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HTML & Frontend-layout

HTML & Frontend-layout

Frontend development isn’t just about making things look good — it’s the foundation of the interface that determines a website’s performance, accessibility, search visibility, and time to market. At Webdelo, we approach HTML markup as a systemic architecture — one that’s easy to scale, maintain, and integrate into any ecosystem.

When the HTML code is done right, it remains stable under load, integrates easily with CMS or Headless solutions, improves SEO performance, simplifies maintenance, and works seamlessly across all devices without overhead. We’ve distilled our approach into “12 key pillars“ — and below, we break each of them down.

Semantic layout

The page structure is the foundation of everything. When it’s built correctly, the project gains an SEO advantage, becomes clearer for users, and is better interpreted by assistive technologies. We always pay special attention to semantic markup, ensuring that both search engines and screen readers can interpret the code equally well.

Proper Use of HTML5 Tags

“header”, “nav”, “main”, “article”, “section”, “aside”, “footer” — these are not just “new” tags. They define the meaning and structure of the content. We use them precisely as intended, ensuring every application or website follows a logical and consistent hierarchy.

Improving Accessibility and SEO

Semantics directly affects SEO. Search bots index pages faster and more accurately when they’re properly structured. For users with accessibility needs, it’s also a matter of navigation and content perception. We always incorporate this into the architecture from the very start.

Why Semantics Matters for Search and Screen Readers

When a page’s structure is logical and descriptive, it helps search engines more accurately understand the content — identifying where the headings, navigation, and main text are. The same applies to screen readers: users can quickly jump to the sections they need without listening to the entire page. This is critical for accessibility and directly impacts how users — and algorithms — perceive the quality of the website.

Implementing a semantic structure increased organic traffic and improved indexing performance.

The LinkGraph agency proved that using proper HTML5 structure (“header”, “nav”, “main”, “section”, and others) led to a significant increase in organic traffic and allowed pages to be indexed faster. This improvement enhanced both SEO performance and accessibility.

LinkGraph

Responsive Layout

Mobile traffic is the standard today. A project that doesn’t look good on a smartphone loses both its audience and search visibility. That’s why we build mobile-first layouts and test them across all screens — from iPhone SE to 4K monitors.

Mobile-First Approach

We start interface development with the simplest, narrowest version. This helps avoid “fitting” layouts for mobile later and ensures a clean, lightweight, and logical structure from the start. Then we scale it up for tablets and desktops.

Media Queries and Breakpoints

We don’t limit ourselves to standard Bootstrap breakpoints. For each project, we define custom breakpoints based on the real devices used by the target audience. This ensures better adaptability and consistent, stable layouts across all screens.

Google Mobile-Friendly Testing

Every project goes through the Google Mobile-Friendly Test. It helps us detect potential issues with loading, scaling, or touch interaction long before release. The result is a smooth, user-friendly interface that fully meets search engine requirements.

Mobile-first design increased mobile orders by 98%.

After implementing responsive design, Walmart Canada nearly doubled its mobile orders and increased overall conversion rates by 20%. This clearly demonstrates the direct link between adaptability and business performance.

Bluestout, 2022

Performance Optimization

Speed isn’t just about the backend. HTML and CSS contribute just as much to performance — especially on mobile devices. We optimize every possible element to ensure pages load in fractions of a second.

Minification and Build Optimization for HTML, CSS, and JavaScript

We use build tools like Vite and Webpack to clean, compress, and optimize the code. In production, only what’s essential remains — with no extra bytes.

Lazy Loading for Images

All images and media are loaded by default with the loading="lazy" attribute. This prevents render blocking and delivers to the user only what’s visible on the screen.

Lazy loading improves performance and accelerates page loading.

Google’s analysis showed that using the loading="lazy" attribute reduces render time and improves key performance metrics, especially Largest Contentful Paint (LCP). This has a direct impact on both SEO and user experience (UX).

Google Web.dev, 2023

We Follow Best Practices

We place critical CSS in the , load fonts asynchronously with font-display: swap, and use preload and preconnect directives. All of this helps reduce TTFB, LCP, and other key performance metrics. The result — green scores in Google PageSpeed and Lighthouse.

CSS Architecture

A clean, well-structured CSS architecture is the foundation of a project that can evolve for years without pain. When styles are properly organized, new features are added faster, no conflicts occur between components, and the interface remains stable even through frequent updates. We apply scalable architectural approaches that grow together with the project.

BEM Methodology

We use BEM (Block-Element-Modifier) as our primary naming convention. It helps avoid conflicts and duplication, keeps the CSS structure transparent for the entire team, and simplifies maintenance. Each block is independent, styles are predictable, and reuse is safe.

SMACSS and OOCSS When Needed

In projects with a large component base or complex styling logic, we incorporate elements of SMACSS (categorization by type: base, layout, module, state, theme) and OOCSS (object-oriented CSS). This helps avoid cascading dependencies and improves code readability.

Organizing Styles in Scalable Projects

For large-scale systems, it’s not just about writing styles — it’s about organizing them properly. We structure CSS files by modules, separating base styles, components, and utilities, and we implement a system of variables and shared tokens. This approach enables design system integration, simplifies onboarding for new developers, and reduces risks during scaling and maintenance.

Using Preprocessors: SCSS / SASS

In complex projects, we always use SCSS. It provides variables, mixins, nesting, logic, and a well-organized file structure. The code becomes modular, and the build process stays predictable and scalable — which is especially important in team-based development.

Integration with Modern CSS Frameworks

Frameworks can dramatically speed up development — when used wisely. We know how to adapt TailwindCSS and Bootstrap to fit the project’s architecture without sacrificing control or scalability. We don’t force projects to fit a framework — we choose what actually solves the problem.

TailwindCSS: A Utility-First Approach to Frontend Development

Tailwind enables rapid interface development through utility-first classes. We use it when projects require full control over styling, minimal custom CSS, and faster time to market. It’s especially effective for startups and MVPs, where speed and consistency matter most.

Bootstrap: Rapid Development of Responsive Interfaces

When speed is the priority and a clear UI kit is already defined, Bootstrap allows us to quickly build admin panels or standard interfaces. We customize it by disabling unnecessary modules, adjusting the grid, and tuning styles to fit the project’s specific needs.

When and What to Choose

We choose the framework at the very start of the project. We consider the project scale, team needs, interface type, and time to market. Sometimes, we skip frameworks entirely if they limit flexibility or add unnecessary overhead.

Interactivity at the HTML/CSS Level

Anything that can be done without JavaScript, we do without JavaScript. This speeds up loading, simplifies maintenance, and increases reliability. Modern browsers offer native capabilities for many interactive features — and we make full use of them.

Native HTML Elements

We use “details”, “summary”, “dialog”, and input type="checkbox" + :checked for simple UI patterns like accordions, dropdowns, and tabs. It’s fast, cross-browser, and requires no JavaScript handlers.

CSS Without JavaScript

Interactivity can be built using :hover, :target, :focus-within, :has(), and @media. We apply these features where they make sense — without unnecessary complexity. This approach reduces project weight and improves performance on low-end devices.

Accessibility

We build accessible interfaces by default. It’s not just about care — it’s about reaching the full audience, ensuring legal compliance, and strengthening brand reputation. We implement accessibility directly in the code, long before the project reaches production.

Support for Screen Readers and Keyboard Navigation

We code so that websites are readable by screen readers — with proper semantics, logical structure, tabindex support, focusability, and full keyboard navigation. This is critical for users with visual or motor impairments.

ARIA Attributes

When standard HTML features aren’t enough, we use ARIA attributes — such as aria-label, aria-hidden, aria-expanded, and others. They provide screen readers with more context about component behavior. We apply them only where truly necessary.

Accessibility Testing Tools

We test every project using Lighthouse, axe-core, and screen readers like VoiceOver and NVDA. We fix all issues at the HTML/CSS level before release. This ensures WCAG compliance and guarantees that the product is accessible to everyone.

HTML SEO Optimization

Technical SEO starts with HTML. The way the document is structured determines how quickly and accurately a search engine understands what your page is about. We design markup with SEO requirements in mind right from the start.

Heading Structure (h1–h6)

One h1 per page, with a clear h2–h6 hierarchy within sections. This is crucial for both users and search engines — it makes the navigation, meaning, and structure of the page transparent.

Microdata (Structured Markup)

For product cards, events, news, and other types of content, we add JSON-LD structured data. This helps generate rich snippets in search results and improves CTR.

Meta Tags and Open Graph

We generate title, description, og:title, og:image, og:type, and other meta tags. This improves how pages appear in search engines, messengers, and social networks. Everything is rendered directly from HTML, with no dependency on JavaScript.

Font Loading and Optimization

Fonts are often a major cause of poor performance. We make sure they don’t slow down the website or break the visual layout.

Modern Formats (WOFF2)

We load only WOFF2 fonts — the most compressed format, supported by all modern browsers. This reduces page weight and accelerates loading speed.

Font-Display: Swap

We use font-display: swap to ensure text is visible immediately, even before the font fully loads. This improves UX and helps meet Core Web Vitals requirements.

Font and Weight Optimization

We never load more than 2–3 font weights. Fonts are optimized via the Google Fonts API or local files. For projects with a design system, we create a custom font build.

Integration of Markup with CMS

Integration of Markup with Content Management Systems (CMS)

We don’t just build layouts — we prepare interfaces ready to live within a CMS ecosystem. That means clean structure, components easily integrated into templating engines, and flexibility for dynamic data. As a result, integration happens faster, without quality loss, and without last-minute fixes.

Support for WordPress, Sylius, and Headless CMS

We adapt our markup for any content management system. For WordPress, we use templating and ACF-based structures. For Sylius, components are fully compatible with Twig and Symfony templates. For Headless CMS, we ensure a clear separation of logic and presentation with an API-driven structure.

Component Structure and Reusability

Each interface block is an independent component with minimal dependencies. This is essential when integrating with a CMS, where the same element may be reused across multiple sections. We design for these scenarios in advance, ensuring consistency and flexibility.