Select multiple classes with attr. with jQuery

Question

I have a function that I use for an interactive map, where I hover an element to show a specific region based on class that matches a country suffix. Im trying to figure out how to select multiple classes to show multiple regions.

Code:

var mapObj = jQuery('#vmap').data('mapObject');

            jQuery('#countries').on('mouseover mouseout', 'a:first-child', function (event) {
                // event.preventDefault();
                var elem = event.target,
                    evtype = event.type;

                if (evtype === 'mouseover') {
                    mapObj.select(jQuery(elem).attr('class'));
                } else {
                    mapObj.deselect(jQuery(elem).attr('class'));
                };
            });

};

<ul id="countries">
  <li><a class="SE" href="">Sweden</a></li>
  <li><a class="DK" href="">Denmark</a></li>
</ul>

I might going this the wrong way, but I would like to target mutiple regions by using several classes:

<li><a class="SE DK" href="">Sweden and Denmark</a></li>

This of course doesn't work but illustrates what I want to do. whats the best approach here?

Example:

 jQuery('#vmap').vectorMap({ map: 'world_en', onLabelShow: function (event, label, code) { if (code == 'se') { var countryName = label[0].innerHTML; var html = ['<span class="tooltip-up arrow-down-center">', countryName, ': 50% of production', '</span>' ].join(""); label[0].innerHTML = html; } }, backgroundColor: '#fff', enableZoom: false, color: '#ffffff', hoverOpacity: 0.7, selectedColor: '#666666', showTooltip: true, values: sample_data, scaleColors: ['#C8EEFF', '#006491'], normalizeFunction: 'polynomial', pinMode: 'content', regionsSelectableOne: false, regionsSelectable: false, series: { regions: [{ scale: ['#C8EEFF', '#0071A4'], normalizeFunction: 'polynomial' }] } }); var mapObj = jQuery('#vmap').data('mapObject'); jQuery('#countries').on('mouseover mouseout', 'a:first-child', function (event) { // event.preventDefault(); var elem = event.target, evtype = event.type; if (evtype === 'mouseover') { mapObj.select(jQuery(elem).attr('class')); } else { mapObj.deselect(jQuery(elem).attr('class')); }; });

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <link href="https://www.10bestdesign.com/jqvmap/assets/jqvmaps/jqvmap.css" media="screen" rel="stylesheet" type="text/css"> <script src="https://www.10bestdesign.com/jqvmap/assets/jqvmaps/jquery.vmap.js"></script> <script src="https://www.10bestdesign.com/jqvmap/assets/jqvmaps/maps/jquery.vmap.world.js"></script> <script src="https://www.10bestdesign.com/jqvmap/assets/jqvmaps/jquery.vmap.sampledata.js"></script> <div id="vmap" style="width: 800px; height: 400px;"></div> <ul id="countries"> <li><a class="SE" href="">Sweden</a></li> <li><a class="DK" href="">Denmark</a></li> <li><a class="SE DK" href="">Sweden and Denmark</a></li> </ul>

Answer 1

You can modify your select/deselect function to accept array of classes, or instead loop the classes and invoke select/deselect for each class name:

var mapObj = jQuery('#vmap').data('mapObject');

        
jQuery('#countries').on('mouseover mouseout', 'a:first-child', function (event) {
  var elem = event.target;
  var countryCodes = jQuery(elem).attr('class').split(/\s+/);

  evtype = event.type;

  if (evtype === 'mouseover') {
    jQuery.each(countryCodes, function(index, code) {
       mapObj.select(code);
    });
  } else {
    jQuery.each(countryCodes, function(index, code) {
      if (mapObj.isSelected(code)) {
        mapObj.deselect(code);
      } else {
        mapObj.select(code);
        mapObj.deselect(code);
      }
    });
  };
});

Answer 2

you can split each class and put in foreach loop so all element will target where that class is exist

var mapObj = jQuery('#vmap').data('mapObject');

        jQuery('#countries').on('mouseover mouseout', 'a:first-child', function (event) {
            // event.preventDefault();
            var elem = event.target,
                evtype = event.type;

            var attrClass = jQuery(elem).attr('class');
            var claArr = attrClass.slit(" ");
            jQuery(claArr).each(function(index,values){
                if (evtype === 'mouseover') {
                    mapObj.select(values);
                } else {
                    mapObj.deselect(values);
                };
            });    
            if (evtype === 'mouseover') {
                mapObj.select(jQuery(elem).attr('class'));
            } else {
                mapObj.deselect(jQuery(elem).attr('class'));
            };
        });

};