Compiled Files

Major Changes

• 3a0d317: Atomic rules are now injected with sheet.insertRule() in every environment. Previously only production used the CSSOM; development and test builds appended a text node per rule, which forces the engine to reparse the whole sheet on every insertion.

Two consequences of dev and test now behaving like production:

• <style> elements no longer contain text. insertRule is a CSSOM-only mutation, so styleElement.textContent and document.head.innerHTML come back empty and the rules must be read off sheet.cssRules. Tests asserting on injected CSS via the DOM's text need updating; toHaveCompiledCss from @compiled/jest handles both sources as of the accompanying patch. In devtools, dev-mode <style> tags now render as empty, the same as production — inspect the element's CSSOM to see the rules.
• Dev no longer diverges from production. The previous fork meant CSSOM-specific bugs could only surface in production builds; both paths are now identical by construction.

Patch Changes

• efddb7e: Fix production runtime style wipe when cssMapScoped (.cc-…) rules are injected after atomic rules.

In production, atomic rules were injected via sheet.insertRule() (CSSOM-only — textContent stays empty) while non-atomic cssMapScoped rules were appended via Text.appendData() on the SAME catch-all <style> element. When a large .cc- sheet was later injected (e.g. lazily mounting the editor), the browser reparsed the sheet from its now-populated text node and DISCARDED every previously insertRule-inserted rule — an observable global style wipe (unstyled UI on affected surfaces).

Non-atomic .cc- rules now live in a dedicated 'cc' bucket with its own <style> element that insertRule never targets. The two insertion strategies can no longer share a DOM node, so the reparse-wipe is impossible by construction. Source-order cascade for cssMapScoped variants is preserved (append order within the cc bucket), and .cc- rules still cascade after every atomic bucket (the cc bucket is placed last in styleBucketOrdering).

Regression tests in runtime/__tests__/style.test.tsx assert:

• Atomic rules previously inserted via insertRule remain reachable via sheet.cssRules after a large .cc- non-atomic sheet is later injected.
• Text.appendData never mutates a <style> element whose sheet already has insertRule-inserted rules.