Flipkart

Build a grid of randomly colored cells that can be regenerated and recolored on click.

Random Color Matrix

Animate a list of DOM elements one after another, where each animation starts only after the previous one completes.

Given a DOM element, generate a unique CSS selector string that can be used to select that exact element from the document.

Implement the instanceof operator from scratch by walking the prototype chain to check if an object is an instance of a constructor.

Convert a DOM element tree into a JSON object representation that captures the type, props, and children.

Convert a nested JSON object describing a DOM structure into actual HTML elements and render them.

Waits for all promises in an iterable to resolve and returns an array of their results or rejects immediately if any promise is rejected.

Runs a callback when a promise settles, regardless of whether it resolved or rejected, and passes the original value through.

Convert an RGB color value to its hexadecimal string representation.