DetailCollapse

<div id="grid"></div>
<script>
let encode = kendo.htmlEncode;
$("#grid").kendoGrid({
  columns: [
    { field: "name" },
    { field: "age" }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 }
  ],
  detailTemplate: ({ name, age }) => `<div>Name: ${encode(name)}</div><div>Age: ${encode(age)}</div>`,
  detailCollapse: function(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log(e.masterRow, e.detailRow);
  }
});
</script>

<div id="grid"></div>
<script>
let encode = kendo.htmlEncode;
function grid_detailCollapse(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log(e.masterRow, e.detailRow);
}
$("#grid").kendoGrid({
  columns: [
    { field: "name" },
    { field: "age" }
  ],
  dataSource: [
    { name: "Jane Doe", age: 30 },
    { name: "John Doe", age: 33 }
  ],
  detailTemplate: ({ name, age }) => `<div>Name: ${encode(name)}</div><div>Age: ${encode(age)}</div>`
});
var grid = $("#grid").data("kendoGrid");
grid.bind("detailCollapse", grid_detailCollapse);
</script>