Only lint styles belonging to the tested page#159
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A browsertime HAR can contain more than one page, for example when a concurrent browsertime run on the same host races for the same Chrome DevTools port and its crossed CDP session records another website's page load into this run's recording (see Webperf-se/webperf_core#1557). This analyzer linted every HTML and CSS response body in the whole HAR (and refetched missing CSS files from any domain in it), so a crossed-in recording could attribute another website's CSS issues to the tested website. Filter entries to the ones belonging to the first page in the HAR's pages array, and verify that the recording's first request matches the tested URL's hostname (the URL API normalizes IDN hostnames to punycode on both sides). On mismatch nothing is analyzed. HARs without a pages array and entries without pageref behave as before.
This was referenced Jul 15, 2026
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Part of a sweep across the HAR-consuming plugins; same problem class as Webperf-se/webperf_core#1557 / #1558 and Webperf-se/plugin-pagenotfound#156.
Problem
Concurrent browsertime runs on one host can race for the same Chrome DevTools port; the crossed CDP session records the other run's page navigation into this run's HAR, so the HAR can contain more than one page.
transform2SimplifiedDatalinted every HTML and CSS response body in the whole HAR — andmissingCssUrlswould even refetch another website's stylesheets — so a crossed-in recording attributes the other site's CSS issues (and score impact) to the tested website.Fix
New
getFirstPageEntries(url, harData):pagerefbelongs to the first page in the HAR'spagesarray;new URL(...)punycodes IDN hostnames on both sides) — on mismatch nothing is analyzed.Cross-domain stylesheets loaded by the tested page are still linted (
pagerefgroups by initiating page, not by domain). HARs without apagesarray and entries withoutpagerefbehave exactly as before.Validation
Synthetic crossed HAR: only the tested page's HTML/CSS are collected, foreign stylesheets excluded; origin mismatch yields an empty analysis; legacy HAR without
pagesunchanged;eslintclean.