What is a setIntervals function in JavaScript?

Answer 1

Set interval is used to call a function repeatedly after an interval elapses.

var intervalID = window.setInterval(func, delay[, param1, param2, ...]);

Here is an example. A variable is declared and named intervalID, then it is set to the window method setInterval. Then setInterval takes the function you want to call, and the actual time the interval takes to pass.