Selects all elements that are descendants of a given ancestor. A descendant of an element could be a child, grandchild, great-grandchild, and so on, of that element. jQuery( "ancestor descendant" ) version added: 1.0 Examples: Mark all inputs that are descendants of a form with a dotted blue

Indicates whether the META key was pressed when the event fired. Returns a boolean value (true or false) that indicates whether or not the META key was pressed at the time the event fired. This key might map to an alternative key name on some platforms. On Macintosh keyboards, the META key maps to the Command key (â). On Windows keyboards, the META key maps to the Windows key. event.metaKey

Creates a slider widget Slider To add a slider widget to your page, use a standard input with the type="range" attribute. The input's value is used to configure the starting position of the handle and the value is populated in the text input. Specify min and max attribute values to set the slider's range. If you want to constrain input to specific increments, add the step attribute. Set the value attribute to define the initial value. The frame

Determine whether the argument is an array. $.isArray() returns a Boolean indicating whether the object is a JavaScript array (not an array-like object, such as a jQuery object). jQuery.isArray( obj ) version added: 1.3 obj Object Object to test whethe

Determine whether an element has any jQuery data associated with it. The jQuery.hasData() method provides a way to determine if an element currently has any values that were set using jQuery.data(). If no data is associated with an element (there is no data object at all or the data object is empty), the method returns false; otherwise it returns true. The primary advantage of jQuery.hasData(element) is that it does not create and associate a data obj

Virtualized mouseout event handler. We provide a set of "virtual" mouse events that attempt to abstract away mouse and touch events. This allows the developer to register listeners for the basic mouse events, such as mousedown, mousemove, mouseup, and click, and the plugin will take care of registering the correct listeners behind the scenes to invoke the listener at the fastest possible time for that device. In touch environments, the plugin r

Select all elements at an index greater than index within the matched set. index-related selectors The index-related selector expressions (including this "greater than" selector) filter the set of elements that have matched the expressions that precede them. They narrow the set down based on the order of the elements within this matched set. For example, if elements are first selected with a class selector (.myclass) and four elements are returned,

Determine whether the argument is a window. This is used in a number of places in jQuery to determine if we're operating against a browser window (such as the current window or an iframe). jQuery.isWindow( obj ) version added: 1.4.3 obj PlainObject Obj

Remove the whitespace from the beginning and end of a string. The $.trim() function removes all newlines, spaces (including non-breaking spaces), and tabs from the beginning and end of the supplied string. If these whitespace characters occur in the middle of the string, they are preserved. jQuery.trim( str ) version added: 1.0

The blind effect hides or shows an element by wrapping the element in a container, and "pulling the blinds" The container has overflow: hidden applied, so height changes affect what's visible. blind direction (default: "up") String The direction the blind will be pulled to hide the e