1 files changed, 13 insertions, 6 deletions
diff --git a/src/shared/script-injector.ts b/src/shared/script-injector.ts
index 697c8d6..3422bab 100644
--- a/src/shared/script-injector.ts
+++ b/src/shared/script-injector.ts
@@ -1,12 +1,19 @@
-type DataType = {
-	[key: string]: string
-};
+type DataType = Record<string, string>;
 
-export function injectScriptHead(src: string, data: DataType = {}) {
-	const s = document.createElement("script") as HTMLScriptElement;
+/**
+ * Injects a `<script>` element into the document head (or `<html>`) with
+ * the given `src` pointing to an extension resource.  Optional key/value
+ * data is attached as `data-*` attributes so the injected script can
+ * read them via `document.currentScript`.
+ *
+ * @param src  - The extension-relative script path.
+ * @param data - Optional key/value pairs to set as `data-*` attributes.
+ */
+export function injectScriptHead(src: string, data: DataType = {}): void {
+	const s = document.createElement("script");
 	s.src = chrome.runtime.getURL(src);
 	for (const i in data) {
 		s.setAttribute(`data-${i}`, data[i]);
 	}
-	(document.head || document.documentElement).append(s);
+	document.head.append(s);
 };