# Dom.ElementByTagName

Native HTML, SVG, and MathML element type lookup by tag name.

## Signatures

```ts
export type ElementByTagName = HTMLElementTagNameMap & Omit<SVGElementTagNameMap, keyof HTMLElementTagNameMap> & Omit<MathMLElementTagNameMap, keyof HTMLElementTagNameMap | keyof SVGElementTagNameMap>;
```

## Why

Custom hosts infer from the platform's own tag maps, with HTML taking
precedence for colliding names.

## Ownership and lifetime

Type-only and resource-free.