beforeExpand

fires before expanding a row that contains child rows

note

The event works:

• for Grid in the default mode with the subRow configuration option
• for Grid in the TreeGrid mode (with the type: "tree" configuration option)

beforeExpand: (rowId: string | number) => boolean | void;

Parameters:

The callback of the event is called with the following parameter:

• rowId: string | number - the id of an expanded row

Returns:

Return false to block expanding of a grid; otherwise, true.

Example

const grid = new dhx.Grid("grid_container", {
    type: "tree",
    columns: [
       // columns config
    ],
    data: dataset,
});

grid.events.on("beforeExpand", (rowId) => {
    // your logic here
    return false;
});

Change log:

added in v6.4