Explicitly annotate the this value of set function (#3698)

This is needed for some internal tooling.
lit · Feb 27, 2023 · b9c27c5 · b9c27c5
1 parent b0c3f82
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diff --git a/.changeset/sweet-mice-love.md b/.changeset/sweet-mice-love.md
@@ -0,0 +1,5 @@
+---
+'@lit-labs/context': patch
+---
+
+Explicitly annotate the this value of a set function. This makes some tooling happier.
diff --git a/packages/labs/context/src/lib/decorators/provide.ts b/packages/labs/context/src/lib/decorators/provide.ts
@@ -65,7 +65,7 @@ export function provide<ValueType>({
       const oldSetter = descriptor?.set;
       const newDescriptor = {
         ...descriptor,
-        set: function (value: ValueType) {
+        set: function (this: ReactiveElement, value: ValueType) {
           controllerMap.get(this)?.setValue(value);
           if (oldSetter) {
             oldSetter.call(this, value);