.addClass()

Adds the specified class(es) to each element in the set of matched elements.

    $(selector).addClass("class")

.hasClass()

Determine whether any of the matched elements are assigned the given class.

    $(selector).hasClass("class")

.removeClass()

Remove a single class, multiple classes, or all classes from each element in the set of matched elements.

    $(selector).removeClass("class")

.toggleClass()

Add or remove one or more classes from each element in the set of matched elements, depending on either the class’s presence or the value of the state argument.

    $(selector).toggleClass("class")

.css( propertyName )

Get the computed style properties for the first element in the set of matched elements.

    $(selector).css("propertyName")

.css( propertyName, propertyValue )

Set the computed style properties for the first element in the set of matched elements.

    $(selector).css("propertyName","propertyValue")

.css( object )

Set the computed style properties for the first element in the set of matched elements.

object: { propertyName: propertyValue}

    $(selector).css({
        propertyName1:propertyValue1,
        propertyName2:propertyValue2
    })

.offset()

Get the current coordinates of the first element, or set the coordinates of every element, in the set of matched elements, relative to the document.

    $(selector).offset()

return as object {width: width, height: height, left: left, top: top}