If selector is omitted or is null, the event handler is referred to as direct or directly-bound. In Internet Explorer 8 and lower, a few events such as change and submit do not natively bubble but jQuery patches these to bubble and create consistent cross-browser behavior. The majority of browser events bubble, or propagate, from the deepest, innermost element (the event target) in the document where they occur all the way up to the body and the document element. In other respects, the two forms are identical in their behavior as described below. The value for each key is a function (or false value) that is used as the handler instead of the final argument to the method. The keys are strings in the same form as the events argument with space-separated event type names and optional namespaces. on(), the events argument is a plain object. Namespaces should contain upper/lowercase letters and digits only. Namespaces are similar to CSS classes in that they are not hierarchical only one name needs to match. off('click.simple') without disturbing other click handlers attached to the elements. A click event handler attached via that string could be removed with. For example, '' defines both the myPlugin and simple namespaces for this particular click event.

Event names should only contain alphanumerics, underscore, and colon characters.Īn event name can be qualified by event namespaces that simplify removing or triggering the event.

trigger() method can trigger both standard browser event names and custom event names to call attached handlers. jQuery will pass through the browser's standard JavaScript event types, calling the handler function when the browser generates events due to user actions such as click. one() Event names and namespacesĪny event names can be used for the events argument. To attach an event that runs only once and then removes itself, see. For help in converting from older jQuery event methods, see. on() method provides all functionality required for attaching event handlers. on() method attaches event handlers to the currently selected set of elements in the jQuery object.

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