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feat(chromium): always inject paint-callback polyfill to cover waitDelay users

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This commit is contained in:
Julien Neuhart
2026-04-24 14:30:45 +02:00
parent ce9c48b2b0
commit 200334197f
3 changed files with 32 additions and 19 deletions
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15
pkg/modules/chromium/paint_polyfill.go
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@@ -124,15 +124,14 @@ const paintCallbacksPolyfill = `
// injectPaintCallbacksPolyfillActionFunc installs the
// [paintCallbacksPolyfill] via [page.AddScriptToEvaluateOnNewDocument]
// so that it runs before any user script on the navigated page. When
// install is false the action is a no-op and the page keeps the native
// rAF, ResizeObserver, and IntersectionObserver implementations.
func injectPaintCallbacksPolyfillActionFunc(logger *slog.Logger, install bool) chromedp.ActionFunc {
// so that it runs before any user script on the navigated page. The
// shim is installed unconditionally: the native rAF, ResizeObserver,
// and IntersectionObserver APIs do not fire during Chromium's
// headless-print render, so replacing them with timer-backed
// implementations either restores the behavior the page expects or has
// no effect when the page never calls them.
func injectPaintCallbacksPolyfillActionFunc(logger *slog.Logger) chromedp.ActionFunc {
return func(ctx context.Context) error {
if !install {
logger.DebugContext(ctx, "paint-callbacks polyfill not requested")
return nil
}
logger.DebugContext(ctx, "inject paint-callbacks polyfill")
_, err := page.AddScriptToEvaluateOnNewDocument(paintCallbacksPolyfill).Do(ctx)
if err != nil {