diff --git a/assets/js/common.ts b/assets/js/common.ts
index d1539db..f82fed1 100644
--- a/assets/js/common.ts
+++ b/assets/js/common.ts
@@ -37,6 +37,15 @@ export const pvapp = {
 	}
 }
 
+// components
+
+function Data() {
+	return {
+		data: {},
+		save
+	}
+}
+
 // appdata method definitions
 
 function save() {
@@ -52,7 +61,15 @@ function poll() {
 	dopoll(this)
 }
 
-// basic functions
+// basic functions - move to api.ts
+
+function createSid(): string {
+	const arr = new Uint32Array(2)
+	crypto.getRandomValues(arr)
+	return arr[0].toString(36) + arr[1].toString(36)
+}
+
+console.log("sid: ", createSid())
 
 async function dopoll(app: typeof appdata) {
 	while (true) {