javascript - Change in copied object reflects in source cell on handontable drag -

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i having object 

  var x1 = {t1: 'test1', y1: 'testy1'};   var x2 = {t1: 'test2', y1: 'testy2'};   var x3 = {t1: 'test3', y1: 'testy3'};    var data = [       {id: 1, name: 'ted', isactive: x1},       {id: 2, name: 'john', isactive: x2},       {id: 3, name: 'al', isactive: x3}     ]

i bind data handontable. want modification in destination object on drag.

beforeautofill = function (start, end, data) {                 data[0][0].t1 = 'tt1';              };

this code should change row 1, test2 tt1.

but changes both rows(0 , 1) tt1.

i think issue of shallow copy object of source.

http://jsfiddle.net/hemantmalpote/llyd9d7s/


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