Maybe using element.find ('# id') will help:
link: function(scope, element, attrs) { var item = element.find('#somechartid'); scope.chart = c3.generate({ bindto: item, data: { columns: [ ['data1', 30, 200, 100, 400, 150, 250], ['data2', 50, 20, 10, 40, 15, 25] ] } }); }
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