This solved the issue .
let text = this.barContainer.selectAll('.bar').data(viewModel.dataPoints); text.enter() .append('text') .classed('bartext', true) .text(d => <string>d.value2); text.attr({ y: d => height - 15, x: d => xScale(d.category) + xScale.rangeBand() / 2, 'text-anchor': "middle", fill: "red" });