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Using localStorage in Javascript

JavaScript provides the localStorage and sessionStorage objects, which can be used to store key-value pairs of data in the browser. The difference between the two is that localStorage stores data permanently, while sessionStorage stores data for a single session (data is lost when the browser tab is closed).

Here are a few examples of how to use localStorage to store JSON data:

JavaScript
// Store data
localStorage.setItem('myData', JSON.stringify({name: 'John', age: 30}));

// Retrieve data
let data = JSON.parse(localStorage.getItem('myData'));
console.log(data.name); // 'John'
console.log(data.age); // 30

// Remove data
localStorage.removeItem('myData');

It’s important to note that the data stored in localStorage is limited to strings, so you need to use JSON.stringify() to convert your JSON object to a string when storing it, and JSON.parse() to convert it back to an object when retrieving it.

Also, localStorage is a client side storage, it’s not recommended to store sensitive data in the localstorage, as it can be accessed by any script running on the same origin.

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