Why is the value of data-value="2.0" cast to a String and the value of data-value="2.5" cast to a Number? I can handle this fine within my function. I'm just trying to understand a little more about how Javascript handles Numbers...

We have this 'strange' situation where some product codes, for example 11E6, which are stored in data attributes (ex data-prodcode) are getting converted to 11000000, when retrieved inside jquery click function. Something like this:      <...

I have custom data stored on elements using jQuery.data() method.  <div id="mydiv" data-test='{"1":"apple", "2":"banana"}'>Custom data</div>   I know I can access individual keys of the obje...

Here is a way to append file to FormData :    var data = new FormData();   jQuery.each($('#file')[0].files, function(i, file) {           data.append('file-'+i, file);   });   is it possible to do as below ?       data[i].remove();???...

Let's say I have to remember the initial height of certain element. A common practice I see is to save this value with $.data on that element.  I fail to understand the benefits of this. Why not simply keep a simple variable with that value, or a...

I'm using the html5 "data" attribute on a element, and I want to assign the attribute value to a variable only if it exists and if it's not empty:  var xxx = $(this).data('what') ? $(this).data('what') : 'default_v...

I have an weird issue with jquery data function. Here is the fiddle  As you can see I update the active data but I cannot see the dom data-active attribute value change, although I re-query the active data, It writes the changed value. $.data() do no...

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I am changing the data-demo attribute of a div element and when I want to check it with in another event, it always shows me the initial value of it instead of the current value.  This is the code I am using:  $('#showValue').click(function()...

I often read it's bad practice, because it's hard to maintain, but doing:  document.getElementsByTagName("h1")[0].foo = {"key":"value"};   compared to using the recommended jQuery alterantive:  $.data($(document.getEle...