How to save arrays and objects to localStorage using JavaScript?

In this blog, we’ll be discussing a few pointers on how to save arrays and objects to localStorage using JavaScript.

But before that, do you know what is localStorage?

localStorage allows developers to store and retrieve data in the browser. The data is stored in the form of “key”: “value” pairs & will not expire — which means that the data will be present even if the tab or the browser window is closed.

Remember — that the localStorage only stores strings in the form of “key”: “value” pairs. That brings us to the main question — how do you store arrays & objects?

Well, to save arrays or objects with the help of localStorage API using JavaScript, there are 2 methods:

– First, we need to stringify the arrays or objects using the JSON.stringify() method, and

– Secondly, when we need to retrieve the value we can use the JSON.parse() method

But why the hassle to stringify and parse the data?

It is simple – since localStorage can only store “strings” — so, before you store the array in the localStorage, you need to convert it to a string. And…

When you retrieve the array from the localStorage, because you will get a string — you’ll need to convert it to an array if you want to manipulate it. Isn’t it?

Check out this video to know more about how to save arrays and objects to localStorage using JavaScript.

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