Do not autofocus text fields on page load on mobile devices. This is currently broken in many mobile browsers:

johnbillion · johnbillion · commit b94e8dc079d5 · 2014-12-16T15:51:54.000Z
- iOS Safari opens the keyboard and auto-scrolls on the first tap anywhere on the screen triggering the click at an unexpected place. That makes it impossible to follow links or press buttons. - Chrome on iOS opens the keyboard on load and may scroll the focused field off screen. - The Android 4.4 browser only highlights the field, the user has to tap it to open the keyboard and type. Merges [30842] to the 4.1 branch. See #30703. git-svn-id: https://develop.svn.wordpress.org/branches/4.1@30908 602fd350-edb4-49c9-b593-d223f7449a82
diff --git a/src/wp-admin/edit-form-advanced.php b/src/wp-admin/edit-form-advanced.php
@@ -647,7 +647,7 @@
 	wp_comment_reply();
 ?>
 
-<?php if ( post_type_supports( $post_type, 'title' ) && '' === $post->post_title ) : ?>
+<?php if ( ! wp_is_mobile() && post_type_supports( $post_type, 'title' ) && '' === $post->post_title ) : ?>
 <script type="text/javascript">
 try{document.post.title.focus();}catch(e){}
 </script>
diff --git a/src/wp-admin/edit-form-comment.php b/src/wp-admin/edit-form-comment.php
@@ -155,6 +155,8 @@
 </div>
 </form>
 
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.post.name.focus();}catch(e){}
 </script>
+<?php endif;
diff --git a/src/wp-admin/edit-tag-form.php b/src/wp-admin/edit-tag-form.php
@@ -200,6 +200,9 @@
 ?>
 </form>
 </div>
+
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.forms.edittag.name.focus();}catch(e){}
 </script>
+<?php endif;
diff --git a/src/wp-admin/edit-tags.php b/src/wp-admin/edit-tags.php
@@ -583,10 +583,14 @@
 
 </div><!-- /col-container -->
 </div><!-- /wrap -->
+
+<?php if ( ! wp_is_mobile() ) : ?>
 <script type="text/javascript">
 try{document.forms.addtag['tag-name'].focus();}catch(e){}
 </script>
 <?php
+endif;
+
 $wp_list_table->inline_edit();
 
 include( ABSPATH . 'wp-admin/admin-footer.php' );
