jquery - outerHeight() method returning a string data type instead of a number data type -

i need jquery method of outerheight() return number data type instead of string data type.

var firsttd = $.trim($(this).find("td:first").outerheight()); alert(typeof firsttd); // output ---> string  alert(firsttd); // output ---> 58 

and triedusing parseint

var firsttd = $.trim(parseint($(this).find("td:first").outerheight()),10); alert(typeof firsttd); // output ---> string  alert(firsttd); // output ---> 58 

how can output number data type?

you can removing $.trim() around rest of code. you're receiving integer, there's nothing more trim it. so, use this:

var firsttd = $(this).find("td:first").outerheight(); alert(typeof firsttd); // output ---> number alert(firsttd); // output ---> 58