calculateDuration

calculates the duration of a task

number calculateDuration(object | Date config, [Date end_date] );

config	object \| Date	either the configuration object of a time span or the start date of the task
end_date	Date	optional, the end date of the task. The parameter is required when the first parameter is specified as start_date.

number

the duration of a task in units specified by the duration_unit option

Example

gantt.config.work_time = true;
gantt.init("gantt_here");
 
// calculate worktime duration between specified dates 
// (for specific task, if multiple working calendars used)
gantt.calculateDuration({
    start_date: new Date(2013,02,15), 
    end_date: new Date(2013,02,25)
    /*,task: task*/
});
 
// or 
gantt.calculateDuration(task);
 
// or 
gantt.calculateDuration(new Date(2013,02,15), new Date(2013,02,25)); //->6

Details

If the work_time option is enabled, the method calculates the task's duration in working time.

The method will use the global work time calendar if no task is specified.
Besides, the method can be called directly for a calendar object.

Configuration object properties

The configuration object can contain the following properties:

start_date - (Date) the date when a task is scheduled to begin
end_date - (Date) the date when a task is scheduled to be completed
task - (object) optional, the object of the task the duration of which should be calculated