lca2019-talk/js
Jordan Hofker 76c5726c04 Check before calling blur on activeElement.
It's possible for slides to be in a situation where the last clicked thing was an SVG before the tab/window loses focus. When returning, `.blur()` is called on the previously-active element, but can result in an exception.

This protects against that and will only call `.blur()` when `document.activeElement` supports it.
2015-02-19 16:09:08 -06:00
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reveal.js Check before calling blur on activeElement. 2015-02-19 16:09:08 -06:00