`ReadonlyMap` lacks documentation for `forEach`, `get`, `has` and `size`
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Assessment
- Difficulty
- 1/5
- Estimated time
- Under an hour
- Newbie friendliness
- 90/100
- Issue type
- Documentation
- Clarity
- Clearly specified
- Activity status
- Quiet
- Tech stack
- typescript
- Domain
- documentation
Research direction
Open lib.es2015.collection.d.ts and compare the documented members of Map<K, V> with forEach, get, has and size on ReadonlyMap<K, V>. Check the ReadonlySet documentation change from #63481/#63483 for consistency. Done means editor hovers show descriptions for all four ReadonlyMap members matching the corresponding Map documentation.
Written by the indexing model from the issue text.
Description
⚙ Compilation target
ES2015+
⚙ Library
lib.es2015.collection.d.ts
Missing / Incorrect Definition
ReadonlyMap<K, V> lacks documentation for forEach, get, has and size.
Hovering these members in an editor shows no description, unlike the corresponding members of Map<K, V>. The documentation should ideally be copied from regular Map<K, V> for consistency, exactly as was done for ReadonlySet<T> in #63481 (fixed by #63483).
Note: the ReadonlyMap members declared in lib.es2015.iterable.d.ts (entries, keys, values and [Symbol.iterator]) are already documented; only the four members declared in lib.es2015.collection.d.ts lack documentation.
Sample Code
declare const m: ReadonlyMap<string, number>;
// Hover any of these: no documentation is shown
m.get("a");
m.has("a");
m.size;
m.forEach(v => console.log(v));
Documentation Link
No response
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