ECMAScript 5
Full support for the ECMAScript 5 specification. Features include `Function.prototype.bind`, Array methods like `indexOf`, `forEach`, `map` & `filter`, Object methods like `defineProperty`, `create` & `keys`, the `trim` method on Strings and many more.
XMLHttpRequest advanced features
Updated functionality to the original XHR specification including things like file uploads, transfer progress information and the ability to send FormData. Previously known as [XMLHttpRequest Level 2](https://www.w3.org/TR/2012/WD-XMLHttpRequest-20120117/), these features now appear simply in the XMLHttpRequest spec.
javascript built-in: date: now
javascript built-in: temporal api: now: plaindateiso
javascript built-in: temporal api: now: plaindatetimeiso
javascript built-in: temporal api: now: zoneddatetimeiso
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