Which function does jQuery provide to remove whitespace from the beginning and end of a string?

What is the proper way to show an element?

How do you test if an element has a specific class?

Which function is used to make a copy of a selected element?

Where does jQuery code run?

What is jQuery used for?

What is the difference between $('header').html() and $('header').text()?

Generally speaking, when used on a web page, how should jQuery be installed, and why?

What does the following line of code do? jQuery('p')

Which jQuery method can be used to make an ajax call?