From f92be2a9257b57675850eb2414fe3624ce856aad Mon Sep 17 00:00:00 2001
From: Miles Malerba <mmalerba@google.com>
Date: Thu, 22 Dec 2016 16:57:09 -0800
Subject: [PATCH] fix(input): fix placeholder for number input with bad input.

---
 src/lib/input/input-container.ts | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/lib/input/input-container.ts b/src/lib/input/input-container.ts
index 37d18f2ff0db..06822a7fd606 100644
--- a/src/lib/input/input-container.ts
+++ b/src/lib/input/input-container.ts
@@ -124,7 +124,21 @@ export class MdInputDirective implements AfterContentInit {
    */
   @Output() _placeholderChange = new EventEmitter<string>();
 
-  get empty() { return (this.value == null || this.value === '') && !this._isNeverEmpty(); }
+  get empty() {
+    if (this._isNeverEmpty()) {
+      return false;
+    }
+    if (this.value == null || this.value === '') {
+      // Check if this is an <input> element that contains bad input.
+      // If so, we know that it only appears empty because the value failed to parse.
+      if (this._elementRef.nativeElement instanceof HTMLInputElement &&
+          this._elementRef.nativeElement.validity.badInput) {
+        return false;
+      }
+      return true;
+    }
+    return false;
+  }
 
   focused = false;