jquery offset method doesn't seem to return whole numbers

Question

Hi there,

When using jquery's offset method on an element to get its top offset from the document, it returns me the following for example:

1150.3999938964844

Is there a reason why it does that, and doesn't return a whole number?

Thanks

Answer 1

If it has any dimensions defined as percentages (or any parent does really, unless it's out of the flow) for instance....there's no guarantee it's a whole number :)

Answer 2

Is there a reason why it does that, and doesn't return a whole number?

jQuery.fn.offset = function( options ) {

...

parseFloat( ... )

...

• jQuery source

See also: Floating Point Accuracy Problems at Wikipedia