Extract Ref class into separate module

ref.js

@@ -0,0 +1,18 @@
+/** A reference to a reactive element that follows it around through changes */
+export class Ref {
+	#current
+	/** @param {Element|Text} target A reactive element to follow */
+	constructor(target) {
+		this.#current = target
+		this.follow(target)
+	}
+
+	follow(target) {
+		target.addEventListener("replaced", ({next}) => {
+			this.#current = next
+			this.follow(next)
+		})
+	}
+
+	deref() { return this.#current }
+}

skooma.js

@@ -152,25 +152,6 @@ export const reactiveElement = observable => {
 	return element
 }
 
-/** A reference to a reactive element that follows it around through changes */
-export class Ref {
-	#current
-	/** @param {Element|Text} target A reactive element to follow */
-	constructor(target) {
-		this.#current = target
-		this.follow(target)
-	}
-
-	follow(target) {
-		target.addEventListener("replaced", ({next}) => {
-			this.#current = next
-			this.follow(next)
-		})
-	}
-
-	deref() { return this.#current }
-}
-
 /** Set an attribute on an element
 * @param {Element} element
 * @param {string} attribute