From 0612246b04c12c10929f809c3c5a56da0780f0c1 Mon Sep 17 00:00:00 2001
From: monikamaheshwari <monikamaheshwari1996@gmail.com>
Date: Sat, 27 Apr 2019 09:15:22 -0400
Subject: Bug 1422680 - simplify aboutReader.css font-size classes using CSS
 variables r=Gijs

---
 toolkit/components/reader/AboutReader.jsm | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

(limited to 'toolkit/components/reader')

diff --git a/toolkit/components/reader/AboutReader.jsm b/toolkit/components/reader/AboutReader.jsm
index 6ec959eba..4cc9d6750 100644
--- a/toolkit/components/reader/AboutReader.jsm
+++ b/toolkit/components/reader/AboutReader.jsm
@@ -276,13 +276,10 @@ AboutReader.prototype = {
   },
 
   _setFontSize(newFontSize) {
-    let containerClasses = this._containerElement.classList;
-
-    if (this._fontSize > 0)
-      containerClasses.remove("font-size" + this._fontSize);
-
     this._fontSize = newFontSize;
-    containerClasses.add("font-size" + this._fontSize);
+    let size = (10 + 2 * this._fontSize) + "px";
+
+    this._containerElement.style.setProperty("--font-size", size);
     return AsyncPrefs.set("reader.font_size", this._fontSize);
   },
 
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