feat(browser): enable failure-only trace view by default by hi-ogawa · Pull Request #11766 · vitest-dev/vitest

hi-ogawa · 2026-10-28T03:09:39Z

supersedes feat(browser): enable failure-only trace view by default #11678
follow-up to feat(browser): show trace steps timeline on terminal on test failure #11594
follow-up to feat(browser): add failure-only trace view mode #11612

This PR makes browser.traceView default to 'failure-only', so every failed browser test records a trace and prints its step timeline in the failure output (#11594).

We thought of surfacing an HTML reporter suggestion in the terminal next to the timeline (#11678 (comment)), but left it in the docs only for now. The HTML reporter has its own cost, and for users who only want the terminal timeline without the HTML reporter, there would be no way to opt out of that suggestion. We may revisit the suggestion strategy later if it's considered important.

TODO

docs

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

# Conflicts: # docs/config/browser/traceview.md # packages/ui/client/components/trace/TraceView.vue # packages/vitest/src/node/config/resolveConfig.ts

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…ntry Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

… mode" This reverts commit 394809a. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

…-view-failure-only-default

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

…-view-failure-only-default

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

…-view-failure-only-default

Accepting a mode made the flag consume a following test filter. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

…-view-failure-only-default # Conflicts: # packages/vitest/src/node/cli/cli-config.ts

…lure-only-default # Conflicts: # docs/config/browser/traceview.md # docs/guide/cli-generated.md # packages/vitest/src/node/cli/cli-config.ts # packages/vitest/src/node/config/resolveConfig.ts # packages/vitest/src/node/types/browser.ts

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

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sheremet-va · 2026-10-28T06:14:57Z

-        : traceView
-          ? 'on'
-          : 'off'
+        ? (traceView.mode ??


magnificent

hi-ogawa and others added 30 commits October 16, 2026 13:08

feat(browser): add failure-only trace view mode

71e31a5

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Merge remote-tracking branch 'upstream/main' into fix/issue-10310

560f72c

# Conflicts: # docs/config/browser/traceview.md # packages/ui/client/components/trace/TraceView.vue # packages/vitest/src/node/config/resolveConfig.ts

test(browser): cover failure-only trace timeline output

c02c7f1

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: describe trace view mode as which tests keep a trace

e3a26aa

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: describe trace view modes by which tests get a trace

aecf8cf

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs: summarize trace view mode as how tests are recorded

220d014

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(browser): deprecate traceView.enabled in favor of mode

92b2ac3

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor: keep resolved traceView type as is

61adf55

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

perf(browser): load rrweb only at the first failure in failure-only mode

01cc417

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor(browser): read rrweb from the orchestrator loader directly

098f6b3

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor(browser): build trace entry once for both modes

296ca72

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(browser): drop redundant failure-only coverage

f2c1e24

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor(browser): send failure-only trace with the failed test end e…

84b1a8e

…ntry Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor(browser): create failure-only trace buffer lazily

97e3365

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(ui): cover failure-only trace in ui and html reporter

9d1539e

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(ui): combine failure-only trace checks

871426e

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test(ui): narrate failure-only trace steps

25480a6

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

refactor(browser): name the snapshot condition

ad4412c

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

fix(browser): keep the details panel position in failure-only mode

394809a

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Revert "fix(browser): keep the details panel position in failure-only…

610a724

… mode" This reverts commit 394809a. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(browser): enable failure-only trace view by default

88ca9c3

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

fix(browser): keep the details panel position by default

8dfe6ef

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test: cover failure-only trace view default

fe4345d

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test: assert trace view defaults in input order

b919a35

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

feat(browser): warn on deprecated traceView.enabled

3f2387e

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Merge remote-tracking branch 'origin/fix/issue-10310' into feat/trace…

d13fb3e

…-view-failure-only-default

feat(browser): accept mode in --browser.traceView

be73c38

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Merge remote-tracking branch 'origin/fix/issue-10310' into feat/trace…

5fde745

…-view-failure-only-default

docs: update --browser.traceView default

bf11873

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

refactor(cli): drop yes/no for --browser.traceView

778070e

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

hi-ogawa and others added 10 commits October 26, 2026 15:38

Merge remote-tracking branch 'origin/fix/issue-10310' into feat/trace…

5276171

…-view-failure-only-default

revert(cli): keep --browser.traceView boolean

28bc78b

Accepting a mode made the flag consume a following test filter. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

Merge remote-tracking branch 'origin/fix/issue-10310' into feat/trace…

4cf9ef8

…-view-failure-only-default # Conflicts: # packages/vitest/src/node/cli/cli-config.ts

docs: suggest html reporter for failure-only traces

22ab98e

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs: simplify trace view default and failure output prose

2918d44

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs: describe failure-only default in trace view guide

9f222a5

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs: clarify failure-only keeps one snapshot

404c362

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs: name trace view mode where snapshots differ

fefdb1f

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs: trim reporter flags from trace view guide

60603e6

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

hi-ogawa added this to the 5.1.0 milestone Oct 28, 2026

This was referenced Oct 28, 2026

docs(browser): rework trace view guide and config #11767

Merged

feat(browser): enable failure-only trace view by default #11678

Closed

hi-ogawa added this pull request to stack #11768 October 28, 2026 03:13

fix(browser): update trace view CLI defaults

31f9469

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

This was referenced Oct 28, 2026

fix(ui): open trace view only for tests with a trace #11770

Merged

fix(browser): skip trace entries after their attempt ended #11771

Merged

sheremet-va reviewed Oct 28, 2026

View reviewed changes

sheremet-va approved these changes Oct 28, 2026

View reviewed changes

sheremet-va merged commit f37b6b7 into main Oct 28, 2026
28 of 29 checks passed

sheremet-va deleted the feat/trace-view-failure-only-default branch October 28, 2026 06:15

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feat(browser): enable failure-only trace view by default - #11766

feat(browser): enable failure-only trace view by default#11766
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hi-ogawa commented Oct 28, 2026

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