Website Speed Optimization - Front-end + WordPress

Explore how optimization speeds page load and browser performance by reducing HTTP requests, compressing resources, optimizing images, and understanding metrics like time to first byte and first meaningful paint.

Measure web performance with browser developer tools, using the network and performance tabs, throttling, and Page Speed Insights to analyze load times and frame rates.

Explore how HTTP evolved from 1.0/1.1 to HTTP/2, enabling cheaper requests, header compression, and split resource delivery, while SSL enables HTTP/2 in most browsers.

Learn how combining CSS and JavaScript reduces HTTP requests on HTTP/1.1, when to split files for media, print, or heavy resources, and how tools like gulp or grunt automate bundling.

Learn to set up gulp for front-end workflow by installing nodejs and gulp cli, creating a gulpfile, and building automated tasks for styles and scripts with watch.

Combine images to reduce requests with CSS sprites or a custom web font for icon glyphs. Note this is mainly for HTTP/1.1 and is covered later in image optimization chapter.

Reduce http requests by loading only the needed web fonts and weights, declaring font-face for essentials, removing unused variants, and avoid client-side redirects by using server-side redirects.

Reduce dom and css complexity to speed up page loading and rendering by shrinking the document, lowering dom nodes, and trimming css rules; use ::before and ::after to reduce markup.

Explore image optimization and the essential role of imagery for front-end developers, highlighting basic computer graphics knowledge, Photoshop use, and cutting out PSD elements to plan layout.

Learn how to select the right image file format for web use, comparing bitmap and vector formats (svg), jpeg lossy, png-24 vs png-8, gif, and webp, with optimization tips.

Evaluate image file formats for front-end performance, comparing SVG, PNG-24, PNG-8, GIF, and JPEG across icons, logos, and infographics, and consider gzipping and transparency for optimal choices.

Differentiate template images from content images and optimize both. Automate content image optimization in WordPress to balance quality and speed.

Identify which elements require images and replace icons with CSS, optimize files with SVG and PNG-8/PNG-24 or GIF formats, and deploy CSS sprites or icon fonts to reduce HTTP requests.

Optimize content images for speed by automating uploads, assigning predefined sizes and JPEG quality, and delivering images with responsive techniques such as srcset/sizes or art-directed picture elements, plus lazy loading.

Learn to optimize images for speed by selecting proper formats and sizes, using media queries for viewports, enabling lazy loading, and training editors to choose image size and format.

Bundle resources to reduce HTTP requests in HTTP/1.1, and selectively bundle for HTTP/2. Minify CSS to shrink sizes using gulp automation and SASS or LESS with built-in compression.

Plan css architecture by avoiding @import and using multiple link tags for parallel downloads, and adopt a mobile-first approach with core, desktop, and print styles.

Reduce CSS bloat by removing unused styles and leftovers, and review the codebase regularly. Minimize third-party resources such as Bootstrap and avoid over-specific selectors to speed up downloads and parsing.

Bundle and minify JavaScript assets to reduce HTTP requests and speed downloads, using uglifyJS or jsmin and configuring output with -o for HTTP/1.1 and HTTP/2 protocols.

Evaluate external resources by dividing them into frameworks and libraries, weighing performance overhead. Prefer pure JavaScript for simple tasks, load heavy dependencies only when needed, and avoid unnecessary third-party scripts.

Attach scripts at the end of the document to speed DOM construction. Use async and defer to optimize loading based on dependencies.

Improve page performance by optimizing how you query and manipulate DOM elements, caching references, and using document fragments to minimize reflows and repaints.

Improve front-end performance by attaching events high in the DOM, using event delegation, limiting listeners, and assigning unique elements directly; throttle and debounce for scroll, resize, and mousemove.

Identify legacy and unused functions and variables by scanning the codebase and removing orphaned calls. Avoid using eval() and remove unused code to reduce overhead and speed page loads.

Apply practical front-end performance tactics, from efficient looping and scope considerations to avoiding DOM changes inside loops. Leverage workers for background processing and production optimizations, while prioritizing readability and maintainability.

Learn how JavaScript boosts site speed by reducing scripts, bundling and ordering downloads, and refining DOM queries, event handling, and loop efficiency with pure JavaScript.

Preload fonts to control download order and reduce flash of unstyled text; use href, rel preload, as, type, and crossorigin attributes for reliable loading.

Identify your server type, from Apache, Nginx, or IIS, and learn optimization ideas you can implement with .htaccess, location blocks, or web.config transforms.

Enable gzip compression via Apache .htaccess or WordPress plugins to cut HTML, CSS, JS, fonts, and SVG sizes, and set expires headers to cache assets while preventing hotlinking.

Configure a cookieless domain or subdomain for static files to reduce cookie overhead and improve page speed, and supplement with a CDN and up-to-date server software.

Explore WordPress optimization techniques such as static html caching to reduce time to first byte, manage plugins, and clean the database with WP Optimize for better performance.