fix(selector/focusable): dropping namespace attribute to find SVG lin…

…ks in IE9

docs/api/selector.md

@@ -12,4 +12,4 @@ It is impossible to query focusable elements by way of CSS selector alone, becau
 
 ## Contributing
 
-While `ally/selector/focusable` will identify elements that are filtered by [`ally.query.focusable`](query/focusable.md), the inverse is not true - whatever cannot be identified as *potentially* focusable via CSS selector, will *not* be returned by [`ally.query.focusable`](query/focusable.md) either. To identify *everything*, the `query/focusable.strict` implementation uses  [TreeWalker](https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker) instead of `document.querySelectorAll()`.
+While `ally/selector/focusable` will identify elements that are filtered by [`ally.query.focusable`](query/focusable.md), the inverse is not true - whatever cannot be identified as *potentially* focusable via CSS selector, will *not* be returned by [`ally.query.focusable`](query/focusable.md) (with `strategy: "quick"`) either. To identify *everything*, the `query/focusable.strict` implementation uses  [TreeWalker](https://developer.mozilla.org/en-US/docs/Web/API/TreeWalker) instead of `document.querySelectorAll()`.

src/selector/focusable.js

@@ -26,8 +26,9 @@ export default function() {
     // IE11 supports.can focus <fieldset>
     + (supports.canFocusFieldset ? 'fieldset,' : '')
     // Namespace problems of [xlink:href] explained in http://stackoverflow.com/a/23047888/515124
-    // Firefox supports.cannot focus <svg> child elements from script
-    + 'svg a[*|href],'
+    // svg a[*|href] does not match in IE9, but since we're filtering
+    // through is/focusable we can include all <a> from SVG
+    + 'svg a,'
     // may behave as 'svg, svg *,' in chrome as *every* svg element with a focus event listener is focusable
     // navigational elements
     + 'a[href],'