The data() method returns String values for custom data-* attributes which contain Number values

[[email protected]…]

The data() method of jQuery returns String values for custom data-* attributes which contain Number values (containing trailing zeroes): ​http://jsfiddle.net/3A5tp/ (see console or html output).

Tested with the latest jQuery versions 1.x and 2.x in the most recent versions of Chrome and Firefox.

Greets

[gibson042]

This is ​by design:

A value is only converted to a number if doing so doesn't change the value's representation. For example, "1E02" and "100.000" are equivalent as numbers (numeric value 100) but converting them would alter their representation so they are left as strings. The string value "100" is converted to the number 100.

You can use parseFloat or numeric cast (e.g., +( $el.data("safe") )) to convert values yourself.