Highcharts allowDecimals condition - highcharts

Question

I need to have a check for the difference between y-axis values and if it is less than 5, set yAxis.allowDecimals property to false. How do I grab these yAxis labels values? Is there a good way to do it?
pseudo code:
if((yAxis.values[1] - yAxis.values[0])< 5) yAxis.allowDecimals = false;

Answer 1

You can achieve it by updating the y-axis when yAxis.tickInterval > 5:
chart: {
events: {
load: function() {
var chart = this,
yAxis = chart.yAxis[0];
if (yAxis.tickInterval < 5) {
yAxis.update({
allowDecimals: false
});
}
}
}
}
Demo:
https://jsfiddle.net/BlackLabel/zn9tadq8/1/
API reference:
https://api.highcharts.com/highcharts/chart.events.load
https://api.highcharts.com/class-reference/Highcharts.Axis#update

Answer 2

You can use tickInterval property which is the interval of the tick marks in axis units.
var chart = Highcharts.chart('container', {
series: [{
data: [3,2,6,4,5,6,1]
}]
});
console.log("Tick Interval is :"+chart.yAxis[0].tickInterval);
if(chart.yAxis[0].tickInterval<5){
console.log("Tick Interval is less than 5");
chart.yAxis[0].allowDecimals = false;
}
<script src="https://code.highcharts.com/highcharts.js"></script>
<div id="container" style="height: 400px"></div>
API Reference: https://api.highcharts.com/highcharts/yAxis.tickInterval