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* Docs: named functions and function declarations * No more prototypal `extends`; update docs and example * More comprehensive documentation of the existential operator; closes #1631 * Better document operators, including `from` * No fat arrow class methods anymore * Destructuring shouldn’t say that default values are applied in case of undefined or null * Spinoff generator and async functions into their own sections; reorder things so that the sections on functions come just before classes, and destructuring goes next to the operators (which discuss assignment) * Rewrite “CoffeeScript 2” section, making it less practical and more explanatory; move practical info into “Usage” * Update “Variable Scoping and Lexical Safety” section to remove incorrect reference to Ruby (fixes #2360), add missing details about the safety wrapper, add note about `let`/`const`. * Updated browser compiler * Updated docs * Rewrite Literate CoffeeScript breaking changes * Split apart the “Breaking Changes” and “Unsupported Features” sections into separate sidebar items and files * Add example of `not in`, closes #3281 * Fix words in bold that should be in backticks * Consolidate some breaking changes sections * Add Node API documentation; closes #3551 * Move the chaining documentation out of the changelog into its own section
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Browser-based Tests
CoffeeScript includes an extensive test suite, which verifies that the compiler generates JavaScript that behaves as it should. The tests canonically run via the Node runtime, and must all pass there before we consider publishing a new release of CoffeeScript; but you can also run the tests in a web browser. This can be a good way to determine which features of CoffeeScript your current browser may not support. In general, the latest version of Google Chrome Canary should pass all the tests.
Note that since no JavaScript runtime yet supports ES2015 modules, the tests for module support verify only that the CoffeeScript compiler’s output is the correct syntax; the tests don’t verify that the modules resolve properly.
[Run the tests in your browser.](http://coffeescript.org/v<%= majorVersion %>/test.html)