Check out this simple example on jsfiddle
<div id ="a" data-siteid="00005">00005 turns into:</div>
<div id="b" data-siteid="S00005">S00005 turns into: </div>
code
$('#a').append($('#a').data("siteid"));
$('#b').append($('#b').data("siteid"));
result
00005 turns into:5
S00005 turns into: S00005
I would like to return "00005" and "S00005".
Try
$('#a').append($('#a').attr('data-siteid'));
$('#b').append($('#b').attr('data-siteid'));
Every attempt is made to convert the string to a JavaScript value (this includes booleans, numbers, objects, arrays, and null) otherwise it is left as a string. To retrieve the value's attribute as a string without any attempt to convert it, use the attr() method.
Every attempt is made to convert the string to a JavaScript value (this includes booleans, numbers, objects, arrays, and null) otherwise it is left as a string. To retrieve the value's attribute as a string without any attempt to convert it, use the attr() method.
From here: http://api.jquery.com/data/#data-html5
JQuery returns integer if you have a value as a string, i.e. "one integer value", i.e. "100", if it is not, i.e. "0, 3" then it returns it as string. Beware, JQuery's data() function doesn't always return what you expect, check the type and process it.I hope this helps too.
if (typeof( $("xyz").data() ) == 'number') {
do Something
}
else {
do Something else
}
I know this is a slightly older post, but another way you can approach this is to convert the data attribute value to a string:
$('#a').data("siteid").toString()
or
$('#a').data().siteid.toString()
Some examples of how this can work:
> (12345).toString()
"12345"
> (14.5).toString()
"14.5"
> (-14.5).toString()
"-14.5"
> "bob".toString()
"bob"
> (true).toString()
"true"
> ({a: "b"}).toString()
"[object Object]"
>(function(){console.log("bob")}).toString()
"function (){console.log("bob")}"
The parenthesis in the example are there to avoid assigning variables, since you cannot directly use #toString on the number directly: 123.toString(), but you can when it assigned to a variable or enclosed in parenthesis: (123).toString().
Just remember that you won't be able to convert null or undefined to a string.
Also something interesting happens with arrays and undefined and null values:
> (["bob", 123, true, null, undefined, this]).toString()
"bob,123,true,,,[object Window]"
00005. When reading from data it'll become 5 (because of the implicit conversion) and then the toString will make it "5".
S00005is used to force returning a string and that this should show that00005is converted to a number.