Omitting the parameter returns the current value (getter), whereas defining the parameter sets the value (setter) and returns the instance itself for easier chaining.
GreenSock Docs
Timeline
.repeat()
Gets or sets the number of times that the timeline should repeat after its first iteration.
Parameters
value: Number
(default = 0
) — Omitting the parameter returns the current value (getter), whereas defining the parameter sets the value (setter) and returns the instance itself for easier chaining.
Returns : *

Details
Gets or sets the number of times that the timeline should repeat after its first iteration.
For example, if repeat
is 1, the timeline will play a total of twice (the initial play plus 1 repeat). To repeat indefinitely, use -1. repeat
should always be an integer.
To cause the repeats to alternate between forward and backward, set yoyo
to true
. To add a time gap between repeats, use repeatDelay
. You can set the initial repeat
value via the vars
parameter, like:
var tl = gsap.timeline({repeat: 2});
This method serves as both a getter and setter. Omitting the parameter returns the current value (getter), whereas defining the parameter sets the value (setter) and returns the instance itself for easier chaining, like myTimeline.repeat(2).yoyo(true).play();
var repeat = myTimeline.repeat(); //gets current repeat value
myTimeline.repeat(2); //sets repeat to 2