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Compress images in React: Browser Image Compression Libary

tesh254 profile image wachira_Dev Updated on ・2 min read

I recently got interested in compressing images on the client-side for a couple of reasons:

  • Reduce my cloudinary bandwidth and storage usage
  • Users were complaining about long waits while uploading images

So I ventured to look for a library that will help me solve this fast and easy, maybe in the future I might build my own from scratch.

So I came by a couple of libraries that will help in compressing images on the client-side.

Browser Image Compression

  1. Install it with your favorite package manager
   npm install browser-image-compression --save

or

   yarn add browser-image-compression
  1. Create your react component
   import React from "react";

   class App extends React.Component {
     onChange = async (e) => {
       // Some onchange event calls
     };

     render() {
       return (
         <input name="file" id="file" onChange={this.onChange} type="files" />
       );
     }
   }
  1. Start compressing
   ...
   import Compress from "browser-image-compression";

   ...
   onChange = (e) => {
       // Get the files selected from the input tag
       // On select files always come in an array even
       // if you choose one its the first index
       // if you selected a couple then loop through the array
       const file = e.target.files[0]

       // Compression config
       const options = {
           // As the key specify the maximum size
           // Leave blank for infinity
           maxSizeMB: 1.5,
           // Use webworker for faster compression with
           // the help of threads
           useWebWorker: true
       }

       // Initialize compression
       // First argument is the file object from the input
       // Second argument is the options object with the
       // config
       Compress(file, options)
           .then(compressedBlob => {
               // Compressed file is of Blob type
               // You can drop off here if you want to work with a Blob file
               console.log(compressedBlob)

               // If you want to work with the File
               // Let's convert it here, by adding a couple of attributes
               compressedBlob.lastModifiedDate = new Date()

               // Conver the blob to file
               const convertedBlobFile = new File([compressedBlob], file.name, { type: file.type, lastModified: Date.now()})

               // Here you are free to call any method you are gonna use to upload your file example uploadToCloudinaryUsingPreset(convertedBlobFile)
           })
           .catch(e => {
               // Show the user a toast message or notification that something went wrong while compressing file
           })
   }

Next

Next, we will cover using react-image-file-resizer library

Posted on by:

tesh254 profile

wachira_Dev

@tesh254

Full-stack dev 😎💻, not a great gamer 😁🎮 always there to help.

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