From c2271ff52a5fca644dbb3a8f8edc3a0ca97d5b49 Mon Sep 17 00:00:00 2001
From: nciont <nciont@users.noreply.github.com>
Date: Wed, 9 Jan 2019 22:08:31 +0300
Subject: [PATCH 1/3] fix: handle empty placeholder case from #7138

---
 src/platforms/web/runtime/modules/attrs.js     |  2 +-
 .../features/directives/model-text.spec.js     | 18 +++++++++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/platforms/web/runtime/modules/attrs.js b/src/platforms/web/runtime/modules/attrs.js
index 61d004ed239..e7e021ea279 100644
--- a/src/platforms/web/runtime/modules/attrs.js
+++ b/src/platforms/web/runtime/modules/attrs.js
@@ -98,7 +98,7 @@ function baseSetAttr (el, key, value) {
     if (
       isIE && !isIE9 &&
       (el.tagName === 'TEXTAREA' || el.tagName === 'INPUT') &&
-      key === 'placeholder' && !el.__ieph
+      key === 'placeholder' && value !== '' && !el.__ieph
     ) {
       const blocker = e => {
         e.stopImmediatePropagation()
diff --git a/test/unit/features/directives/model-text.spec.js b/test/unit/features/directives/model-text.spec.js
index 69e9851368a..7fdf115ea49 100644
--- a/test/unit/features/directives/model-text.spec.js
+++ b/test/unit/features/directives/model-text.spec.js
@@ -437,8 +437,8 @@ describe('Directive v-model text', () => {
     })
   }
 
-  // #7138
   if (isIE && !isIE9) {
+    // #7138
     it('should not fire input on initial render of textarea with placeholder in IE10/11', done => {
       const el = document.createElement('div')
       document.body.appendChild(el)
@@ -452,5 +452,21 @@ describe('Directive v-model text', () => {
         done()
       }, 17)
     })
+
+    // #9042
+    it('should not block the first input event when placeholder is empty', done => {
+      const el = document.createElement('div')
+      document.body.appendChild(el)
+      const vm = new Vue({
+        el,
+        data: { evtCount: 0 },
+        template: `<input placeholder="" @input="evtCount++"></textarea>`,
+      })
+      triggerEvent(vm.$el, 'input')
+      setTimeout(() => {
+        expect(vm.evtCount).toBe(1)
+        done()
+      }, 17)
+    })
   }
 })

From e60a9a541368860cd15cf4d6e07c7a57a3a9fd99 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 4 Feb 2019 17:33:16 -0500
Subject: [PATCH 2/3] Update attrs.js

---
 src/platforms/web/runtime/modules/attrs.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/platforms/web/runtime/modules/attrs.js b/src/platforms/web/runtime/modules/attrs.js
index e7e021ea279..2626deb9f6f 100644
--- a/src/platforms/web/runtime/modules/attrs.js
+++ b/src/platforms/web/runtime/modules/attrs.js
@@ -97,7 +97,7 @@ function baseSetAttr (el, key, value) {
     /* istanbul ignore if */
     if (
       isIE && !isIE9 &&
-      (el.tagName === 'TEXTAREA' || el.tagName === 'INPUT') &&
+      el.tagName === 'TEXTAREA' &&
       key === 'placeholder' && value !== '' && !el.__ieph
     ) {
       const blocker = e => {

From 9e58a635bc5bd711f1ef321d7a42f6a563b67744 Mon Sep 17 00:00:00 2001
From: Evan You <yyx990803@gmail.com>
Date: Mon, 4 Feb 2019 17:33:54 -0500
Subject: [PATCH 3/3] Update model-text.spec.js

---
 test/unit/features/directives/model-text.spec.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/unit/features/directives/model-text.spec.js b/test/unit/features/directives/model-text.spec.js
index 7fdf115ea49..7cf5167461f 100644
--- a/test/unit/features/directives/model-text.spec.js
+++ b/test/unit/features/directives/model-text.spec.js
@@ -460,7 +460,7 @@ describe('Directive v-model text', () => {
       const vm = new Vue({
         el,
         data: { evtCount: 0 },
-        template: `<input placeholder="" @input="evtCount++"></textarea>`,
+        template: `<textarea placeholder="" @input="evtCount++"></textarea>`,
       })
       triggerEvent(vm.$el, 'input')
       setTimeout(() => {