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getSlack

info

The getSlack method is available in the PRO edition only.

Description​

Checks how much time (in the current duration unit) a task has before it starts to affect other tasks

Parameters​

  • task1 - (required) object - the object of the 1st task to check the slack for
  • task2 - (required) object - the object of the 2nd task to check the slack for

Returns​

  • slack - (number,string) - a slack between tasks in the current duration units or 'Infinity', if tasks are not linked

Example​

const tasks = {
    data:[
       {id:1, text:"Project #1", start_date:"01-04-2013", duration:18, type:"project"},
       {id:2, text:"Task #1", start_date:"02-04-2013",duration:8, parent:1},
       {id:3, text:"Task #2", start_date:"13-04-2013",duration:8, parent:1}
    ],
    links:[
       {id:1, source:1, target:2, type:"1"},
       {id:2, source:2, target:3, type:"0"}
    ]
};
 
gantt.config.highlight_critical_path = true; 
gantt.init("gantt_here");
gantt.parse(tasks);

gantt.getSlack(gantt.getTask(2), gantt.getTask(3)); // -> 1  /*!*/

Details​

warning

The getSlack method is deprecated. Use the following methods to get free/total slack of a task:

gantt.getFreeSlack(task);

gantt.getTotalSlack(task);
note

This method is defined in the critical_path extension, so you need to include it on the page. Read the details in the Critical Path article.