Bind an event handler to the "keydown" JavaScript event, or trigger that event on an element. This method is a shortcut for .on( "keydown", handler ) in the first and second variations, and .trigger( "keydown" ) in the third. The keydown event is sent to an element when the user first presses a key on the keyboard. It can be attached to any element, but the event is only sent to the element that has the focus. Focusable elements can vary between brows

Selects all elements that are hidden. Elements can be considered hidden for several reasons: They have a CSS display value of none. They are form elements with type="hidden". Their width and height are explicitly set to 0. An ancestor element is hidden, so the element is not shown on the page. Elements with visibility: hidden or opacity: 0 are considered to be visible, since they still consume space in the layout. During animations that hide an elem

Iterate over a jQuery object, executing a function for each matched element. The .each() method is designed to make DOM looping constructs concise and less error-prone. When called it iterates over the DOM elements that are part of the jQuery object. Each time the callback runs, it is passed the current loop iteration, beginning from 0. More importantly, the callback is fired in the context of the current DOM element, so the keyword this refers to the

Creates a button widget Buttons Buttons are coded with standard HTML input elements, then enhanced by jQuery Mobile to make them more attractive and useable on a mobile device. Form buttons For ease of styling, the framework automatically converts any input element with a type of submit, reset, or button into a custom styled button - there is no need to add the data-role="button" attribute. However, if needed, you can directly call the button p

Display the matched elements. With no parameters, the .show() method is the simplest way to display an element: $( ".target" ).show(); The matched elements will be revealed immediately, with no animation. This is roughly equivalent to calling .css( "display", "block"), except that the display property is restored to whatever it was initially. If an element has a display value of inline, then is hidden and shown, it will once again be displayed inline

CSS Framework The following is a list of the class names used by jQuery UI. The classes are designed to create a visual consistency across an application and allow components to be themeable by jQuery UI ThemeRoller. The class names are split between ui.core.css and ui.theme.css, depending on whether styles are fixed and structural, or themeable (colors, fonts, backgrounds, etc) respectively. Layout Helpers .ui-helper-hidden: Hides content visually and from assistive technologies, such as scr

Encode a set of form elements as a string for submission. The .serialize() method creates a text string in standard URL-encoded notation. It can act on a jQuery object that has selected individual form controls, such as <input>, <textarea>, and <select>: $( "input, textarea, select" ).serialize(); It is typically easier, however, to select the <form> itself for serialization: $( "form" ).on( "submit", function( event ) { even

Selects all the elements that are the nth-child of their parent in relation to siblings with the same element name, counting from the last element to the first. Because jQuery's implementation of :nth- selectors is strictly derived from the CSS specification, the value of n is "1-indexed", meaning that the counting starts at 1. For other selector expressions such as :eq() or :even jQuery follows JavaScript's "0-indexed" counting. Given a single <ul

Insert every element in the set of matched elements before the target. The .before() and .insertBefore() methods perform the same task. The major difference is in the syntax-specifically, in the placement of the content and target. With .before(), the selector expression preceding the method is the container before which the content is inserted. With .insertBefore(), on the other hand, the content precedes the method, either as a selector expression o

An object containing all CSS properties that may be used without a unit. The .css() method uses this object to see if it may append px to unitless values. You can think about jQuery.cssNumber as a list of all CSS properties you might use without a unit. It's used by .css() to determine if it needs to add px to unitless values. The keys of the jQuery.cssNumber object are camel-cased and the values are all set to true. If you want to prevent the .css()