Should hasClass precede removeClass - jQuery -


is necessary check if class exists before use removeclass api on jquery object? eg.

if($(this).hasclass("test"))    $(this).removeclass("test");

or

$(this).removeclass("test");

if not necessary, why so?

use this:

$(this).removeclass("test");

there no need check class existence.

from jquery sources can see removeclass method uses replace method remove substring:

classname = (" " + elem.classname + " ").replace(rclass, " "); (c = 0, cl = classnames.length; c < cl; c++) {     classname = classname.replace(" " + classnames[c] + " ", " "); }​

and replace won't remove if matching substring not exist.


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