Writing, learning logs, and notes from building things on the web.https://rzaugusdi.xyz/https://rzaugusdi.xyz/blog/embedding-a-login-gated-app-in-an-iframe/https://rzaugusdi.xyz/blog/embedding-a-login-gated-app-in-an-iframe/Notes on the handful of things that actually block iframe embedding, and the fixes for each — grown out of a small POC tool.Wed, 08 Jul 2026 00:00:00 GMThttps://rzaugusdi.xyz/blog/webview-postmessage-vs-javascript-interface/https://rzaugusdi.xyz/blog/webview-postmessage-vs-javascript-interface/Why window.postMessage silently fails from inside an Android/iOS WebView, and the two real bridges that replace it.Wed, 08 Jul 2026 00:00:00 GMThttps://rzaugusdi.xyz/blog/notes-on-closures/https://rzaugusdi.xyz/blog/notes-on-closures/Every time I think I get it, JavaScript hands me another shape. This is the version that finally stuck.Wed, 22 Apr 2026 00:00:00 GMThttps://rzaugusdi.xyz/blog/astro-after-next/https://rzaugusdi.xyz/blog/astro-after-next/Not a victory lap — a calm explanation of why one tool fit the work better than the other.Mon, 30 Mar 2026 00:00:00 GMThttps://rzaugusdi.xyz/blog/foreach-friendly-guide/https://rzaugusdi.xyz/blog/foreach-friendly-guide/The forEach method is the cleanest way to loop through arrays in JavaScript. Learn its syntax and see how it compares to for and for...of loops.Sat, 10 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/art-of-loop/https://rzaugusdi.xyz/blog/art-of-loop/Use for loops to run code multiple times efficiently. Learn the anatomy of a for loop, how to loop through arrays, and how to avoid infinite loops.Tue, 06 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/mastering-array-methods/https://rzaugusdi.xyz/blog/mastering-array-methods/Learn the most useful array methods in JavaScript: indexOf, push, pop, shift, unshift, splice, and slice for finding, adding, and removing items.Mon, 05 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/intro-to-array/https://rzaugusdi.xyz/blog/intro-to-array/Arrays are lists of data in JavaScript. Learn how to create arrays, access items by index, check length, and modify values.Sun, 04 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/think-like-a-developer-building-components/https://rzaugusdi.xyz/blog/think-like-a-developer-building-components/Master component development by breaking down problems, focusing on essentials, and refining code step-by-step.Fri, 02 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/think-like-a-developer/https://rzaugusdi.xyz/blog/think-like-a-developer/Overcome coder's block by breaking problems into smaller tasks. A practical guide to thinking like a developer when you're stuck.Thu, 01 Aug 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/callback/https://rzaugusdi.xyz/blog/callback/A callback is a function passed to another function to run later. Learn what callbacks are, why they're useful, and how JavaScript's event loop works.Wed, 31 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/changing-classes/https://rzaugusdi.xyz/blog/changing-classes/Add, remove, toggle, and check CSS classes on DOM elements using the classList API to let CSS handle styling from JavaScript.Wed, 31 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/listening-events/https://rzaugusdi.xyz/blog/listening-events/Learn how to use addEventListener to respond to user actions like clicks and key presses, and how to change the DOM with event listeners.Wed, 31 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/selecting-element/https://rzaugusdi.xyz/blog/selecting-element/Use querySelector and querySelectorAll to select DOM elements with CSS-style selectors. Target elements by id, class, tag, and attribute.Tue, 30 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/bom-and-dom/https://rzaugusdi.xyz/blog/bom-and-dom/Learn the difference between the Browser Object Model (BOM) and the Document Object Model (DOM), and how to access them in JavaScript.Mon, 29 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/null-undefined/https://rzaugusdi.xyz/blog/null-undefined/Understand the difference between null and undefined in JavaScript — two distinct primitives that both represent the absence of a value.Sun, 28 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/not-operator/https://rzaugusdi.xyz/blog/not-operator/The ! operator inverts truthy and falsy values. Learn how to use NOT and double negation to write cleaner conditional logic in JavaScript.Sat, 27 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/if-else/https://rzaugusdi.xyz/blog/if-else/Control your program's flow with if/else statements. Learn comparison operators, truthy/falsy values, and how to make decisions in JavaScript.Fri, 26 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/object/https://rzaugusdi.xyz/blog/object/JavaScript objects store key-value pairs. Learn to access properties with dot and bracket notation, set and delete values, and use functions as methods.Fri, 26 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/arrow-function/https://rzaugusdi.xyz/blog/arrow-function/Learn JavaScript arrow functions for concise syntax. Use => instead of function, with variations for arguments and implicit returns for cleaner code.Thu, 25 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/function/https://rzaugusdi.xyz/blog/function/Learn JavaScript functions: declaring, using them, handling parameters, return values, and hoisting for organized, reusable code.Thu, 25 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/declare-variable/https://rzaugusdi.xyz/blog/declare-variable/Learn to declare variables in JavaScript to make code meaningful and manageable. Use const for fixed values and let for mutable ones, avoiding var.Sun, 21 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/basic-data-types/https://rzaugusdi.xyz/blog/basic-data-types/Explore JavaScript's basic data types: String, Number, Boolean, Null, Undefined, Symbol, and BigInt. Learn how they impact values and operations.Sat, 20 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/semicolons/https://rzaugusdi.xyz/blog/semicolons/Learn about semicolons in JavaScript, including how automatic insertion works and the impact on code readability.Sat, 20 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/comments/https://rzaugusdi.xyz/blog/comments/Understand JavaScript comments with // for single-line and /* */ for multi-line notes. Comments help document and explain your code.Fri, 19 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/console/https://rzaugusdi.xyz/blog/console/Explore the browser console for running JavaScript, debugging code, and handling errors. Learn to open the console, execute commands, and view output.Thu, 18 Jul 2024 00:00:00 GMThttps://rzaugusdi.xyz/blog/linking-javascript-file/https://rzaugusdi.xyz/blog/linking-javascript-file/Learn how to link JavaScript files to HTML, including naming practices, correct use of the script tag, and the differences between relative and absolute paths.Wed, 10 Jul 2024 00:00:00 GMT