toggle-focusable-elements.js

/**
 * Disable or enable focus on all focusable elements. Useful for proper keyboard navigation
 * of slide-based interfaces where certain slides are hidden/shown based on user interaction.
 * Assumes jQuery.
 * 
 * @param {jQuery object} $el - jQuery object whose children will be toggled
 * @param {bool} enable 
 * /
var toggleFocusableElements = function($el, enable){
	if (enable){
		$el.find('input,button,a,[role="button"],[role="checkbox"],[tabindex]').attr('tabindex', '0');
	} else {
		$el.find('input,button,a,[role="button"],[role="checkbox"],[tabindex]').attr('tabindex', '-1');
	}
};