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tc39 / proposal-readonly-collections

Proposal: snapshot,diverge,readOnlyView methods for all collections
Apache License 2.0
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Which collections are supported? #1

Open littledan opened 4 years ago

littledan commented 4 years ago

In the shim, I just see Map and Set. However, I've heard lots of calls for read-only views on TypedArrays, and I imagine ordinary Arrays could also be an interesting case. Are these included in the proposal?

erights commented 4 years ago

@littledan yes. All enumerable collections, i.e., all collections other than WeakMap and WeakSet. TypedArray and ArrayBuffer are definitely included. I hope to include Array and SharedArrayBuffer as well, but these have additional challenges.

Although one can describe a normal object as a collection of property name to value mappings, for purposes of this proposal, I do not consider such to be collections. For purposes of this proposal, I also do not consider strings to be collections.

The shim only has Map and Set so far only because we can't do everything first ;)