React For Angular Developers!
The Problem: The one big problem all the frameworks are trying to solve: The browser's real DOM operations are expensive because they trigger reflows (layout recalculations) and repaints. When a user types in an input field, the browser processes updates in four main stages : JavaScript Execution: when an event like oninput triggers, JavaScript modifies the DOM (e.g., updating an <input> field's value). Style Calculation: If styles depend on the modified element, they might need recalculating for related elements. Layout (Reflow): If the change affects an element’s size or position, the browser recalculates the layout of affected elements (e.g., increasing a <div> size). Painting & Compositing: If elements were moved, resized, or changed visually, the browser re-renders them. How React’s Virtual DOM Optimizes This Instead of immediately modifying the real DOM, React follows an optimized approach : JavaScript Execution: Just like before, the input ...
