improve getyAxisLabelsCoords based on formatter

src/modules/dimensions/YAxis.js

@@ -23,6 +23,11 @@ export default class DimYAxis {
     const axesUtils = new AxesUtils(this.dCtx.ctx)
 
     w.config.yaxis.map((yaxe, index) => {
+      const formatterArgs = {
+        seriesIndex: index,
+        dataPointIndex: -1,
+        w,
+      }
       const yS = w.globals.yAxisScale[index]
       let yAxisMinWidth = 0
       if (
@@ -39,20 +44,21 @@ export default class DimYAxis {
       ) {
         let lbFormatter = w.globals.yLabelFormatters[index]
         let minV = yS.niceMin === Number.MIN_VALUE ? 0 : yS.niceMin
-        const longestStr =
-          String(minV).length > String(yS.niceMax).length ? minV : yS.niceMax
+        let val = yS.result.reduce((acc, curr) => {
+          return String(lbFormatter(acc, formatterArgs))?.length >
+            String(lbFormatter(curr, formatterArgs))?.length
+            ? acc
+            : curr
+        }, minV)
+
+        val = lbFormatter(val, formatterArgs)
 
         // the second parameter -1 is the index of tick which user can use in the formatter
-        let val = lbFormatter(longestStr, {
-          seriesIndex: index,
-          dataPointIndex: -1,
-          w,
-        })
         let valArr = val
 
         // if user has specified a custom formatter, and the result is null or empty, we need to discard the formatter and take the value as it is.
         if (typeof val === 'undefined' || val.length === 0) {
-          val = longestStr
+          val = yS.niceMax
         }
 
         if (w.globals.isBarHorizontal) {