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Store arbitrary data associated with the matched elements. Prior to jQuery 1. If you are using third-party plugins it may not be advisable to completely replace the element's data object, since plugins may have also set data.
Due to the way browsers interact with plugins and external code, the. We can retrieve several distinct values for a single element one at a time, or as a set:. The above lines alert the data values that were set on the body element. If no data at all was set on that element, undefined is returned. As of jQuery 1. The treatment of attributes with embedded dashes was changed in jQuery 1. The second statement of the code above correctly refers to the data-last-value attribute of the element.
In case no data is stored with the passed key, jQuery searches among the attributes of the element, converting a camel-cased string into a dashed string and then prepending data- to the result.
To retrieve the value's attribute as a string without any attempt to convert it, use the attr method. The data- attributes are pulled in the first time the data property is accessed and then are no longer accessed or mutated all data values are then stored internally in jQuery. This object can be safely cached in a variable as long as a new object is not set with.
Using the object directly to get or set values is faster than making individual calls to. Store arbitrary data associated with the matched elements or return the value at the named data store for the first element in the set of matched elements.
We can set several distinct values for a single element and retrieve them later: Note that this method currently does not provide cross-platform support for setting data on XML documents, as Internet Explorer does not allow data to be attached via expando properties.
Store then retrieve a value from the div element. We can retrieve several distinct values for a single element one at a time, or as a set: Get the data named "blah" stored at for an element.