jQuery .data can access camel case key using dash

Question

Can anyone explain why this works:$('#someId').data('typeId', 2); $('#someId').data('type-id'); // will return 2

Here is the fiddle as well: http://jsfiddle.net/L6nLpgdb/

Thank you !

read [html5 dataset](https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement.dataset) - `for any dash (U+002D) followed by an ASCII lowercase letter a to z, the dash is removed and the letter is transformed into its uppercase counterpart;` - so it is because the spec says so — Arun P Johny, Aug 20 '14 at 11:23

score 1 · Accepted Answer · edited May 23 '17 at 10:33

1

check this link

The custom data attributes is transformed to a key for the DOMStringMap entry with the following rules:

    any dash (U+002D) is removed;
    any letter following a dash (U+002D), before its removal, is set in its uppercase counterpart.

edited May 23 '17 at 10:33

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answered Aug 20 '14 at 11:28

Amit Soni

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jQuery .data can access camel case key using dash

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