A helper function to draw values on a chart created using ChartJS.

drawBarValues.js

var drawBarValues = function(el) {
	var ctx;
	ctx = el.chart.ctx;
	ctx.font = Chart.helpers.fontString(Chart.defaults.global.defaultFontSize, 'normal', Chart.defaults.global.defaultFontFamily);
	ctx.fillStyle = el.chart.config.options.defaultFontColor;
	ctx.textAlign = 'center';
	ctx.textBaseline = 'bottom';
	el.data.datasets.forEach(function(dataset) {
		var i, model, originalValue;
		i = 0;
		while (i < dataset.data.length) {
			if (dataset.hidden === true && dataset._meta[Object.keys(dataset._meta)[0]].hidden !== false) {
				i++;
				continue;
			}
			model = dataset._meta[Object.keys(dataset._meta)[0]].data[i]._model;
			ctx.fillText(dataset.data[i], model.x - 1, model.y - 5);
			i++;
		}
	});
};