29👍
✅
The Fix
Assign a function into userCallback when creating the config object. This gets called when creating the tick marks. You can find documentation at Chart.js at the bottom of Scales Documentation
yAxes: [{
ticks: {
beginAtZero: true,
stepSize: 500000,
// Return an empty string to draw the tick line but hide the tick label
// Return `null` or `undefined` to hide the tick line entirely
userCallback: function(value, index, values) {
// Convert the number to a string and splite the string every 3 charaters from the end
value = value.toString();
value = value.split(/(?=(?:...)*$)/);
// Convert the array to a string and format the output
value = value.join('.');
return '€' + value;
}
}
}]
6👍
For those using Version: 2.5.0, here is an enhancement. With this, you can also format the amounts in tooltips of the chart, not only the ‘ticks’ in the ‘yAxes’
...
options: {
scales: {
yAxes: [{
ticks: {
beginAtZero:true,
callback: function(value, index, values) {
return '$ ' + 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);
}
3👍
Instead a new function you can use a native javascript NumberFormat
yAxes: [{
ticks: {
beginAtZero: true,
callback: function(value, index, values) {
return '€ ' + Intl.NumberFormat().format((value/1000)) + 'K';
}
}
}]
//2000000 => € 2,000K
Source:stackexchange.com