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onBeforeTaskMultiSelect

Description​

Fires before the task selection state is being changed (the task is being selected or unselected)

onBeforeTaskMultiSelect: (id: string | number, state: boolean, e: Event | null) => void;

Parameters​

  • id - (required) string | number - the id of a task
  • state - (required) boolean - true if the task is going to be selected, false - if unselected
  • e - (required) Event | null - a native event object

Example​

gantt.attachEvent("onBeforeTaskMultiSelect", function(id, state, e){
    // some logic here
     return true;
});

Details​

note

This event is defined in the multiselect extension, so you need to activate the multiselect plugin. Read the details in the Multi-Task Selection article.

The event is called for each task of the range.

The event is blockable, returning false will cancel the change of the task selection state.