Fix false-positive Preact detection (#50)

retlehs · web-flow · commit 7c11e0650bf9 · 2026-06-07T17:08:09.000-05:00
diff --git a/internal/stack/stack.go b/internal/stack/stack.go
@@ -324,7 +324,7 @@ func detectJSLibs(r *Result, html string) {
 		{"Livewire", []string{"livewire/livewire", " wire:"}},
 		{"Next.js", []string{"__next_data__", "/_next/"}},
 		{"Nuxt", []string{"__nuxt", "/_nuxt/"}},
-		{"Preact", []string{"preact.min.js", "preact/"}},
+		{"Preact", []string{"preact.min.js", "preact/hooks", "preact/compat", "/preact@"}},
 		{"React", []string{"react.production.min.js", "react-dom", "data-reactroot", "_reactlistening"}},
 		{"Remix", []string{"__remix"}},
 		{"Solid.js", []string{"solid-js", "_$createcomponent"}},
diff --git a/internal/stack/stack_test.go b/internal/stack/stack_test.go
@@ -185,6 +185,16 @@ func TestDetectJSLibs(t *testing.T) {
 			html: `<script id="__next_data__" type="application/json">{"page":"/"}</script>`,
 			want: []string{"Next.js"},
 		},
+		{
+			name: "Preact from submodule import",
+			html: `<script type="importmap">{"imports":{"preact/hooks":"https://esm.sh/preact/hooks"}}</script>`,
+			want: []string{"Preact"},
+		},
+		{
+			name: "Preact not detected from a tag URL",
+			html: `<a href="/tags/preact/" class="tag">#Preact</a>`,
+			want: nil,
+		},
 		{
 			name: "no false positives",
 			html: `<html><body><p>Just a simple page</p></body></html>`,
