AWS, JavaScript, React - Deploy Web Apps on the Cloud - Checkout - Fixing the State

This video tutorial covers the implementation of a basket functionality in a web application. It begins by identifying the current limitations of the basket, such as the need to refresh the page to update quantities. The tutorial then introduces the use of local state and the useEffect hook to automatically refresh the basket. It addresses common mistakes in state manipulation, such as mutating existing arrays, and demonstrates the correct approach using the spread operator and filter method. The tutorial concludes with a fully functioning basket and a cheat sheet for state manipulation.

What is the significance of using the filter method instead of splice?

How can the quantity of an item in the basket be decreased safely?

What steps are taken to ensure the basket automatically refreshes after an action?

What is the purpose of the cheat sheet mentioned at the end of the lesson?