Chartjs-Chart.js fix minimum axes?

Set beginAtZero: true for ticks in your options. Here is an example:

var options = {
type: 'bar',
responsive: true,
legend: false,
animation: false,
scales: {
xAxes: [{
display: true,
gridLines: {
display: false
},
}],
yAxes: [{
display: true,
gridLines: {
display: false
},
ticks: {
beginAtZero:true
}
}]
}
};