Sandbox
Your code, your input, animated. Nothing is graded and nothing is recorded — this is the visualizer with the curriculum taken off.
Every comparison and every swap, on a small array.
Nothing is graded and nothing is recorded — there is no right answer here. Arguments are read as JSON, not evaluated.
Looking for something to work on instead? The problem sets grade what you write, the lessons walk a worked example through this same animation, and the builds assemble a real thing across several files.