onBeforeDelete

fires before sending data for item deletion

Example

dp.attachEvent("onBeforeDelete", function(id, details){
    //... some code here ... 
});

1 . The id parameter contains old (client-side) item ID.

2 . The details parameter contains data saving details, namely:

• data - data item object;
• id - old (client-side) ID;
• operation - the type of operation ("delete").

Note that returning false from the event handler will suppress request to the server:

const processor = webix.dp("$datatable1");
  processor.attachEvent("onBeforeDelete", () => {
    // cancel server request
    return false;
  })

Related sample:  DataProcessor: Canceling Server Request