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Today we’re excited to announce our support and collaboration on a new Stage 0 proposal to bring optional and erasable type syntax to JavaScript. Because this new syntax wouldn’t change how surrounding code runs, it would effectively act as comments. We think this has the potential to make TypeScript easier and faster to use for development at every scale. We’d like to talk about why we’re pursuin
Many ECMAScript hosts and libraries have various ways of distinguishing types or operations via some kind of discriminant: ECMAScript: [Symbol.toStringTag] typeof DOM: Node.prototype.nodeType (Node.ATTRIBUTE_NODE, Node.CDATA_SECTION_NODE, etc.) DOMException.prototype.code (DOMException.ABORT_ERR, DOMException.DATA_CLONE_ERR, etc.) XMLHttpRequest.prototype.readyState (XMLHttpRequest.DONE, XMLHttpRe
ES8 Proposal: Optional Static Typing It was once said by Brendan Eich that 'Types are hard. This doesn't mean "no, never".' It's been a while since ES4. With ES6's TypedArrays and classes finalized and ES7 SIMD getting experimental tests, ECMAScript is in a good place to finally discuss types again. The demand for types as a different approach to code has been so strong in the past few years that
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