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Incorrect constraint violation error using keyof with generic #12311
Description
TypeScript Version: master
Code
interface HTMLKind {
"a": HTMLAnchorElement;
"div": HTMLDivElement;
"span": HTMLSpanElement;
"input": HTMLInputElement;
// ... dozens more ...
[s: string]: HTMLElement;
}
// Incorrect error on the return type here
declare function getElementsByTagName<T extends keyof HTMLKind>(k: T): NodeListOf<HTMLKind[T]>;Expected behavior:
No error
Actual behavior:
Type 'HTMLKind[T]' does not satisfy the constraint 'Node'.
Activity
mhegazy commentedon Nov 18, 2016
This is blocking the change to lib.d.ts to reduce symbol instantiations at the moment, see microsoft/TypeScript-DOM-lib-generator#166