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focusOnElement()

Focus on an element for tab navigability or otherwise.

JavaScript February 7, 2021

Usage

JavaScript
nebula.focusOnElement(element)

Parameters

element
(Required) (Object) The element to focus on
Default: None

Parameter Notes

If the element desired to be focused on is not typically focusable, this function makes it temporarily focusable.

Request or provide clarification »

Examples

Scroll to an element and then set tab navigability to start there as well.

JavaScript
jQuery('html, body').animate({
    scrollTop: Math.floor(jQuery(scrollElement).offset().top-offset+pOffset)
}, scrollSpeed, function(){
    nebula.focusOnElement(scrollElement); //Start tab navigability here too
});
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    Source File

    Located in /assets/js/modules/utilities.js on line 173.

    No Hooks

    This function does not have any filters or actions available. Request one?
    JavaScript
    nebula.focusOnElement = function(element = false){
        if ( !element ){
            nebula.help('nebula.focusOnElement() requires an element as a string or jQuery object.', '/functions/focusonelement/');
            return;
        }
    
        //Debounce this because several things could call this simultaneously that cannot be reduced (like hashchange + scrollTo function call)
        nebula.debounce(function(){
            if ( typeof element === 'string' ){
                element = jQuery.find(element); //Use find here to prevent arbitrary JS execution
            } else if ( !element.jquery ){ //Check if it is already a jQuery object
                element = jQuery(element);
            }
    
            //If the element is not focusable itself, add tabindex to make focusable and remove again
            if ( !element.is(':focusable') ){ //Uses custom expression defined at the bottom of this file
                element.attr('tabindex', -1).on('blur focusout', function(){
                    jQuery(this).removeAttr('tabindex');
                });
            }
    
            element.trigger('focus'); //Focus on the element
        }, 500, 'focusing on element', true);
    };
    

    Override

    To override or disable this JavaScript function, simply redeclare it with the exact same function name.

    JavaScript
    nebula.focusOnElement = function(element){
        //Write your own code here, leave it blank, or return false.
    }