I have a chart with columnrange type which should display some timelines. I have my time in UTC. It displays well on yAxis because of property 'type: "datetime"', but in tooltip it displays time in seconds. I want to format it.
I was trying to use constructions like this:
formatter() {
}
or like this:
formatter: function() {
}
but they are not allowed here and all I get is an error "'type' is declared here"
The only available way to use formatter for me is:
formatter: (ctx) => {
}
Where ctx refers to Highcharts.tooltips. But, arrow function does not allow me to get the y value by using this keyword. Please, tell me, what should I try?
I was trying different ways to use function() in order to access this.y and found the solution:
tooltip: {
formatter: function(ctx) {
}
}
All the ways works fine, I just need to pass context variable to function, either formatter(ctx): {} or formatter: function(ctx) {}