Merge pull request #879 from DarkFlorist/injection-guard

injection guard
DarkFlorist · Mar 1, 2024 · 3062cf6 · 3062cf6
2 parents 65e1ac4 + 8f9a060
commit 3062cf6
Showing 1 changed file with 11 additions and 1 deletion.
diff --git a/app/inpage/ts/document_start.ts b/app/inpage/ts/document_start.ts
@@ -1,3 +1,6 @@
+// required so this file is seen as a module by TypeScript, which lets us extend the `globalThis` definition
+export {}
+
 function listenInContentScript(conectionName: string | undefined) {
 	/**
 	 * this script executed within the context of the active tab when the user clicks the extension bar button
@@ -50,7 +53,14 @@ function listenInContentScript(conectionName: string | undefined) {
 	})
 }
 
-function injectScript(content: any) {
+declare global {
+	var interceptorInjected: true | undefined
+}
+
+function injectScript(content: string) {
+	if (globalThis.interceptorInjected) return
+	globalThis.interceptorInjected = true
+
 	try {
 		const container = document.head || document.documentElement
 		const scriptTag = document.createElement('script')