javascript - display row tooltip on condtion base on row mouse hover -

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i using code in grid render event display tpl on row mouse hover 

grid.tip = new ext.tooltip({     view: grid.getview(),     target: grid.getview().mainbody,     delegate: '.x-grid3-row',     trackmouse: true,     renderto: ext.getbody(),     showdelay: 1000,     listeners: {         beforeshow: function updatetipbody(tip) {             var = grid.getview().findrowindex(tip.triggerelement);             var viewobj = grid.getstore().getat(i);             var namevar, addressvar, salesorgvar;             if (viewobj.get('error_message') != null && (viewobj.get('error_message')).length > 1) {                  console.log("done..");                 namevar = (viewobj.get('error_message') != null && viewobj.get('error_message') != "") ? (ext.bundle.getmsg('posfileswidget.errorfoldergrid.errorfolder.label') + " : " + viewobj.get('error_message')) : "";                 tip.update(namevar);             } else {                 tip.setsize(0, 0);                 tip.setvisible(false);                 console.log("1..");             }         }     } });

but when message not come display me blank tpl, not want show tooltip please see image

enter image description here

this extjs bug. have call 

tooltip.render(ext.getbody());

at begin of app. , in listener 

return false;

when don't want show tooltip.


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