From af8fbc16d67c7a628374a3442592a3cf2baa58ff Mon Sep 17 00:00:00 2001
From: tomxwang <289758716@qq.com>
Date: Thu, 28 Apr 2022 22:04:57 +0800
Subject: [PATCH] no value should use decimals (#48155)

---
 packages/grafana-data/src/valueFormats/valueFormats.test.ts | 3 +++
 packages/grafana-data/src/valueFormats/valueFormats.ts      | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/packages/grafana-data/src/valueFormats/valueFormats.test.ts b/packages/grafana-data/src/valueFormats/valueFormats.test.ts
index 202eeccfe4d..1ad66c8fdff 100644
--- a/packages/grafana-data/src/valueFormats/valueFormats.test.ts
+++ b/packages/grafana-data/src/valueFormats/valueFormats.test.ts
@@ -103,6 +103,9 @@ describe('valueFormats', () => {
 
       expect(toFixed(100.4, 2)).toBe('100.40');
       expect(toFixed(100.5, 2)).toBe('100.50');
+
+      expect(toFixed(0, 1)).toBe('0.0');
+      expect(toFixed(0, 2)).toBe('0.00');
     });
   });
 
diff --git a/packages/grafana-data/src/valueFormats/valueFormats.ts b/packages/grafana-data/src/valueFormats/valueFormats.ts
index c0ea18dfd31..805f53fa740 100644
--- a/packages/grafana-data/src/valueFormats/valueFormats.ts
+++ b/packages/grafana-data/src/valueFormats/valueFormats.ts
@@ -56,6 +56,10 @@ export function toFixed(value: number, decimals?: DecimalCount): string {
     decimals = getDecimalsForValue(value);
   }
 
+  if (value === 0) {
+    return value.toFixed(decimals);
+  }
+
   const factor = decimals ? Math.pow(10, Math.max(0, decimals)) : 1;
   const formatted = String(Math.round(value * factor) / factor);