From fcf6e81430981fca3ce8a71b193ac3c4c4da4680 Mon Sep 17 00:00:00 2001
From: Kai Volland <kaivolland@yahoo.de>
Date: Fri, 8 Mar 2019 11:29:36 +0100
Subject: [PATCH] Fixes issue with ScaleLine

Math.pow with negative exponents is inaccurate in chrome v74. `toFixed`
is called on the result to fix this.
---
 src/ol/control/ScaleLine.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/ol/control/ScaleLine.js b/src/ol/control/ScaleLine.js
index f7d349f21a..57902cb09c 100644
--- a/src/ol/control/ScaleLine.js
+++ b/src/ol/control/ScaleLine.js
@@ -260,10 +260,11 @@ class ScaleLine extends Control {
 
     let i = 3 * Math.floor(
       Math.log(this.minWidth_ * pointResolution) / Math.log(10));
-    let count, width;
+    let count, width, decimalCount;
     while (true) {
-      count = LEADING_DIGITS[((i % 3) + 3) % 3] *
-          Math.pow(10, Math.floor(i / 3));
+      decimalCount = Math.floor(i / 3);
+      const decimal = Math.pow(10, decimalCount);
+      count = LEADING_DIGITS[((i % 3) + 3) % 3] * decimal;
       width = Math.round(count / pointResolution);
       if (isNaN(width)) {
         this.element.style.display = 'none';
@@ -274,12 +275,11 @@ class ScaleLine extends Control {
       }
       ++i;
     }
-
     let html;
     if (this.scaleBar_) {
       html = this.createScaleBar(width, count, suffix);
     } else {
-      html = count + ' ' + suffix;
+      html = count.toFixed(decimalCount < 0 ? -decimalCount : 0) + ' ' + suffix;
     }
 
     if (this.renderedHTML_ != html) {