From 356d5278cdd8309dce0871d40d00b54d90dd4c33 Mon Sep 17 00:00:00 2001
From: LeviDing <imdingxuewen@gmail.com>
Date: Sat, 18 Jul 2020 15:38:36 +0800
Subject: [PATCH 1/4] Fix minor typo error: change when when to when

---
 2-ui/3-event-details/1-mouse-events-basics/article.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/2-ui/3-event-details/1-mouse-events-basics/article.md b/2-ui/3-event-details/1-mouse-events-basics/article.md
index 551bc564..292cae95 100644
--- a/2-ui/3-event-details/1-mouse-events-basics/article.md
+++ b/2-ui/3-event-details/1-mouse-events-basics/article.md
@@ -24,7 +24,7 @@ We've already seen some of these events:
 : Triggers after two clicks on the same element within a short timeframe. Rarely used nowadays.
 
 `contextmenu`
-: Triggers when when the right mouse button is pressed. There are other ways to open a context menu, e.g. using a special keyboard key, it triggers in that case also, so it's not exactly the mouse event.
+: Triggers when the right mouse button is pressed. There are other ways to open a context menu, e.g. using a special keyboard key, it triggers in that case also, so it's not exactly the mouse event.
 
 ...There are several other events too, we'll cover them later.
 

From 0d497c7b34c473839764728bdbfd121fac7811ad Mon Sep 17 00:00:00 2001
From: LeviDing <imdingxuewen@gmail.com>
Date: Sat, 18 Jul 2020 15:55:54 +0800
Subject: [PATCH 2/4] Update article.md

---
 2-ui/3-event-details/1-mouse-events-basics/article.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/2-ui/3-event-details/1-mouse-events-basics/article.md b/2-ui/3-event-details/1-mouse-events-basics/article.md
index 292cae95..3856bf0e 100644
--- a/2-ui/3-event-details/1-mouse-events-basics/article.md
+++ b/2-ui/3-event-details/1-mouse-events-basics/article.md
@@ -34,7 +34,7 @@ As you can see from the list above, a user action may trigger multiple events.
 
 For instance, a left-button click first triggers `mousedown`, when the button is pressed, then `mouseup` and `click` when it's released.
 
-In cases when a single action initiates multiple events, their order is fixed. That is, the handlers are called in the order `mousedown` -> `mouseup` -> `click`. 
+In cases when a single action initiates multiple events, their order is fixed. That is, the handlers are called in the order `mousedown` -> `mouseup` -> `click`.
 
 ```online
 Click the button below and you'll see the events. Try double-click too.

From d0474aea6fee693b19f1350ea5f67a08be059b4e Mon Sep 17 00:00:00 2001
From: LeviDing <imdingxuewen@gmail.com>
Date: Sat, 18 Jul 2020 16:12:22 +0800
Subject: [PATCH 3/4] Update article.md

---
 2-ui/3-event-details/1-mouse-events-basics/article.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/2-ui/3-event-details/1-mouse-events-basics/article.md b/2-ui/3-event-details/1-mouse-events-basics/article.md
index 3856bf0e..b5535bea 100644
--- a/2-ui/3-event-details/1-mouse-events-basics/article.md
+++ b/2-ui/3-event-details/1-mouse-events-basics/article.md
@@ -50,7 +50,7 @@ Also we can see the `button` property that allows to detect the mouse button, it
 
 Click-related events always have the `button` property, which allows to get the exact mouse button.
 
-We usually don't use it for `click` and `contextmenu` events, because the former happens only on left-click, and the latter -- only on right-click. 
+We usually don't use it for `click` and `contextmenu` events, because the former happens only on left-click, and the latter -- only on right-click.
 
 From the other hand, `mousedown` and `mouseup` handlers we may need `event.button`, because these events trigger on any button, so `button` allows to distinguish between "right-mousedown" and "left-mousedown".
 

From 6800c2ac4b0e2b90390f7f192f5e674a7ac0f142 Mon Sep 17 00:00:00 2001
From: LeviDing <imdingxuewen@gmail.com>
Date: Sat, 18 Jul 2020 16:51:56 +0800
Subject: [PATCH 4/4] Update index.html

---
 2-ui/3-event-details/4-mouse-drag-and-drop/ball.view/index.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/2-ui/3-event-details/4-mouse-drag-and-drop/ball.view/index.html b/2-ui/3-event-details/4-mouse-drag-and-drop/ball.view/index.html
index 36219e30..8751c70a 100644
--- a/2-ui/3-event-details/4-mouse-drag-and-drop/ball.view/index.html
+++ b/2-ui/3-event-details/4-mouse-drag-and-drop/ball.view/index.html
@@ -13,7 +13,7 @@
 
 
   <script>
-    ball.onmousedown = function(event) { 
+    ball.onmousedown = function(event) {
       ball.style.position = 'absolute';
       ball.style.zIndex = 1000;
       document.body.appendChild(ball);