javascript - Add class to element depending on which side of the screen its on -


i making timeline theme , need have separate class posts on right side of screen , left side of screen. don't see wrong javascript of course not working. 

var halfscreenwidth = jquery(document).width() * 0.5; var timelinepost = jquery('.blog .post');  jquery(document).ready( function(){     timelinepost.each( function(){        if( this.position().left < halfscreenwidth ){            jquery(this).addclass('timeline-left');        } else{            jquery(this).addclass('timeline-right');        }     }); });

made few modifications @ https://jsfiddle.net/zlv4s0ur/26/ .

if( this.position().left < halfscreenwidth )

should

if( jquery(this).position().left < halfscreenwidth )


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