JavaScript: Guides and Practical Know-how | Page 6 | mironsoft Blog
JavaScript
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Dec 26, 2025
A Kanban board with columns, draggable cards and persistent state can be fully implemented with Alpine.js and the native HTML5 Drag and Drop API. No SortableJS, no jQuery UI, not a single extra kilobyte of JavaScript, yet full control over behavior, accessibility and the appearance of the board.
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Dec 24, 2025
A single import from a poorly structured TypeScript library can pull several hundred kilobytes of unused code into the consumer bundle, despite modern bundlers. Tree shaking is not automatic bundler magic, it depends decisively on how the library itself was built, exported and declared in the sideEffects field.
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Dec 23, 2025
JavaScript is single-threaded by nature, but with SharedArrayBuffer and Atomics there is true shared memory between threads. This solves scenarios that could not be handled efficiently with postMessage: fast image processing, parsers, WASM integration and lock-free data structures.
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Dec 22, 2025
Compiler macros such as defineProps and defineModel look like normal function calls but do not exist at runtime at all, the Vue compiler transforms them away while building the code. The dedicated Vue Macros plugin goes further and adds its own macros for reactivity, prop forwarding and conditional compilation, with clear tradeoffs in tooling and predictability.
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Dec 18, 2025
Top-level await was one of the most requested features for JavaScript modules: waiting for asynchronous initialization directly in module scope, without wrapping the entire module in an async function. Few developers understand its effect on the module graph and the potential for deadlocks, this guide explains both.
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Dec 16, 2025
Lone surrogates from URL parameters, file uploads, or third party APIs can crash entire function chains. isWellFormed() and toWellFormed() finally provide a native safeguard.
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Dec 15, 2025
A large JavaScript bundle costs more than download time, it blocks the main thread while parsing and compiling. With dynamic import(), vendor chunk splitting, and targeted lazy loading of heavy below-the-fold widgets, initial bundle size drops noticeably without losing functionality, even in server-rendered Hyva stores built on Alpine.js.
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Dec 15, 2025
The Fetch API is more than a replacement for XMLHttpRequest. Anyone who masters timeouts, retry logic, streaming responses, authentication and cache strategies writes HTTP communication that stays reliable and maintainable in real applications, without external libraries.
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Dec 12, 2025
Math.random() is unsuitable for IDs, since it relies on a predictable pseudo-random generator. crypto.randomUUID() delivers genuine UUID v4 values from a cryptographically secure random generator, with no external dependencies, equally in the browser and in Node.js.
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Dec 12, 2025
Import Attributes let you import JSON files directly as an ES module, with an explicit type hint that became mandatory for security reasons. In many cases it replaces fetch() plus JSON.parse() with a single line.