Overload missing from createElementNS

Open Beginner friendly

#63,556 opened on Jun 15, 2026 1 comment 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 75/100

Issue type: Bug
Clarity: Clearly specified
Activity status: Quiet
Tech stack: typescript
Domain: tooling

Research direction

Start by locating the DOM library declaration for Document.createElementNS and compare its existing namespace-specific overloads. Add the missing XHTML overload shown in the issue, then run the relevant TypeScript library or compiler tests to verify that an XHTML tag such as "div" is inferred as HTMLDivElement rather than HTMLElement.

Written by the indexing model from the issue text.

Description

Domain: lib.d.ts Possible Improvement

⚙ Compilation target

ESNext

⚙ Library

6.0.0

Missing / Incorrect Definition

overload is missing for the createElementNS in case provide "http://www.w3.org/1999/xhtml" as namespaceURI.

// missing  createElementNS<K extends keyof HTMLElementTagNameMap>(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: K): HTMLElementTagNameMap[K];
createElementNS(namespaceURI: "http://www.w3.org/1999/xhtml", qualifiedName: string): HTMLElement;
createElementNS<K extends keyof SVGElementTagNameMap>(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: K): SVGElementTagNameMap[K];
createElementNS(namespaceURI: "http://www.w3.org/2000/svg", qualifiedName: string): SVGElement;
createElementNS<K extends keyof MathMLElementTagNameMap>(namespaceURI: "http://www.w3.org/1998/Math/MathML", qualifiedName: K): MathMLElementTagNameMap[K];

Sample Code

document.createElementNS("http://www.w3.org/1999/xhtml", 'div'); // HTMLElement instead of HTMLDivElement

Documentation Link

No response

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