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Declare Document.scrollingElement as HTMLElement | null #64342

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Declare Document.scrollingElement as HTMLElement | null #64342

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Copilot Sep 19, 2026
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Declare Document.scrollingElement as HTMLElement | null
Copilot Sep 19, 2026
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2 changes: 1 addition & 1 deletion tsc/internal/bundled/libs/lib.dom.d.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12833,7 +12833,7 @@ interface Document extends Node, DocumentOrShadowRoot, FontFaceSource, GlobalEve
*
* [MDN Reference](https://developer.mozilla.org/docs/Web/API/Document/scrollingElement)
*/
readonly scrollingElement: Element | null;
readonly scrollingElement: HTMLElement | null;
/**
* The **`timeline`** readonly property of the Document interface represents the default timeline of the current document. This timeline is a special instance of DocumentTimeline.
*
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11 changes: 11 additions & 0 deletions tsc/testdata/baselines/reference/compiler/documentScrollingElementType.js
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@@ -0,0 +1,11 @@
//// [tests/cases/compiler/documentScrollingElementType.ts] ////

//// [documentScrollingElementType.ts]
const scrollingElement: HTMLElement | null = document.scrollingElement;
const documentElement: HTMLElement = document.documentElement;


//// [documentScrollingElementType.js]
"use strict";
const scrollingElement = document.scrollingElement;
const documentElement = document.documentElement;
17 changes: 17 additions & 0 deletions tsc/testdata/baselines/reference/compiler/documentScrollingElementType.symbols
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@@ -0,0 +1,17 @@
//// [tests/cases/compiler/documentScrollingElementType.ts] ////

=== documentScrollingElementType.ts ===
const scrollingElement: HTMLElement | null = document.scrollingElement;
>scrollingElement : Symbol(scrollingElement, Decl(documentScrollingElementType.ts, 0, 5))
>HTMLElement : Symbol(HTMLElement, Decl(lib.dom.d.ts, --, --), Decl(lib.dom.d.ts, --, --))
>document.scrollingElement : Symbol(Document.scrollingElement, Decl(lib.dom.d.ts, --, --))
>document : Symbol(document, Decl(lib.dom.d.ts, --, --))
>scrollingElement : Symbol(Document.scrollingElement, Decl(lib.dom.d.ts, --, --))

const documentElement: HTMLElement = document.documentElement;
>documentElement : Symbol(documentElement, Decl(documentScrollingElementType.ts, 1, 5))
>HTMLElement : Symbol(HTMLElement, Decl(lib.dom.d.ts, --, --), Decl(lib.dom.d.ts, --, --))
>document.documentElement : Symbol(Document.documentElement, Decl(lib.dom.d.ts, --, --))
>document : Symbol(document, Decl(lib.dom.d.ts, --, --))
>documentElement : Symbol(Document.documentElement, Decl(lib.dom.d.ts, --, --))

15 changes: 15 additions & 0 deletions tsc/testdata/baselines/reference/compiler/documentScrollingElementType.types
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@@ -0,0 +1,15 @@
//// [tests/cases/compiler/documentScrollingElementType.ts] ////

=== documentScrollingElementType.ts ===
const scrollingElement: HTMLElement | null = document.scrollingElement;
>scrollingElement : HTMLElement | null
>document.scrollingElement : HTMLElement | null
>document : Document
>scrollingElement : HTMLElement | null

const documentElement: HTMLElement = document.documentElement;
>documentElement : HTMLElement
>document.documentElement : HTMLElement
>document : Document
>documentElement : HTMLElement

8 changes: 4 additions & 4 deletions tsc/testdata/baselines/reference/compiler/mappedTypeRecursiveInference.types
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5 changes: 5 additions & 0 deletions tsc/testdata/tests/cases/compiler/documentScrollingElementType.ts
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@@ -0,0 +1,5 @@
// @lib: es5,dom
// @strict: true

const scrollingElement: HTMLElement | null = document.scrollingElement;
const documentElement: HTMLElement = document.documentElement;