Ff149 allow more chars in attributes/element names by hamishwillee · Pull Request #43350 · mdn/content

hamishwillee · 2026-03-06T06:05:41Z

FF149 adds support for additional characters to be used in attribute and element names in https://bugzilla.mozilla.org/show_bug.cgi?id=1773312. Previoulsy the DOM allowed you to only create them with XML characters, now the rules are less restrictive.

This adds docs updates.

Related docs work can be tracked in #43218

github-actions · 2026-03-06T06:07:22Z

Preview URLs (10 pages)

External URLs (7)

URL: /en-US/docs/Web/API/Document/createAttribute
Title: Document: createAttribute() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/Document/createAttributeNS
Title: Document: createAttributeNS() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/Document/createElement
Title: Document: createElement() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/Document/createElementNS
Title: Document: createElementNS() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/DOMImplementation/createDocument
Title: DOMImplementation: createDocument() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/Element/setAttribute
Title: Element: setAttribute() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

URL: /en-US/docs/Web/API/Element/setAttributeNS
Title: Element: setAttributeNS() method

https://www.w3.org/TR/xml/ (1 time) (Note! This may be a new URL 👀)

(comment last updated: 2026-03-23 01:51:23)

files/en-us/web/api/document/createattributens/index.md

files/en-us/web/api/document/createattribute/index.md

files/en-us/web/api/document/createattributens/index.md

files/en-us/web/api/document/createelementns/index.md

files/en-us/web/api/document/createelement/index.md

files/en-us/web/api/element/setattributens/index.md

files/en-us/web/api/document/createelementns/index.md

Includes: - Document.createAttribute()/createAttributeNS() - Document.setAttribute()/setAttributeNS() - Document.createElement()/createElementNS() - Element.toggleAttribute() - DOMImplementation.createDocument() - CustomElementRegistry.whenDefined()/define()

files/en-us/web/api/document/createattribute/index.md

chrisdavidmills

@hamishwillee a bunch of suggestions to sift through, but nothing serious. Nice work!

files/en-us/web/api/document/createattributens/index.md

files/en-us/web/api/document/createelement/index.md

files/en-us/web/api/document/createelementns/index.md

files/en-us/web/api/element/setattributens/index.md

files/en-us/web/api/element/toggleattribute/index.md

files/en-us/web/api/document/createattribute/index.md

files/en-us/web/api/document/createattributens/index.md

files/en-us/web/api/document/createelementns/index.md

Co-authored-by: Chris Mills <chrisdavidmills@gmail.com> Co-authored-by: Hamish Willee <hamishwillee@gmail.com>

files/en-us/web/api/document/createattributens/index.md

files/en-us/web/api/document/createelementns/index.md

files/en-us/web/api/domimplementation/createdocument/index.md

files/en-us/web/api/element/setattributens/index.md

Co-authored-by: Hamish Willee <hamishwillee@gmail.com>

hamishwillee · 2026-03-20T00:56:09Z

Thanks very much @chrisdavidmills - I accepted all your suggestions.

chrisdavidmills

I have found a broken link, and I also added another suggestion for your consideration, which you can take or leave.

I will approve this now, so you can merge when ready. I don't think I need to see this again.

Cheers, @hamishwillee!

files/en-us/web/api/document/createelementns/index.md

Co-authored-by: Hamish Willee <hamishwillee@gmail.com>

hamishwillee requested a review from a team as a code owner March 6, 2026 06:05

hamishwillee requested review from chrisdavidmills and removed request for a team March 6, 2026 06:05

hamishwillee marked this pull request as draft March 6, 2026 06:05

github-actions bot added Content:WebAPI Web API docs size/m [PR only] 51-500 LoC changed labels Mar 6, 2026

hamishwillee commented Mar 6, 2026

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[WebAPI] Allow more characters in element/attribute names and prefixes #43218

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hamishwillee commented Mar 9, 2026

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hamishwillee force-pushed the ff149_allow_chars_attributes_elements branch from febf052 to f600acb Compare March 10, 2026 02:37

hamishwillee changed the title ~~Ff149 allow chars attributes elements~~ Ff149 allow more chars in attributes/element names Mar 10, 2026

hamishwillee force-pushed the ff149_allow_chars_attributes_elements branch from f600acb to 2643011 Compare March 10, 2026 02:51

hamishwillee marked this pull request as ready for review March 10, 2026 02:51

hamishwillee force-pushed the ff149_allow_chars_attributes_elements branch from 2643011 to 2745030 Compare March 10, 2026 03:59

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hamishwillee mentioned this pull request Mar 13, 2026

Missing scoped custom element registries docs #43237

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chrisdavidmills requested changes Mar 13, 2026

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