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TabStrip

dataSource.actions.iconClassString(default: "")

If set, this value will be appended to the action button's icon element class attribute. Provides an alternative way to specify an icon using custom CSS classes.

Example 

<div id="tabstrip"></div>
<script>
    $("#tabstrip").kendoTabStrip({
        dataTextField: "text",
        dataContentField: "content",
        dataSource: [
          {
            text: "Tab with actions",
            content: "Tab content",
            actions: [
              {
                iconClass: "k-icon k-i-pencil",
                action: function(e) {
                  console.log("Edit tab", e);
                }
              }
            ]
          }
        ]
    });
</script>
In this article
dataSource.actions.iconClass
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