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This morning, I found out about a very useful jQuery function going by the unassuming name of data. This fantastic little beast creates a data store for an element, and lets you store just about anything in there.
One of the ways in which this can be used is to attach functions to an element, and using them when required. To demonstrate the usefulness of this feature, I wrote two versions of a simple validation system. In one, we use the data function to assign one or more validators to an input box [Example 1: using $(x).data()]. In the other, we iterate over the inputs and check them against validators as needed [Example 2: not using $(x).data()]. Continue reading “Attaching data to elements in jQuery”