Improve Web Documentation#212
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Mar 10, 2026
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| /// | ||
| /// ## Thread-Safety | ||
| /// | ||
| /// WASM objects are usually bound to the main UI "thread" belonging to the | ||
| /// top-level webpage. Therefore this type is `!Send` and `!Sync`. It cannot be | ||
| /// sent to or used from other threads. | ||
| /// | ||
| /// Note that this type does not contain any WASM objects. However, | ||
| /// it is kept `!Send` and `!Sync` for the event that WASM objects are | ||
| /// added to this type. | ||
| /// | ||
| /// However, this status quo may change in the future, due to the adoption of | ||
| /// atomics in WASM code. Therefore this type may be made `Send` and `Sync` as | ||
| /// part of a non-breaking change. |
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Same reason as #209 (comment): it doesn't make any sense on an empty type.
We might want to consider making it Send + Sync right now. I can't think of a reason not to.
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I think we need to do more work to actually figure out the semantics of what a "display handle" is meant to be before we can really make this distinction.
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Fix some leftovers from #192.