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Select Multiple Items in MultiSelect by Holding Shift Key

Environment

Product Kendo UI MultiSelect

Description

Is it possible to select multiple items with two clicks? How to select multiple items by holding shift key in MultiSelect?

Solution

  1. Subscribe to the text open event of the MultiSelect.
  2. In the open event handler bind a click event listener to the items using the k-list class.
    <div class="demo-section k-content">
        <select id="required" multiple="multiple" data-placeholder="Select attendees...">
            <option>Steven White</option>
            <option>Nancy King</option>
            <option>Nancy Davolio</option>
            <option>Robert Davolio</option>
            <option>Michael Leverling</option>
            <option>Andrew Callahan</option>
            <option>Michael Suyama</option>
            <option selected>Anne King</option>
            <option>Laura Peacock</option>
            <option>Robert Fuller</option>
            <option>Janet White</option>
            <option>Nancy Leverling</option>
            <option>Robert Buchanan</option>
            <option>Margaret Buchanan</option>
            <option selected>Andrew Fuller</option>
            <option>Anne Davolio</option>
            <option>Andrew Suyama</option>
            <option>Nige Buchanan</option>
            <option>Laura Fuller</option>
        </select>
    </div>     

    <script>
        $(document).ready(function() {
            var startIndex;
            var endIndex;
            var dataItems = [];
            // create MultiSelect from select HTML element
            var required = $("#required").kendoMultiSelect({
              autoClose:false,
              open:function(e){
                $(".k-list").on("click", "li", function(e){
                  if(e.shiftKey === false){
                    var items = required.items();
                    for(let item of items){
                      if(item === e.target){
                        var dataItem = required.dataItem(item)
                        startIndex = required.dataSource.indexOf(dataItem);
                      }
                    }
                  } else {
                    var items = required.items();
                    for(let item of items){
                      if(item === e.target){
                        var dataItem = required.dataItem(item)
                        endIndex = required.dataSource.indexOf(dataItem);
                        if(endIndex < startIndex) {
                          var newEndIndex = startIndex;
                          startIndex = endIndex;
                          endIndex = newEndIndex;
                        }
                      } 
                    }
                    for(let i = startIndex; i <= endIndex; i++){
                      dataItems.push(required.dataItem(items[i]).value)
                    }
                    var values = required.value();
                    var newValue = values.concat(dataItems)
                    required.value(newValue);
                  }
                })
              }
          }).data("kendoMultiSelect");
        });
      </script>

See Also

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