Documentation
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Overview ¶
Package render provides the headless-rendering Fetcher backed by chromedp. It renders pages in a real Chromium tab, captures the post-JS DOM, records main-document redirects/status/headers via DevTools network events, and collects lab-mode Core Web Vitals (LCP, FCP, CLS, TBT, TTFB) using PerformanceObserver. On any rendering error the fetcher falls back to a raw HTTP fetch so a single broken page does not stall the crawl.
Headless mode requires a Chromium-class browser (Chrome, Chromium, or Edge) on PATH. NewHeadlessFetcher returns an error if no compatible browser can be launched.
Index ¶
Constants ¶
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Variables ¶
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Functions ¶
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Types ¶
type HeadlessFetcher ¶
type HeadlessFetcher struct {
// contains filtered or unexported fields
}
HeadlessFetcher renders pages with chromedp and reports real Core Web Vitals.
func NewHeadlessFetcher ¶
func NewHeadlessFetcher(opts crawler.Options) (*HeadlessFetcher, error)
NewHeadlessFetcher launches the headless browser. It returns an error if no Chromium binary is available on PATH or the browser fails to start. Callers must Close() the fetcher when finished.
func (*HeadlessFetcher) Close ¶
func (h *HeadlessFetcher) Close() error
Close terminates the browser. Safe to call more than once.
Source Files