Code Minification & Bundling
Reduce JS/CSS payload with minification, bundling & tree-shaking
What's Included
- JS & CSS minification
- Bundle analysis (Webpack Bundle Analyser)
- Tree-shaking & dead code elimination
- Code splitting for lazy loading
- Critical CSS extraction & inlining
- Render-blocking resource elimination
- Defer & async script loading
- WordPress script optimisation (Autoptimize)
- Gzip / Brotli compression setup
- Before/after payload comparison
About This Service
Unoptimised JavaScript and CSS are a major cause of slow First Contentful Paint (FCP) and render-blocking delays. Large, unminified files, multiple separate script requests, and unused code all add unnecessary bytes that browsers must download, parse, and execute before rendering the page. At WebCraftera LLP, we apply professional code optimisation techniques that dramatically reduce JavaScript and CSS payloads.
Our process covers: minification of all JS and CSS files, bundle analysis to identify large dependencies, tree-shaking to eliminate dead code, code splitting for lazy-loaded route chunks, critical CSS extraction and inlining for above-the-fold content, and defer/async attributes on non-critical scripts. For WordPress sites, we configure Autoptimize or Asset CleanUp to handle script management.
Technologies We Use
Industry-leading tools and frameworks we leverage to deliver this service.
Key Benefits
Smaller JS/CSS bundles load faster
Eliminated render-blocking improves FCP
Tree-shaking removes unused library code
Code splitting reduces initial bundle size
Async loading prevents parser blocking
Our Process
Bundle Analysis
Analysing current JS/CSS size and identifying largest contributors.
Minification Setup
Configuring build tools or plugins for minification.
Tree-shaking
Eliminating unused code from libraries and components.
Code Splitting
Implementing dynamic imports for route-based splitting.
Critical CSS
Extracting and inlining above-fold CSS; deferring the rest.
Validation
Before/after Lighthouse scores and payload comparison.
Ready to Build Your Dream Website?
Let's turn your vision into a high-performing digital experience. Get a free quote — no commitment required.