improve effects example slightly (#13)

benlesh · web-flow · commit aeeb2bddf95f · 2024-05-22T16:58:32.000-04:00
Just adds a line to release anything that might be held in a closure by the cleanup function.
diff --git a/README.md b/README.md
@@ -86,6 +86,7 @@ export function effect(callback) {
   return () => {
     w.unwatch(computed);
     typeof cleanup === "function" && cleanup();
+    cleanup = undefined;
   };
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -86,6 +86,7 @@ export function effect(callback) {`
`86`	`86`	`return () => {`
`87`	`87`	`w.unwatch(computed);`
`88`	`88`	`typeof cleanup === "function" && cleanup();`
	`89`	`+ cleanup = undefined;`
`89`	`90`	`};`
`90`	`91`	`}`
`91`	`92`	```