Introduction
HTML5 has become the basis of modern web applications, including online casino interfaces. It combines semantic markup for accessibility, multimedia capabilities (Audio, Video), high-performance graphics APIs (Canvas, WebGL) and built-in storage mechanisms (LocalStorage, IndexedDB). Adaptive design is provided by flexible layouts (Flexbox, Grid), media queries and Mobile-first technology, which allows you to support any device with a single code - from smartphones to large desktops.
1. HTML5 Semantics and Structure
Semantic tags are '
', '', '', '', '', '' for logical structure and accessibility.2. Graphics and animations: Canvas and WebGLCanvas 2D API:
Rendering spins and roulettes with custom animations, creating sprites and batch rendering.
Vector graphics and particle effects for bonus events.
WebGL:
3D models of slot machines and tables, using three. js for ease of use.
Shader optimization and GPU resource management for smooth FPS.
Animations via requestAnimationFrame: synchronizing with screen refresh rate, avoiding layout-thrashing.
3. Flexbox and CSS Grid for layouts Flexbox:
Horizontal menu, control panels, game cards with automatic stretching and alignment.
Properties' flex-grow ',' flex-shrink ',' flex-basis' for adaptive behavior of elements.
CSS GrID:
Complex lobby grids: defining zones ('grid-template-areas'), responsiveness via 'repeat (auto-fit, minmax ())'.
Layout of banners of promotions and tiles with variable height without JavaScript.
4. Media queries and Mobile-first Breakpoints:
up to 320px (small smartphones), 480px (regular smartphones), 768px (tablets), 1024px (small desktops), 1280px + (wide screens).
Adaptive images:
'', 'srcset', 'sizes' to select the desired resolution and SVG vector for icons and buttons.
Viewport and meta tags: '
5. Load and performance optimization 6. Client-side Storage and offline mode 7. Integration with frameworks and components ',' 'to isolate styles and logic.8. Testing interfaces Conclusion 
