Lesson 7.4 of the JavaScript tutorial — the Fetch API, request/response, the famous res.ok gotcha, sending JSON and FormData bodies, AbortController for cancellation and timeouts, CORS, and a production-ready fetch wrapper in 15 lines.
The JavaScript Fetch API and Network Requests: Modern HTTP from the Browser Read More »
Lesson 7.5 of the JavaScript tutorial — localStorage and sessionStorage in depth: API, lifetimes, synchronicity, security (why XSS makes them risky for auth tokens), cross-tab sync via the storage event, and when to reach for IndexedDB instead.
JavaScript localStorage and sessionStorage: When to Use Each (and When Not To) Read More »
Lesson 7.3 of the JavaScript tutorial — modern HTML forms, collecting input with FormData, validating with the Constraint Validation API, the one-line FormData → JSON pattern, and the UX rules for live validation.
JavaScript Forms and Form Validation: FormData, Constraint API, and Modern Patterns Read More »
Lesson 7.2 of the JavaScript tutorial — addEventListener, the bubbling/capturing model, event delegation as the modern pattern that replaces per-element handlers, AbortController for cleanup, and preventDefault/stopPropagation.
JavaScript Events and Event Delegation: addEventListener, Bubbling, and Delegation Read More »
Lesson 7.1 of the JavaScript tutorial — what the DOM is, how to select elements with querySelector, read and write content safely (textContent vs innerHTML), manage classes with classList, create and insert elements, and traverse the tree.
JavaScript DOM Basics: Selecting, Reading, and Modifying the Page Read More »