JavaScript Playground
Write it, run it, read the console.
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Runs entirely in your browser with top level await, timers, fetch and the DOM. Append to root to render into the preview panel, and reach for the ready made MinHeap, MaxHeap, PriorityQueue, Queue and Stack classes — write import { MinHeap } from '@/utils/jsClasses' exactly as you would in your project and it runs here too. Your code is saved locally as you type.