Chart.js 2.0 Formatting Y Axis with Currency and Thousands Separator

Question

I am having problems with formatting my chart axis and I am not able to find an example for the updated version 2.0.

How can I (for example) make 2000000 to €2.000.000?<

Answer 1

For those using Version: 2.5.0, here is an enhancement. With this, you can also format the amounts in tooltips of the chart, not only the 'ticks' in the 'yAxes'

...
options: {
    scales: {
        yAxes: [{
            ticks: {
                beginAtZero:true,
                callback: function(value, index, values) {
                    return '$ ' + number_format(value);
                }
            }
        }]
    },
    tooltips: {
        callbacks: {
            label: function(tooltipItem, chart){
                var datasetLabel = chart.datasets[tooltipItem.datasetIndex].label || '';
                return datasetLabel + ': $ ' + number_format(tooltipItem.yLabel, 2);
            }
        }
    }
}

Here is the number_format() function what I am using:

function number_format(number, decimals, dec_point, thousands_sep) {
// *     example: number_format(1234.56, 2, ',', ' ');
// *     return: '1 234,56'
    number = (number + '').replace(',', '').replace(' ', '');
    var n = !isFinite(+number) ? 0 : +number,
            prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),
            sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,
            dec = (typeof dec_point === 'undefined') ? '.' : dec_point,
            s = '',
            toFixedFix = function (n, prec) {
                var k = Math.pow(10, prec);
                return '' + Math.round(n * k) / k;
            };
    // Fix for IE parseFloat(0.55).toFixed(0) = 0;
    s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');
    if (s[0].length > 3) {
        s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep);
    }
    if ((s[1] || '').length < prec) {
        s[1] = s[1] || '';
        s[1] += new Array(prec - s[1].length + 1).join('0');
    }
    return s.join(dec);
}