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Schedule Updates 402 3rd Edition will be snapped and begin its journey toward an official standard on March 1st. https://tc39.github.io/ecma402/2016/ Normative Changes Add UnicodeExtensionSubtags abstract operation. Change relevantExtensionKeys to a List. Unicode 8.0 is now required for 3rd Edition. This implies slight changes at least to white space rules and case mappings. The committee intends
I'm interested in formalizing the contract between Test262 and the implementors who maintain harnesses to execute it. For instance, implementors currently have to infer that: most tests rely on a file named harness/sta.js. some tests mutate global state so as to make realm sharing unacceptable test code must be evaluated in the global scope I expect we will see more benefit from a document like th
ES2015 specifies a sequentialized evaluation order of modules, where the particular syntactic location of an import statement in a module body has no effect on the order of evaluation. Instead, the semantics simply determines a module's list of direct dependencies and recursively calls ModuleEvaluation() on each of them in order before evaluating the body. I'll refer to this semantics as declarati
This proposal contains two advanced features, WeakRef and FinalizationRegistry. Their correct use takes careful thought, and they are best avoided if possible. Garbage collectors are complicated. If an application or library depends on GC cleaning up a WeakRef or calling a finalizer in a timely, predictable manner, it's likely to be disappointed: the cleanup may happen much later than expected, or
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