Phase 4 — Browser APIs
Phase 4 — Browser APIs
Section titled “Phase 4 — Browser APIs”Introduction
Section titled “Introduction”Browser APIs are the interfaces that let JavaScript interact with the browser. From manipulating the DOM to handling user events, storing data, and observing changes — these APIs are what make web applications dynamic and interactive.
Learning Objectives
Section titled “Learning Objectives”- Master DOM manipulation (selection, traversal, modification)
- Understand the event system (bubbling, capturing, delegation)
- Use client-side storage (localStorage, sessionStorage, IndexedDB)
- Work with browser utility APIs (clipboard, history, geolocation)
- Use observers for responsive, performant UIs
Prerequisites
Section titled “Prerequisites”- Phase 1 — Fundamentals
- Phase 3 — Async JavaScript
Topics Covered
Section titled “Topics Covered”| Topic | Description |
|---|---|
| DOM | Document Object Model basics |
| DOM Tree | Node types, parent/child/sibling relationships |
| Selectors | querySelector, getElementById, etc. |
| Traversal | parentElement, children, nextSibling, closest |
| Manipulation | createElement, appendChild, textContent, classList |
| Events | addEventListener, event object, preventDefault |
| Bubbling & Capturing | Event propagation phases |
| Event Delegation | Handling events efficiently |
| Forms | Form elements, validation, FormData |
| Web Storage | localStorage, sessionStorage |
| Cookies | Reading, writing, and cookie options |
| IndexedDB | Client-side NoSQL database |
| Clipboard API | Read/write clipboard |
| History API | Browser history navigation |
| Location API | URL information and navigation |
| Navigator API | Browser and device information |
| Geolocation | User location access |
| Intersection Observer | Element visibility tracking |
| Mutation Observer | DOM change detection |
| Resize Observer | Element size monitoring |
Learning Path
Section titled “Learning Path”DOM → Selectors → Traversal → Manipulation → Events → Bubbling/Capturing → Delegation → Forms → Storage → IndexedDB → Utility APIs → ObserversEstimated Learning Time
Section titled “Estimated Learning Time”5–7 hours
Related Topics
Section titled “Related Topics”- Phase 3 — Async JavaScript
- Phase 6 — Performance