CodeSandbox
summary
An online editor for web apps that actually runs bundling and code execution in the browser, CodeSandbox explains how it reduces dependency size by extracting only used files so a typical app can load ~250 kilobytes of dependencies instead of megabytes, exposes a browser bundler called Sandpack, adds live real‑time collaboration with classroom mode, shows integrated test and Git workflows, and claims 300,000 hosted projects and 62 million requests a month while historically running on a $40 server.
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