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only replace components for changed segments

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This commit is contained in:
Rich Harris
2018-07-17 15:42:35 -04:00
parent 84aaf3be4a
commit f126c6ac6c
7 changed files with 180 additions and 19 deletions
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10
src/middleware.ts
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@@ -255,14 +255,18 @@ function get_page_handler(routes: RouteObject, store_getter: (req: Req) => Store
? {}
: get_params(page.pattern.exec(req.path));
const chunks: Record<string, string> = get_chunks();
const chunks: Record<string, string | string[]> = get_chunks();
res.setHeader('Content-Type', 'text/html');
// preload main.js and current route
// TODO detect other stuff we can preload? images, CSS, fonts?
const link = []
.concat(chunks.main, error ? [] : page.parts.map(part => chunks[part.name]))
let preloaded_chunks = Array.isArray(chunks.main) ? chunks.main : [chunks.main];
page.parts.forEach(part => {
preloaded_chunks = preloaded_chunks.concat(chunks[part.name]); // using concat because it could be a string or an array. thanks webpack!
});
const link = preloaded_chunks
.filter(file => !file.match(/\.map$/))
.map(file => `<${req.baseUrl}/client/${file}>;rel="preload";as="script"`)
.join(', ');