Add new function dom-remove-node

* doc/lispref/text.texi (Document Object Model): Document
dom-remove-node.

* lisp/dom.el (dom-remove-node): New function.

2 files changed, 14 insertions, 0 deletions

diff --git a/doc/lispref/text.texi b/doc/lispref/text.texi
index 43d4945b68..4dc943f868 100644
--- a/doc/lispref/text.texi
+++ b/doc/lispref/text.texi
@@ -4614,6 +4614,9 @@ to be inserted between the textual elements.
 
 @item dom-parent @var{dom} @var{node}
 Return the parent of @var{node} in @var{dom}.
+
+@item dom-remove @var{dom} @var{node}
+Remove @var{node} from @var{dom}.
 @end table
 
 The following are functions for altering the @acronym{DOM}.
diff --git a/lisp/dom.el b/lisp/dom.el
index 03fe75975a..cf3a02a51d 100644
--- a/lisp/dom.el
+++ b/lisp/dom.el
@@ -139,6 +139,16 @@ ATTRIBUTE would typically be `class', `id' or the like."
 	(cons dom matches)
       matches)))
 
+(defun dom-remove-node (dom node)
+  "Remove NODE from DOM."
+  ;; If we're removing the top level node, just return nil.
+  (dolist (child (dom-children dom))
+    (cond
+     ((eq node child)
+      (delq node dom))
+     ((not (stringp child))
+      (dom-remove-node child node)))))
+
 (defun dom-parent (dom node)
   "Return the parent of NODE in DOM."
   (if (memq node (dom-children dom))
@@ -151,6 +161,7 @@ ATTRIBUTE would typically be `class', `id' or the like."
       result)))
 
 (defun dom-previous-sibling (dom node)
+  "Return the previous sibling of NODE in DOM."
   (when-let (parent (dom-parent dom node))
     (let ((siblings (dom-children parent))
 	  (previous nil))