How to use

extendObservable

function

in

mobservable

constructor({ fromTask, toTask, id = uniqueId('arrow_') }) {
  invariant(fromTask instanceof Task && toTask instanceof Task,
       'Arrow requires `to` and `from` to be Task instances.');
  invariant(fromTask !== toTask,
       '`fromTask` and `toTask` in Arrow Model must be unique.');
  extendObservable(this, {
   fromTask,
   toTask
  });

  this.id = id;
 }

constructor() {
  extendObservable(this, {
   tasks: [],
   arrows: [],
   selectedTask: null,
   windowDimensions: this.getWindowDimesions()
  });

  window.addEventListener('resize', () => {
   this.windowDimensions = this.getWindowDimesions();
  }, false);
 }

constructor({ x, y, name, id = uniqueId('task_') }) {
  const taskName = name ? name : id;
  extendObservable(this, {
   x,
   y,
   name: taskName
  });

  this.id = id;
 }