Making JavaScript simpler & faster. ⚡ Daily visual guides on ESNext, V8 internals, React & Node.js performance. No fluff—just production-ready code. 👇
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ALT A dark mode JavaScript visual cheat sheet titled Array Search Cheat Sheet by @JavaScriptHubz. It compares four array search methods and their return values: includes(x) returns Boolean (value), some(fn) returns Boolean (test), every(fn) returns Boolean (all), and find(fn) returns First Item.
ALT A side-by-side comparison infographic titled Object versus Map from @JavaScriptHubz. The left side has a dark background listing Object characteristics: String keys only, No native size, and Slower deletes. The right side has a yellow background listing Map characteristics: Any key type, .size property, and Fast frequent updates.
ALT A diagnostic diagram titled "JS Event Loop Priority". A central glowing circle is labeled "Event Loop". A green horizontal box labeled "1. Microtasks (Promise)" has green arrows pointing down into the loop. A red horizontal box labeled "2. Macrotasks (setTimeout)" has a red arrow pointing to the outer edge of the loop. Watermark @JavaScriptHubz is present.
ALT A dark mode code editor image with a Mac window layout titled "What's the Output?". Line 1: const count = 0; Line 2: const a = count || 10; Line 3: const b = count ?? 10; Line 4: console.log(a, b); The text is color-coded with variables in blue and operators in red. Watermark @JavaScriptHubz is at the bottom right.
![A cheat sheet titled "Immutable Array Cheat Sheet" showing modern array methods. It maps old mutating methods on the left in red to new immutable methods on the right in green: sort() to toSorted(), reverse() to toReversed(), splice() to toSpliced(), and index assignment arr[i] = x to with(i, x). Watermark @JavaScriptHubz at the bottom.](https://pbs.twimg.com/media/HWC0bj5aIAAW2kU.jpg?name=orig)
ALT A cheat sheet titled "Immutable Array Cheat Sheet" showing modern array methods. It maps old mutating methods on the left in red to new immutable methods on the right in green: sort() to toSorted(), reverse() to toReversed(), splice() to toSpliced(), and index assignment arr[i] = x to with(i, x). Watermark @JavaScriptHubz at the bottom.
ALT A dark mode comparison infographic titled "Don't Do This vs Do This" from @JavaScriptHubz. The top section is outlined in red with a cross icon, displaying the code "user.hasOwnProperty('id');". The bottom section is outlined in green with a checkmark icon, displaying the modern alternative "Object.hasOwn(user, 'id');".
ALT An architectural diagram titled "V8 Engine: Hidden Classes" on a dark background. It compares two approaches. The top section is boxed in green: "obj.x = undefined" points to "Fast Inline Cache" with a green checkmark. The bottom section is boxed in red: "delete obj.x" points to "De-optimized Slow Lookup" with a red X. Watermark @JavaScriptHubz at the bottom.
