From becb6ce346a69fccccb1828e289ae4e4d3af8535 Mon Sep 17 00:00:00 2001
From: ysds <fellows3@gmail.com>
Date: Sun, 21 Oct 2018 17:01:22 +0900
Subject: Add dropdown responsive alignment (#26255)

---
 site/docs/4.1/components/dropdowns.md | 38 +++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

(limited to 'site/docs')

diff --git a/site/docs/4.1/components/dropdowns.md b/site/docs/4.1/components/dropdowns.md
index ab61390d4..552631337 100644
--- a/site/docs/4.1/components/dropdowns.md
+++ b/site/docs/4.1/components/dropdowns.md
@@ -616,6 +616,44 @@ By default, a dropdown menu is automatically positioned 100% from the top and al
 {% endcapture %}
 {% include example.html content=example %}
 
+### Responsive alignment
+
+If you want to use responsive alignment, disable dynamic positioning by adding the `data-display="static"` attribute and use the responsive variation classes.
+
+To align **right** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu{-sm|-md|-lg|-xl}-right`.
+
+{% capture example %}
+<div class="btn-group">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-haspopup="true" aria-expanded="false">
+    Left-aligned but right aligned when large screen
+  </button>
+  <div class="dropdown-menu dropdown-menu-lg-right">
+    <button class="dropdown-item" type="button">Action</button>
+    <button class="dropdown-item" type="button">Another action</button>
+    <button class="dropdown-item" type="button">Something else here</button>
+  </div>
+</div>
+{% endcapture %}
+{% include example.html content=example %}
+
+To align **left** the dropdown menu with the given breakpoint or larger, add `.dropdown-menu-right` and `.dropdown-menu{-sm|-md|-lg|-xl}-left`.
+
+{% capture example %}
+<div class="btn-group">
+  <button type="button" class="btn btn-secondary dropdown-toggle" data-toggle="dropdown" data-display="static" aria-haspopup="true" aria-expanded="false">
+    Right-aligned but left aligned when large screen
+  </button>
+  <div class="dropdown-menu dropdown-menu-right dropdown-menu-lg-left">
+    <button class="dropdown-item" type="button">Action</button>
+    <button class="dropdown-item" type="button">Another action</button>
+    <button class="dropdown-item" type="button">Something else here</button>
+  </div>
+</div>
+{% endcapture %}
+{% include example.html content=example %}
+
+Note that you don't need to add a `data-display="static"` attribute to dropdown buttons in navbars, since Popper.js isn't used in navbars.
+
 ## Menu content
 
 ### Headers
-- 
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