordinate accuracy and tracking gaps, Stylus or finger input behavior, Inspect Pressure And Coordinate Values. These observations come from the browser; they do not reveal hidden firmware or factory calibration data.
Surface test method
Clean the glass, test the center first, then repeat suspicious corners, edges, or cells slowly.
Keep the test conditions stable. Changing browser, cable, port, lighting, surface, volume, grip, or selected device all at once makes the result harder to trust.
Result reading
Screen protectors, water, cases, palm rejection, and operating-system gestures can change the result.
A repeated pattern matters more than a single spike. When something looks wrong, confirm it with another pass and compare a related tool before deciding the device itself is defective.
Limits and next checks
Use touch point, multi-touch, dead zone, tap accuracy, drawing, edge, and event log pages as a sequence.
For a closer comparison, try Touchscreen Test, Multi-Touch Test, Tap Accuracy Test, Touch Dead Zone Test. Keep the same device and connection while you investigate the next symptom.