Add `tabIndex` attribute to `SVGElement` externs.
@@ -8624,6 +8624,12 @@ SVGElement.prototype.viewportElement;
*/
SVGElement.prototype.className;
+/**
+ * @type {number}
+ * @see https://svgwg.org/svg2-draft/struct.html#tabindexattribute
+ */
+SVGElement.prototype.tabIndex;
+
/**
* @constructor
