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Vivix icon

Vivix

Vivix is a free, open-source JavaScript execution visualiser that runs entirely in your browser. No install. No account.

12 guided modules covering variables, closures, async/await, promises, event listeners, arrays, objects and more.

Cost / License

  • Free
  • Open Source (MIT)

Platforms

  • Online
Watch async/await suspend the call stack, queue a microtask and hand control back to the event loop, step by step.
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Features

Properties

  1.  Educational

Features

  1.  Debugging

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Development, Education & Reference

GitHub repository

  •  14 Stars
  •  0 Forks
  •  0 Open Issues
  •   Updated  
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What is Vivix?

Vivix is a free, open-source JavaScript execution visualiser that runs entirely in your browser. No install. No account.

Most tools show you what code outputs. Vivix shows you how it executes, step by step, instruction by instruction.

Watch the call stack grow and shrink frame by frame, heap memory mutate as objects are allocated, and async/await suspend a function mid-execution and reconstruct it after the microtask queue resolves.

12 guided modules covering variables, closures, async/await, promises, event listeners, for loops, and more. 490 passing tests. Used by 1,399 developers across 88 countries.