From 4bdbf44b4f07b45961ad2734a3dd3ecac0789c4c Mon Sep 17 00:00:00 2001
From: crisbeto <crisbeto@abv.bg>
Date: Mon, 22 Oct 2018 22:23:45 +0200
Subject: [PATCH] fix(checkbox): disabled property not being coerced

Fixes the `disabled` property not being coerced like all the other components.

Fixes #13739.
---
 src/lib/checkbox/checkbox.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/lib/checkbox/checkbox.ts b/src/lib/checkbox/checkbox.ts
index 040e9bd9a93c..c30bc5a6ab79 100644
--- a/src/lib/checkbox/checkbox.ts
+++ b/src/lib/checkbox/checkbox.ts
@@ -245,8 +245,10 @@ export class MatCheckbox extends _MatCheckboxMixinBase implements ControlValueAc
   @Input()
   get disabled() { return this._disabled; }
   set disabled(value: any) {
-    if (value != this.disabled) {
-      this._disabled = value;
+    const newValue = coerceBooleanProperty(value);
+
+    if (newValue !== this.disabled) {
+      this._disabled = newValue;
       this._changeDetectorRef.markForCheck();
     }
   }