There are two ways to capture a browser state for debugging:
Watch it: Screenshots and session replays show you what the page looked like and what the user did. You observe the bug from a distance.
Inspect it: DOM snapshots give you the actual page state, opened in your browser, where you can use DevTools to inspect every element, check computed styles, and examine the data that was present at the moment of failure. You investigate the bug directly.
The gap between watching and inspecting is the gap between a 2-day investigation and a 15-minute fix.
What a DOM Snapshot Contains
A full DOM snapshot captures:
- The full HTML structure at the moment of capture — every element, every attribute, every class
- Computed styles — what the browser actually rendered, including inherited and computed values
- The data that was in the page — table cells, form values, dynamic content that was loaded
- Component state (for React and Vue apps) — props, state values, context values at the moment of capture
- Loaded resources — which scripts and styles were active, which had loaded and which hadn't
When you open a DOM snapshot in your browser, you get a fully functional inspection environment. DevTools works. You can right-click any element and inspect it. You can run queries against the DOM. You can check what value was in a specific element at the exact moment the user reported the bug.
A Concrete Example
A user reports: "The orders table shows no data."
With a screenshot, you see: the orders table is empty.
With a DOM snapshot, you open DevTools and inspect the table. You see: the table's <tbody> is empty but the component's loading state is false and the data prop is null. Immediately clear: the API returned null instead of an empty array, and the component renders nothing for null but doesn't show an empty state either.
That's a 30-second diagnosis. The screenshot gives you the same starting point a screenshot always gives you: "it looks empty." The DOM snapshot gives you the root cause.
DOM Snapshots vs. Session Replay
Session replay and DOM snapshots answer different questions:
Session replay answers: What did the user do? In what sequence? Where were they on the page?
DOM snapshot answers: What was the actual page state at the moment of the bug? What data was in it? What was the computed rendering?
Both are valuable. Session replay alone isn't enough for bugs caused by data issues. DOM snapshots alone don't show you the user's path. Together, they give you the complete picture.
The "Works on My Machine" Problem
The classic developer response to an unreproducible bug is "works on my machine." This is actually a bug report problem — not a developer problem. The developer genuinely can't reproduce the bug because they don't have the user's data, the user's state, the user's account configuration.
DOM snapshots eliminate this entirely. The developer doesn't need to reproduce the state — the state is packaged in the snapshot. They open it and it's already there: the user's data, the user's rendered page, the exact moment of failure, all inspectable.
Implementation
DOM snapshots are captured automatically by SnagRelay's bug capture widget. When a user or tester reports a bug, SnagRelay captures the current page state alongside session replay, API payloads, and error traces. The developer gets a link in their Jira or Linear ticket — click to open the snapshot in their browser.
No configuration. No extra steps for the reporter. The snapshot is just there in every report.
With bugs per developer up 54% in 2026, the difference between watching and inspecting bugs is the difference between a team that keeps up with its defect rate and one that doesn't.
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