1116966 - SVGElement.prototype.focus is missing

Status: RESOLVED FIXED

(Core :: SVG, enhancement)

Description

[Rodney Rehm]

Attachment: gecko-svg-focus-missing.html

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:34.0) Gecko/20100101 Firefox/34.0
Build ID: 20141125180439

Steps to reproduce:

I tried to call focus() on an SVGElement. After realizing that focus() and blur() are not available, I tried calling HTMLElement.prototoype.focus with an SVGElement as context, only to end up with a TypeError. In Firefox SVG elements cannot be focused by script.

Live test case: http://medialize.github.io/ally.js/tests/browser-bugs/gecko-svg-focus-missing.html


Actual results:

TypeError: element.focus is not a function

after faking support by SVGElement.prototype.focus = HTMLElement.prototype.focus I got

TypeError: 'focus' called on an object that does not implement interface HTMLElement

Also reproducible in Firefox Nightly 37.0a1 (2014-12-20).


Expected results:

SVGElement.prototype.focus should have been there in the first place. Blink and WebKit expose the function at Element.prototype.focus, thus SVGElement inherits it automatically. Trident is also missing SVGElement.prototype.focus but allows abusing HTMLElement.prototype.focus on instances of SVGElement.

Comment 1

[Robert Longson [:longsonr]]

You would need to get this added to the SVG specification first before we'd consider implementing it: http://lists.w3.org/Archives/Public/www-svg/

Once it's added to the specification, feel free to reopen this bug.

Comment 2

[Rodney Rehm]

It is part of the SVG2 draft SVGElement interface: https://svgwg.org/svg2-draft/types.html#InterfaceSVGElement

Comment 3

[Robert Longson [:longsonr]]

OK

Comment 4

[4esn0k]

Could you please implement it for MathML elements too?

Comment 5

[Rodney Rehm]

The focus method is available on SVG elements in version 51.0a1 (2016-09-11) (64-bit) [possibly earlier]