17 Website Design & Development Best Practices

Front-end development best practices

Many websites appear visually appealing at first glance but hide underlying code that is inefficient, hard to maintain, and ultimately impacts performance. In many cases, this issue stems from using marketplace themes and templates. These tools are designed to maximize customizability for a broad user base, often at the expense of robust, production-ready coding practices.

Improving your website’s performance and maintainability doesn’t rely on a single change but rather on a collection of thoughtful optimizations. While each recommendation below may offer only a modest improvement on its own, the cumulative effect can be transformative for site speed, scalability, and future development efforts.

Here are some essential guidelines to follow when developing a website:

Essential guidelines for website development

Compress HTML and remove comments: Streamline your HTML output by compressing the code and eliminating unnecessary comments. This reduces file size and load times.
Avoid inline styles and scripts: Use external stylesheets and JavaScript files instead of inline code. This approach keeps your HTML cleaner and facilitates easier maintenance and updates.
Minify and consolidate resources: Minify your stylesheets and JavaScript files, and where possible, combine them into a single file. Fewer files mean fewer HTTP requests, leading to improved load times.
Optimize JavaScript loading: Place JavaScript resources at the bottom of your page or load them asynchronously using the defer attribute. While modern browsers often delay execution until after the document is parsed, explicitly optimizing script placement can enhance performance further.
Reduce the flash of unstyled content (FOUC): Consider non-blocking CSS loading techniques if you are comfortable with a brief flash of unstyled content. Ensure your stylesheets are lean by including only the necessary rules through media queries and, when appropriate, linking separate stylesheets for different media types rather than using one large file.
Implement modular and scalable CSS: Organize your CSS in a modular way that supports scalability. Modular CSS not only improves code manageability but also makes future enhancements easier to implement.
Eliminate unnecessary styles and frameworks: Only load styles that are actively used on your website. Avoid including full responsive frameworks if only a small portion of their functionality is required.
Minimize external JavaScript libraries: Include only the necessary JavaScript libraries and consider lighter alternatives. For example, if you need only a subset of jQuery’s features, using its streamlined version can reduce overhead.
Audit and limit tracking scripts: Use only the tracking scripts that are essential to your website’s analytics. Regularly audit these scripts since external tracking codes can significantly slow down page loading. Many tracking scripts are configured not to cache data to maintain accuracy (for example, Google Tag Manager), so it’s important to avoid unnecessary ones.
Utilize a content delivery network (CDN): A CDN can distribute your static assets across multiple hostnames, reducing the load on your server and accelerating download times for users around the globe.
Manage event listeners efficiently: Avoid non-passive event listeners and control how often event handling functions are executed. Techniques such as debouncing or throttling can prevent performance degradation when events (like window resizing) trigger rapid, repeated calls.
Use CSS properties judiciously: Relying on properties like display:none or the !important rule should be a last resort. Seek out flexible, maintainable solutions before defaulting to these methods.
Leverage caching strategies: Implement appropriate caching strategies to improve performance. Efficient caching can reduce server load and speed up page rendering.
Optimize images: Do not use unnecessarily large images (for instance, images wider than 2000px) unless absolutely required. When higher resolution images are needed, use the srcset attribute to serve optimized images based on the user’s device.
Keep your technology updated: Regular updates to your codebase, server, and other components often come with performance improvements and security fixes, so it is important to stay current with the latest versions.
Maintain a clean database: Regularly optimize your database to ensure it remains fast and efficient. A well-maintained database can significantly influence the overall performance of your website.
Prefer custom solutions over overloaded plugins: When possible, build custom plugins that address your specific needs instead of installing multiple pre-built plugins that offer only a fraction of their functionality. This approach minimizes bloat and helps maintain a lean codebase.

Web development resources

It’s important to understand best practices and why they’re important. Here’s a few resources your web team can leverage to ensure you’re developing websites that are beautiful, both inside and out: