File report on [cssom-1] Missing tasks in parallel steps in CSS Objec…

…t Model (CSSOM)

issues/cssom-1-missingtask.md

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+---
+Title: '[cssom-1] Missing tasks in parallel steps in CSS Object Model (CSSOM)'
+Tracked: N/A
+Repo: 'https://github.com/w3c/csswg-drafts'
+---
+
+While crawling [CSS Object Model (CSSOM)](https://drafts.csswg.org/cssom-1/), the following algorithms fire an event, or resolve or reject a Promise, within a step that runs [in parallel](https://html.spec.whatwg.org/multipage/infrastructure.html#in-parallel) without first queuing a task:
+* [ ] The [CSSStyleSheet/replace(text)](https://drafts.csswg.org/cssom-1/#dom-cssstylesheet-replace) algorithm resolves/rejects a promise directly in a step that runs in parallel
+
+See [Dealing with the event loop](https://html.spec.whatwg.org/multipage/webappapis.html#event-loop-for-spec-authors) in the HTML specification for guidance on how to deal with algorithm sections that run *in parallel*.
+
+<sub>Cc @dontcallmedom @tidoust</sub>
+
+<sub>This issue was detected and reported semi-automatically by [Strudy](https://github.com/w3c/strudy/) based on data collected in [webref](https://github.com/w3c/webref/).</sub>