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How to Bundle your React App in a Single File

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When you create a production build for your React App, the output folder contains the main index.html file and associated JavaScript and CSS files are added in the /static/js and /static/css folders respectively.

React Build Output

If you are to combine all these JS and CSS files of React App in a single bundle, you can use gulp. Here’s how:

Go to the command line and install the gulp packages as dev dependencies in your package.json file.

npm install --save-dev gulp gulp-inline-source gulp-replace

Next, create a .env file in your project root folder and set the following environment variable to disable source maps.


Next, create a gulpfile.js file in the root folder.

const gulp = require('gulp')
const inlinesource = require('gulp-inline-source')
const replace = require('gulp-replace')

gulp.task('default', () => {
    return gulp.src('./build/*.html')
        .pipe(replace('.js"></script>', '.js" inline></script>'))
        .pipe(replace('rel="stylesheet">', 'rel="stylesheet" inline>'))
            compress: false,
            ignore: ['png']

The gulp task will add the inline attribute to the <script> and the <link> tags. The inlinesource module will read these inline attributes in the html file and replace them with the actual content of the corresponding files.

Run npm run build or npx react-scripts build to create an optimized production build for your React App and then run the command npx gulp to bundle all the JS and CSS files in the static build folder into the single main html file.

React App Inline

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I am a Multimedia artist, I am born and based on Dewas (M.P), I am working as a freelancer with various brands and different country. My expertise are Graphics designing, motion graphics, 2d/3d animation, advertising videos, cartoons designing, all types of packaging and branding designing, digital marketing, SEO, design website and app Developments etc...

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