diff --git a/pyhtml/__tag_base.py b/pyhtml/__tag_base.py
index 456a2bb..6ba97ab 100644
--- a/pyhtml/__tag_base.py
+++ b/pyhtml/__tag_base.py
@@ -18,7 +18,7 @@ def __init__(self, *children: Any, **properties: Any) -> None:
"""
Create a new tag instance
"""
- self.children = list(children)
+ self.children = util.flatten_list(list(children))
"""Children of this tag"""
self.properties = util.filter_properties(properties)
@@ -34,7 +34,7 @@ def __call__(
properties are based on this original tag, but with additional children
appended and additional properties unioned.
"""
- new_children = self.children + list(children)
+ new_children = self.children + util.flatten_list(list(children))
new_properties = self.properties | properties
return self.__class__(*new_children, **new_properties)
diff --git a/pyhtml/__util.py b/pyhtml/__util.py
index 73fce0a..0a346f1 100644
--- a/pyhtml/__util.py
+++ b/pyhtml/__util.py
@@ -3,7 +3,10 @@
Random helpful functions used elsewhere
"""
-from typing import Any
+from typing import Any, TypeVar
+
+
+T = TypeVar('T')
def increase_indent(text: list[str], amount: int) -> list[str]:
@@ -111,3 +114,18 @@ def render_children(children: list[Any], sep: str = ' ') -> list[str]:
for ele in children:
rendered.extend(render_inline_element(ele))
return increase_indent(rendered, 2)
+
+
+def flatten_list(the_list: list[T | list[T]]) -> list[T]:
+ """
+ Flatten a list by taking any list elements and inserting their items
+ individually. Note that other iterables (such as str and tuple) are not
+ flattened.
+ """
+ result: list[T] = []
+ for item in the_list:
+ if isinstance(item, list):
+ result.extend(item)
+ else:
+ result.append(item)
+ return result
diff --git a/tests/basic_rendering_test.py b/tests/basic_rendering_test.py
index 91bfd16..4c90a40 100644
--- a/tests/basic_rendering_test.py
+++ b/tests/basic_rendering_test.py
@@ -122,3 +122,22 @@ def test_format_through_repr():
doc = html()
assert repr(doc) == ""
+
+
+def test_flatten_element_lists():
+ """
+ If a list of elements is given as a child element, each element should be
+ considered as a child.
+ """
+ doc = html([p("Hello"), p("world")])
+
+ assert repr(doc) == "\n".join([
+ "",
+ " ",
+ " Hello",
+ "
",
+ " ",
+ " world",
+ "
",
+ "",
+ ])