What does this line of code do? $('ul > li:first-child');

What is the difference between $('p').find('a') and $('p').children('a')?

In some projects, jQuery is not included as a file with an obvious version number (if it has been run through a minifier or other code bundler, for example). How can you detect programmatically what version of jQuery is active?

Which property of the jQuery event object references the DOM object that dispatched an event?

The '#' symbol indicates a lookup on what?

$() is an alias of the jQuery() function

Difference between .width() and .outerWidth()?

What keyword would you use to refer to the object on which the currently executing method has been invoked?

What does every selector expression return?