Grammar

Author: gaearon

content/blog/2020-08-10-react-v17-rc.md

@@ -164,7 +164,7 @@ Most effects don't need to delay screen updates, so React runs them asynchronous
 
 However, when a component is unmounting, effect *cleanup* functions used to run synchronously (similar to `componentWillUnmount` being synchronous in classes). We've found that this is not ideal for larger apps because it slows down large screen transitions (e.g. switching tabs).
 
-**In React 17, the effect cleanup function will always runs asynchronously -- for example, if the component is unmounting, the cleanup will run _after_ the screen has been updated.**
+**In React 17, the effect cleanup function always runs asynchronously -- for example, if the component is unmounting, the cleanup runs _after_ the screen has been updated.**
 
 This mirrors how the effects themselves run more closely. In the rare cases where you might want to rely on the synchronous execution, you can switch to `useLayoutEffect` instead.