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A significant proposal by a Google engineer suggests splitting JavaScript into two separate languages, JS0 and JSSugar. JS0 would be a simplified core version directly implemented by engines, while JSSugar would have extended syntax and features, requiring compilation to JS0. The proposal aims to improve security, performance, and stability within JavaScript Virtual Machines. However, it has sparked controversy due to the potential complexity it could introduce to the ecosystem, particularly for newcomers.

The Proposal to Split JavaScript into Two Languages: An Overview