Completing Gulp - JS and Image Minification

Lecture 403:- Completing Gulp - JS and Image Minification

To expand on the previous answer, in addition to CSS minification, Gulp can also be used to minify JavaScript (JS) files and optimize images. Here's how you can complete the Gulp setup for JS and image minification:

1. Install Required Plugins: In your project directory, install the necessary Gulp plugins for JS minification and image optimization. Run the following command:

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   npm install gulp-uglify gulp-imagemin --save-dev

   This installs the gulp-uglify plugin for JS minification and the gulp-imagemin plugin for image optimization.

2. Update Gulpfile: Open your gulpfile.js in a code editor and modify it to include the tasks for JS and image minification. Below is an example:

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   const gulp = require('gulp'); const cssmin = require('gulp-cssmin'); const rename = require('gulp-rename'); const uglify = require('gulp-uglify'); const imagemin = require('gulp-imagemin'); gulp.task('minify-css', function () {  return gulp.src('src/css/*.css')    .pipe(cssmin())    .pipe(rename({ suffix: '.min' }))    .pipe(gulp.dest('dist/css')); }); gulp.task('minify-js', function () {  return gulp.src('src/js/*.js')    .pipe(uglify())    .pipe(rename({ suffix: '.min' }))    .pipe(gulp.dest('dist/js')); }); gulp.task('optimize-images', function () {  return gulp.src('src/images/*')    .pipe(imagemin())    .pipe(gulp.dest('dist/images')); }); gulp.task('default', gulp.parallel('minify-css', 'minify-js', 'optimize-images'));

   In this updated example, the minify-js task takes JS files from the src/js/ folder, applies the uglify plugin to minify them, renames the output file with a .min suffix, and saves them in the dist/js/ folder.

   Similarly, the optimize-images task takes image files from the src/images/ folder, applies the imagemin plugin to optimize them, and saves the optimized images in the dist/images/ folder.

   The default task has been updated to include all three tasks: minify-css, minify-js, and optimize-images. When you run gulp in the command line, all these tasks will be executed simultaneously.

3. Run Gulp Tasks: Open the command line in your project directory and run the following command:

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   gulp

   This will execute all the tasks defined in the gulpfile.js, including CSS minification, JS minification, and image optimization.

   After running the tasks, Gulp will minify the CSS and JS files, optimize the images, and save the resulting files in their respective destination folders (dist/css/, dist/js/, dist/images/).

With these modifications, you have expanded your Gulp setup to include JS minification and image optimization. Gulp will now automatically perform these tasks when you run the gulp command in your project directory, streamlining your development workflow and optimizing your assets for production.