How to store multiple cache data in ReactJS ?

Last Updated : 26 Apr, 2021

We can use the following approach in ReactJS to store multiple cache data in ReactJS. We can store multiple cache data into the browser and use it in our application whenever needed. Caching is a technique that helps us to stores a copy of a given resource into our browser and serves it back when requested.

Approach: Follow these simple steps in order to store multiple cache data in ReactJS. We have created our addMultipleCacheData function which takes the user data list and store into the browser cache. When we click on the button, the function is triggered and data gets stored into the cache, and we see an alert popup. In the following example, we are trying to store multiple caches named CacheOne, CacheTwo, and CacheThree using our defined function.

Creating React Application:

Step 1: Create a React application using the following command:
```
npx create-react-app foldername
```
Step 2: After creating your project folder i.e. folder name, move to it using the following command:
```
cd foldername
```

Project Structure: It will look like the following.

Project Structure

Example: Now write down the following code in the App.js file. Here, App is our default component where we have written our code.

App.js

import * as React from 'react';
  
export default function App() {
  
  // Function to add our give multiple cache data
  const addMultipleCacheData = async (cacheList) => {
  
    for (var i = 0; i < cacheList.length; i++) {
      // Coverting our respons into Actual Response form
      const data = new Response(JSON.stringify(cacheList[i].cacheData));
  
      if ('caches' in window) {
        // Opening given cache and putting our data into it
        var cache = await caches.open(cacheList[i].cacheName)
        cache.put(cacheList[i].url, data);
      }
    }
    alert('Multiple Cache Stored!')
  };
  
  const CacheToBeStored = [
    { cacheName: 'CacheOne', cacheData: '1 CacheData', 
    url: 'https://localhost:300' },
    { cacheName: 'CacheTwo', cacheData: '2 CacheData', 
    url: 'https://localhost:300' },
    { cacheName: 'CacheThree', cacheData: '3rd CacheData', 
    url: 'https://localhost:300' },
  ]
  
  return (
    <div style={{ height: 500, width: '80%' }}>
      <h4>How to store multiple cache data in ReactJS?</h4>
      <button onClick={() => addMultipleCacheData(CacheToBeStored)} >
        Add Multiple Caches</button>
    </div>
  );
}