This course will be retired on March 31, 2024. We recommend "React Basics" for up-to-date content.
Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll
Start a free Courses trial
to watch this video
Whenever you need to update state based on the previous state, you shouldn't rely on this.state
to calculate the next state. State updates may be asynchronous, so it may not always lead to the component re-rendering with new data, and could cause state inconsistency. setState()
accepts a callback function that produces state based on the previous state in a more reliable way.
Related Discussions
Have questions about this video? Start a discussion with the community and Treehouse staff.
Sign upRelated Discussions
Have questions about this video? Start a discussion with the community and Treehouse staff.
Sign up
You need to sign up for Treehouse in order to download course files.
Sign upYou need to sign up for Treehouse in order to set up Workspace
Sign up