docs: added some documentation comments to all functions

1 files changed, 9 insertions, 0 deletions

diff --git a/src/shared/script-injector.ts b/src/shared/script-injector.ts
index 697c8d6..16cb17c 100644
--- a/src/shared/script-injector.ts
+++ b/src/shared/script-injector.ts
@@ -2,6 +2,15 @@ type DataType = {
 	[key: string]: string
 };
 
+/**
+ * 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 = {}) {
 	const s = document.createElement("script") as HTMLScriptElement;
 	s.src = chrome.runtime.getURL(src);