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Single style capture (#1437)

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Support a contrived/rare case where a <style> element has multiple text node children (this is usually only possible to recreate via javascript append) ... this PR fixes cases where there are subsequent text mutations to these nodes; previously these would have been lost

* In this scenario, a new CSS comment may now be inserted into the captured `_cssText` for a <style> element to show where it should be broken up into text elements upon replay: `/* rr_split */`
* The new 'can record and replay style mutations' test is the principal way to the problematic scenarios, and is a detailed 'catch-all' test with many checks to cover most of the ways things can fail
* There are new tests for splitting/rebuilding the css using the rr_split marker
* The prior 'dynamic stylesheet' route is now the main route for serializing a stylesheet; dynamic stylesheet were missed out in #1533 but that case is now covered with this PR

This PR was originally extracted from #1475 so the  initial motivation was to change the approach on stringifying <style> elements to do so in a single place.  This is also the motivating factor for always serializing <style> elements via the `_cssText` attribute rather than in it's childNodes; in #1475 we will be delaying populating `_cssText` for performance and instead recorrding them as assets.

Thanks for the detailed review to  Justin Halsall <Juice10@users.noreply.github.com> & Yun Feng <https://github.com/YunFeng0817>
This commit is contained in:
Eoghan Murray
2026-04-01 12:00:00 +08:00
committed by GitHub
parent f8b3f4f8a2
commit 67657a8710
19 changed files with 1595 additions and 387 deletions
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7
packages/rrweb-snapshot/test/__snapshots__/integration.test.ts.snap
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@@ -1094,12 +1094,13 @@ exports[`shadow DOM integration tests > snapshot shadow DOM 1`] = `
{
\\"type\\": 2,
\\"tagName\\": \\"style\\",
\\"attributes\\": {},
\\"attributes\\": {
\\"_cssText\\": \\":host { display: inline-block; width: 650px; font-family: \\\\\\"Roboto Slab\\\\\\"; contain: content; }:host([background]) { background: var(--background-color, #9E9E9E); border-radius: 10px; padding: 10px; }#panels { box-shadow: rgba(0, 0, 0, 0.3) 0px 2px 2px; background: white; border-radius: 3px; padding: 16px; height: 250px; overflow: auto; }#tabs { display: inline-flex; user-select: none; }#tabs slot { display: inline-flex; }#tabs ::slotted(*) { font: 400 16px / 22px Roboto; padding: 16px 8px; margin: 0px; text-align: center; width: 100px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; cursor: pointer; border-top-left-radius: 3px; border-top-right-radius: 3px; background: linear-gradient(rgb(250, 250, 250), rgb(238, 238, 238)); border: none; }#tabs ::slotted([aria-selected=\\\\\\"true\\\\\\"]) { font-weight: 600; background: white; box-shadow: none; }#tabs ::slotted(:focus) { z-index: 1; }#panels ::slotted([aria-hidden=\\\\\\"true\\\\\\"]) { display: none; }\\"
},
\\"childNodes\\": [
{
\\"type\\": 3,
\\"textContent\\": \\":host { display: inline-block; width: 650px; font-family: \\\\\\"Roboto Slab\\\\\\"; contain: content; }:host([background]) { background: var(--background-color, #9E9E9E); border-radius: 10px; padding: 10px; }#panels { box-shadow: rgba(0, 0, 0, 0.3) 0px 2px 2px; background: white; border-radius: 3px; padding: 16px; height: 250px; overflow: auto; }#tabs { display: inline-flex; user-select: none; }#tabs slot { display: inline-flex; }#tabs ::slotted(*) { font: 400 16px / 22px Roboto; padding: 16px 8px; margin: 0px; text-align: center; width: 100px; text-overflow: ellipsis; white-space: nowrap; overflow: hidden; cursor: pointer; border-top-left-radius: 3px; border-top-right-radius: 3px; background: linear-gradient(rgb(250, 250, 250), rgb(238, 238, 238)); border: none; }#tabs ::slotted([aria-selected=\\\\\\"true\\\\\\"]) { font-weight: 600; background: white; box-shadow: none; }#tabs ::slotted(:focus) { z-index: 1; }#panels ::slotted([aria-hidden=\\\\\\"true\\\\\\"]) { display: none; }\\",
\\"isStyle\\": true,
\\"textContent\\": \\"\\",
\\"id\\": 38
}
],