Claim: Canvas can log that a quiz page lost focus, but it cannot see the name, URL, or contents of the tab you switched to.
Evidence
Browser event
Quiz pages can listen for focus, blur, and visibility changes inside their own tab.
Teacher view
Timeline entry
The teacher-facing wording is usually similar to Stopped viewing the Canvas quiz-taking page.
Limit
No destination data
The event says the Canvas page lost focus. It does not reveal Google, ChatGPT, Discord, a PDF, or another tab URL.
Student view vs teacher view
| Student action | What Canvas can record | What it cannot record |
|---|---|---|
| Switch to another tab | Focus loss timestamp | The other tab name, URL, or content |
| Click another app | Window blur/focus timeline | Which app you clicked |
| Look at another monitor without clicking | Usually nothing | Eye movement or screen layout |
Test the boundary yourself with the Canvas Tracking Test or see the teacher-facing version in the Professor View Simulator.