Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Sagar Sethi
Full Stack JavaScript Techdegree Student 233 PointsLocal Storage
How to create my local storage of Guest items
2 Answers

mk37
10,271 PointsI would recommend treehouse Using Local Storage with JavaScript tutorial, a nice kit to have in your arsenal.

Bobby Verlaan
29,372 PointsHere some code that needs to go in the App component (in App.js) that will save your state in localStorage
componentWillMount() {
// Retrieve state from local storage
const data = localStorage.getItem("state");
// Parse JSON to JavaScript object
const state = JSON.parse(data);
// Set state to the retrieved JavaScript object
this.setState(state);
}
componentDidMount() {
// Add event listener that will execute code before page refresh
window.addEventListener("beforeunload", () => {
// Stringify the state object, so it can be saved as a text value
const data = JSON.stringify(this.state);
// Set localStorage item
localStorage.setItem("state", data);
});
}
Make sure you change your newGuestId method and work with state too, so you keep incrementing your GuestId count after page refresh :-)