From 0c98c78b6899d3b524c02e58d14669e1dbe0694b Mon Sep 17 00:00:00 2001
From: Alexandre Fauquette <45398769+alexfauquette@users.noreply.github.com>
Date: Wed, 10 Jul 2024 12:57:02 +0200
Subject: [PATCH] [charts] Fix area with log scale (#13791)

---
 packages/x-charts/src/LineChart/AreaPlot.tsx | 8 +++++++-
 packages/x-charts/src/LineChart/extremums.ts | 3 ++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/packages/x-charts/src/LineChart/AreaPlot.tsx b/packages/x-charts/src/LineChart/AreaPlot.tsx
index daa51ea9d69a..edf60f0893ad 100644
--- a/packages/x-charts/src/LineChart/AreaPlot.tsx
+++ b/packages/x-charts/src/LineChart/AreaPlot.tsx
@@ -91,7 +91,13 @@ const useAggregatedData = () => {
         }>()
           .x((d) => xScale(d.x))
           .defined((_, i) => connectNulls || data[i] != null)
-          .y0((d) => d.y && yScale(d.y[0])!)
+          .y0((d) => {
+            const value = d.y && yScale(d.y[0])!;
+            if (Number.isNaN(value)) {
+              return yScale.range()[0];
+            }
+            return value;
+          })
           .y1((d) => d.y && yScale(d.y[1])!);
 
         const curve = getCurveFactory(series[seriesId].curve);
diff --git a/packages/x-charts/src/LineChart/extremums.ts b/packages/x-charts/src/LineChart/extremums.ts
index 5393d4e3ba70..56f972dfdeba 100644
--- a/packages/x-charts/src/LineChart/extremums.ts
+++ b/packages/x-charts/src/LineChart/extremums.ts
@@ -41,7 +41,8 @@ export const getExtremumY: ExtremumGetter<'line'> = (params) => {
         const { area, stackedData } = series[seriesId];
         const isArea = area !== undefined;
 
-        const getValues: GetValuesTypes = isArea ? (d) => d : (d) => [d[1], d[1]]; // Since this series is not used to display an area, we do not consider the base (the d[0]).
+        const getValues: GetValuesTypes =
+          isArea && axis.scaleType !== 'log' ? (d) => d : (d) => [d[1], d[1]]; // Since this series is not used to display an area, we do not consider the base (the d[0]).
 
         const seriesExtremums = getSeriesExtremums(getValues, stackedData);