List of programming languages
A Promise is JavaScript’s way of representing a value that isn’t available yet but will be — or won’t be — at some point in the future. It’s the foundation of modern asynchronous code, and it solves the “callback hell” problem that plagued JavaScript before ES6. Key point: A Promise is an object with three…
These two media features address accessibility (transparency preferences) and legacy display technology (interlaced vs progressive scanning). Overview of Features Feature Description Values prefers-reduced-transparency User wants less transparency no-preference, reduce scan Monitor’s scanning process interlaced, progressive 1. prefers-reduced-transparency The prefers-reduced-transparency media feature detects if the user has requested reduced transparency — important for users who have…
async and await are the syntax sugar on top of Promises that makes asynchronous code read like synchronous code. Instead of chaining .then() calls, you write await in front of a Promise — and the function pauses until the Promise settles, without blocking the rest of the program. Key point: async marks a function as…
These three media features let you adapt styles based on JavaScript availability, display refresh capability, and HDR video support. Overview of Features Feature Description Values scripting Detects JavaScript availability none, initial-only, enabled update How often the display can update none, slow, fast video-dynamic-range Dynamic range of the video plane standard, high 1. scripting The scripting…
ES Modules (ESM) are the official, standardized way to split JavaScript code into reusable files. They use import and export to share code between files, and they’ve replaced the older CommonJS (require/module.exports) approach in modern JavaScript. Key point: ES Modules are static — imports are resolved at load time, not runtime (except for dynamic import())….
45. Transform Property Introduction The transform property is one of the most powerful tools in CSS. It lets you rotate, scale, skew, and translate elements — all without affecting the layout of other elements. What is the transform Property? The transform property applies 2D or 3D transformations to an element. Unlike properties like margin or…
Arrays come with dozens of built-in methods — the day-to-day tools that make JavaScript expressive. Some mutate the array in place; others return a new array or a value. Knowing which is which, and when to use what, is the difference between clean code and buggy code. Key point: Every array method falls into one…
The matrix() and matrix3d() functions are the most powerful — and most complex — transform functions in CSS. They let you apply exact mathematical transformations using matrices. Overview Function Dimensions Matrix Size Values matrix() 2D 3×3 (6 values) a, b, c, d, e, f matrix3d() 3D 4×4 (16 values) a through p 1. matrix() —…
The Object global is a toolbox — it’s the constructor for objects, but it also holds static methods that work on any object. These methods are how you enumerate, copy, freeze, compare, and inspect objects. They’re the foundation of modern JavaScript patterns like immutability and destructuring. Key point: Most Object.* methods work on own enumerable…
These three properties unlock the third dimension in CSS. With perspective, rotate3d, and transform-style, you can create stunning 3D effects like cubes, cards, and spatial interfaces. Overview of Features Property/Function Description Values perspective Distance from viewer to z=0 plane Length (e.g., 600px) rotate() 2D rotation around a fixed point Angle (e.g., 45deg) rotate3d() 3D rotation…
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