Answer
Use .data(key, value) to store custom metadata.
Keeps state attached to DOM without global variables.
Keeps state attached to DOM without global variables.
Quick Answer
jQuery .data() stores arbitrary data associated with DOM elements: $(".btn").data("userId", 42) stores, $(".btn").data("userId") retrieves. Data is stored in jQuery's internal cache, not in DOM attributes. .removeData() clears it. More reliable than data attributes for storing complex objects and avoids serialization overhead.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ