jQuery one() Method

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jQuery one() Method

The jQuery one() method attaches a handler to an event for the elements. The handler is executed at most once per element per event type.

Example

HTML Editor
<!DOCTYPE html> <html lang="en-US"> <head> <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script> </head> <body> <h1>jQuery one() Method</h1> <p>Click on this paragraph to increase its text size. The event will trigger only once.</p> <script> $(document).ready(function(){ $("p").one("click", function(){ $(this).css("font-size","+=5px"); }); }); </script> </body> </html>

Syntax

$(selector).one(events, data, handler);

Parameter Values

ValueTypeExplanation
eventsRequiredSpecifies a string containing one or more JavaScript event types, such as "click" or "submit," or custom event names.
dataOptionalData to be passed to the handler in event.data when an event is triggered.
handlerRequiredSpecifies the function to run when the event occurs.

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