jQuery.data parsing string like 10E6 as int (10000000)

Question

Given an element like this <a data-test="10E6"> jQuery interprets the value as an integer in scientific notaion rather than a string as intended when I do elem.data('test')

Given that this is happening in a fairly large application I'm exploring my options for changing this behavior without having to switch to using elem.attr('data-test') everywhere that this may happen.

Since jQuery uses $.isNaN internally before trying to parse the value as a float I could override isNaN adding the regex ^[E\d]+$ like so:

$.isNaN = function( obj ) {
    return obj == null || !$.rdigit.test( obj ) || /E/.test( obj ) || isNaN( obj );
}

or override the much more complex $.data

Does anyone have a better plan?

Tejs · Accepted Answer · 2011-09-26 22:02:21Z

3

According to the documentation of .data() itself, the jQuery developers tell you to use .attr() to retrieve the value without coercing it. I'd imagine overriding the internals that jQuery is using would be a more detrimental problem than simply switching to the appropriate method.

answered Sep 26, 2011 at 22:02

Tejs

41.4k10 gold badges71 silver badges89 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Jake Over a year ago

Thanks. Just going to have to bite the bullet and comb through the code to make all the changes.

Christopher Over a year ago

I couldn't find anything official from the devs, but I have been using .attr() for this (I have customers naming parts "01" and they expect the leading zeroes, which vary in number(!) to be preserved) and it's been working as expected. It seems like a safe thing to do, because data attributes are just attributes, and attr shouldn't care.

Collectives™ on Stack Overflow

jQuery.data parsing string like 10E6 as int (10000000)

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related