<script>
    var query = new kendo.data.Query([
        { name: "Jane Doe", age: 30, department: "Sales" },
        { name: "John Doe", age: 33, department: "IT" },
        { name: "Bob Smith", age: 25, department: "Sales" },
        { name: "Alice Johnson", age: 28, department: "Marketing" }
    ]);
    
    var filteredQuery = query.filter({
        logic: "and",
        filters: [
            { field: "age", operator: "gte", value: 28 },
            { field: "department", operator: "eq", value: "Sales" }
        ]
    });
    var result = filteredQuery.toArray();
    // the result can be seen in the browser console.
    console.log(result); // Will contain only Jane Doe (age >= 28 and department = Sales)
</script>