Coding Help Tips Resources Tutorials
Google Apps Scripts and Web Development Tutorials and Resources by Laurence Svekis
41) Canvas Signature Pad + Save PNG — exercise41_signature_pad.html <!doctype html> <html lang=”en”> <head> <meta charset=”utf-8″> <title>Signature Pad — Canvas + Pointer Events</title> <!– Build: Simple signature/drawing pad using <canvas> + Pointer Events with Save PNG. Objectives: – Use pointerdown/move/up/cancel to draw smooth lines on a canvas. – Handle DPR (devicePixelRatio) for crisp rendering. – … Read more
31) MutationObserver: Live DOM Change Log Build: A playground that logs DOM changes (add/remove nodes, attribute/text changes) from a target container in real time.Objectives: 32) IntersectionObserver: Lazy Images + Sentinels Build: A grid of 60 images that load only when they approach the viewport; a sentinel at the end indicates “end reached.”Objectives: 33) Drag & … Read more
11) Tabs Component (ARIA) Build: Keyboard-accessible tab interface with ARIA roles/states and panels.Objectives: 12) Accordion (ARIA) Build: Single-expand/collapse FAQ-style accordion with semantic buttons and ARIA linkage.Objectives: 13) Live Search with Debounce Build: Product cards filtered by a debounced input; matches highlighted.Objectives: 14) Countdown + Progress Bar Build: 10-second timer that updates a <progress> bar and … Read more
Download PDF Download Source Code 21) DOM Traversal Visualizer Build: Click any nested element to highlight the target, its ancestors, and its siblings, and show the path to root.Objectives: closest, parents/children/siblings, DOM introspection.Steps: Open file → click around the left “tree” → watch highlights and path update.Code (save as exercise21_traversal.html) <!doctype html> <html lang=”en”> <head> … Read more
Source code Each one includes: what you’ll build, learning objectives, step-by-step instructions, a single self-contained HTML file (copy–paste into a .html file and open in a browser), and a short breakdown of how the code works. 1) Select, Read, and Update DOM Content, Attributes, and Styles What you’ll build: A tiny product list with buttons … Read more
The Document Object Model (DOM) is a programming interface for web documents. It represents the page so that programs can change the document structure, style, and content. The following exercises are designed to help you understand and practice key DOM manipulation concepts. Exercise 1: Selecting Elements Objective: Learn how to select single and multiple elements … Read more
Download PDF Guide Welcome to the exciting world of web development! You’re about to learn how to build websites from scratch. But you won’t be doing it alone. This guide is built around a revolutionary idea: using Artificial Intelligence (AI) like Gemini or ChatGPT as your personal tutor, coding partner, and creative assistant. Think of … Read more
Artificial Intelligence (AI) is reshaping how we build applications. JavaScript—already the language of the web—is increasingly becoming the glue that connects AI models, APIs, and interactive user experiences. But if you’re building AI-powered projects with JavaScript, you’ll run into dozens of “how do I…” questions every day. That’s why I’ve put together this guide: 100 … Read more
Stop Reading, Start Doing: Level Up Your Skills with 10 JavaScript Exercises 100 Exercise Guide If you’ve ever tried to learn a programming language, you know the feeling. You can read tutorials and watch videos for hours, but the moment you face a blank editor, everything you “learned” seems to vanish. It’s a common problem, … Read more
Welcome! You’re about to take your first steps into the exciting world of programming with JavaScript, the language that powers the interactive web. This guide is designed to take you from a complete beginner to someone with a solid, practical foundation in just 28 days. You don’t need any prior coding experience—just curiosity and a … Read more