This video explains about jquery chaining methods/actions.
using jquery, you can chain together methods or actions
jquery Chaining allows you to perform multiple jquery methods within a single statement.
you can chain methods using dot(.) behind every method call.
Example :
$("div.testclass").css("color", "red").slideUp(2000)fadeIn(2000).slideDown(2000);
you should try these cases on your machine and also do try few crazy scenarios if you can.
If you get stuck or if you have any query then please do comment below and let me know.
I will try to reply you as soon as possible.