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fix: Improve srcset rewriter to handle descriptors correctly.

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The previous implementation failed to properly rewrite srcset attributes
when they contained descriptors (like 1.5x, 2x). Updated the parser to
preserve descriptors while rewriting URLs.
This commit is contained in:
Terry 2024-11-11 08:35:10 +00:00
parent 73357d0172
commit 3015dff77d
1 changed files with 12 additions and 9 deletions
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21
src/shared/rewriters/html.ts
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@ -283,17 +283,20 @@ function traverseParsedHtml(
} }
export function rewriteSrcset(srcset: string, meta: URLMeta) { export function rewriteSrcset(srcset: string, meta: URLMeta) {
const urls = srcset.split(/ [0-9]+x,? ?/g); const sources = srcset.split(",").map((src) => src.trim());
if (!urls) return ""; const rewrittenSources = sources.map((source) => {
const sufixes = srcset.match(/ [0-9]+x,? ?/g); // Split into URLs and descriptors (if any)
if (!sufixes) return ""; // e.g. url0, url1 1.5x, url2 2x
const rewrittenUrls = urls.map((url, i) => { const [url, ...descriptors] = source.split(/\s+/);
if (url && sufixes[i]) {
return rewriteUrl(url, meta) + sufixes[i]; // Rewrite the URLs and keep the descriptors (if any)
} const rewrittenUrl = rewriteUrl(url.trim(), meta);
return descriptors.length > 0
? `${rewrittenUrl} ${descriptors.join(" ")}`
: rewrittenUrl;
}); });
return rewrittenUrls.join(""); return rewrittenSources.join(", ");
} }
// function base64ToBytes(base64) { // function base64ToBytes(base64) {