Lib: Add image preview helper

src/lib/image.ts

@@ -0,0 +1,17 @@
+export const get_image_preview_event_handler = (id: string) => {
+  const handler = (event) => {
+    const target = event.target;
+    const files = target.files;
+
+    if (files.length > 0) {
+      const src = URL.createObjectURL(files[0]);
+      const preview = document.getElementById(id) as HTMLImageElement;
+      if (preview) {
+        preview.src = src;
+        preview.hidden = false;
+      }
+    }
+  };
+
+  return handler;
+};