Some tag names of HTML and SVG are conflicted. So merging these two is wrong. ElementTagNameMap has to split into HTMLElementTagNameMap and SVGElementTagNameMap.
For example, a tag is defined in both HTML and SVG.
https://developer.mozilla.org/en-US/docs/Web/HTML/Element
https://developer.mozilla.org/en-US/docs/Web/SVG/Element
So the result type of document.querySelector('a') is defined as HTMLAnchorElement by TypeScript, but the actual type is HTMLAnchorElement | SVGAElement.
related: #14783
Some tag names of HTML and SVG are conflicted. So merging these two is wrong.
ElementTagNameMaphas to split intoHTMLElementTagNameMapandSVGElementTagNameMap.For example,
atag is defined in both HTML and SVG.https://developer.mozilla.org/en-US/docs/Web/HTML/Element
https://developer.mozilla.org/en-US/docs/Web/SVG/Element
So the result type of
document.querySelector('a')is defined asHTMLAnchorElementby TypeScript, but the actual type isHTMLAnchorElement | SVGAElement.related: #14783