Learn in blocks. Build after every lesson.

Build semantic documents with a correct page shell, headings, paragraphs, links, images, lists, and tables.

Create accessible forms with labels, useful input types, validation attributes, landmarks, and meaningful alternative text.

Use selectors, the cascade, the box model, typography, colors, spacing, variables, and calculated values.

Organize interfaces with Flexbox, Grid, named areas, positioning, stacking contexts, and sensible alignment.

Use fluid sizing, media queries, responsive visibility, transitions, animations, and reduced-motion fallbacks.

Work with variables, values, operators, conditions, loops, functions, scope, arrays, and objects.

Select elements, update content and classes, handle user events, and render lists from application state.

Use promises, async/await, fetch, JSON, error handling, and localStorage to build data-driven pages.

Apply array methods, destructuring, spread syntax, classes, modules, reusable data transformations, and clean boundaries.

Combine HTML, CSS, JavaScript, accessibility, APIs, and persistence into complete applications.

Use modules, package scripts, formatting, Git branches, useful commits, environment configuration, and a repeatable deployment workflow.

Debug systematically, isolate pure logic, write focused tests, inspect browser tools, and protect important behavior from regressions.

Measure loading, reduce expensive work, validate untrusted input, avoid unsafe HTML, protect secrets, and verify production behavior.