Darien Maillet Valentine
Darien Maillet Valentine
The ellipsis token has a unique property: it’s the only terminal whose source text isn’t matched by any of the seven regular expressions given at the start of the grammar...
In [Chromium currently](https://bugs.chromium.org/p/chromium/issues/detail?id=1300754), %Intl%.[[FallbackSymbol]] behaves like a well-known symbol: it is a single symbol whose identity is shared across realms. It looks like this probably doesn’t have a test currently.
In V8 there are scenarios where it becomes observable that CreateDataPropertyOrThrow semantics are not really being used for instance field initializers. I've [opened a Chromium issue](https://bugs.chromium.org/p/chromium/issues/detail?id=1302527). Though the demonstration code...
Currently, V8 exhibits different behavior from JSC and SpiderMonkey for this construction. > When I first wrote this, I reported that JSC exhibited a third behavior (early SyntaxError). However this...
TreeWalker instances can only be created with `Document.prototype.createTreeWalker`. Is this by necessity, due to some relationship created between a given Document and TreeWalker up front, or is this just historical?...
The final step given for [Number.prototype.toString](https://tc39.es/ecma262/#sec-number.prototype.tostring) says: > 6. Return the String representation of this [Number value](https://tc39.es/ecma262/#number-value) using the radix specified by radixMV. Letters a-z are used for digits with...
Given the following example in light of the evaluation steps for [ClassExpression : class ClassTail](https://tc39.es/ecma262/#sec-class-definitions-runtime-semantics-evaluation): ```js try { void class { static { throw this; } } } catch (f)...
The “registration” of additional [well-known intrinsic objects](https://tc39.es/ecma402/#sec-402-well-known-intrinsic-objects) doesn’t currently include %SegmentsPrototype% and %SegmentIteratorPrototype%. In the absence of an entry, I’m pretty sure phrases like “The %SegmentsPrototype% Object” end up incoherent...
I’m not sure if the following passage is accurate: > The [Realm](https://tc39.es/ecma262/#realm) that a given [platform object](https://webidl.spec.whatwg.org/#dfn-platform-object) is associated with can change after it has been created. When the [Realm](https://tc39.es/ecma262/#realm)...
The signatures of pushState and replaceState currently require their `unused` arguments (previously `title`) even though their `url` arguments are optional. ```webidl interface History { /* [...] */ undefined pushState(any data,...