Document and test 'type' usage in Widget attrs

Refs #16630.

2 files changed, 12 insertions, 8 deletions

diff --git a/django/forms/fields.py b/django/forms/fields.py
index 7f0d26d1aa..124e4f669a 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -199,7 +199,7 @@ class CharField(Field):
 
     def widget_attrs(self, widget):
         attrs = super(CharField, self).widget_attrs(widget)
-        if self.max_length is not None and isinstance(widget, (TextInput, PasswordInput)):
+        if self.max_length is not None and isinstance(widget, TextInput):
             # The HTML attribute is maxlength, not max_length.
             attrs.update({'maxlength': str(self.max_length)})
         return attrs
diff --git a/django/forms/widgets.py b/django/forms/widgets.py
index 7651efccd0..763da0cff2 100644
--- a/django/forms/widgets.py
+++ b/django/forms/widgets.py
@@ -260,10 +260,17 @@ class Input(Widget):
             final_attrs['value'] = force_text(self._format_value(value))
         return format_html('<input{0} />', flatatt(final_attrs))
 
+
 class TextInput(Input):
     input_type = 'text'
 
-class PasswordInput(Input):
+    def __init__(self, attrs=None):
+        if attrs is not None:
+            self.input_type = attrs.pop('type', self.input_type)
+        super(TextInput, self).__init__(attrs)
+
+
+class PasswordInput(TextInput):
     input_type = 'password'
 
     def __init__(self, attrs=None, render_value=False):
@@ -400,9 +407,8 @@ class Textarea(Widget):
                            flatatt(final_attrs),
                            force_text(value))
 
-class DateInput(Input):
-    input_type = 'text'
 
+class DateInput(TextInput):
     def __init__(self, attrs=None, format=None):
         super(DateInput, self).__init__(attrs)
         if format:
@@ -431,9 +437,8 @@ class DateInput(Input):
             pass
         return super(DateInput, self)._has_changed(self._format_value(initial), data)
 
-class DateTimeInput(Input):
-    input_type = 'text'
 
+class DateTimeInput(TextInput):
     def __init__(self, attrs=None, format=None):
         super(DateTimeInput, self).__init__(attrs)
         if format:
@@ -462,9 +467,8 @@ class DateTimeInput(Input):
             pass
         return super(DateTimeInput, self)._has_changed(self._format_value(initial), data)
 
-class TimeInput(Input):
-    input_type = 'text'
 
+class TimeInput(TextInput):
     def __init__(self, attrs=None, format=None):
         super(TimeInput, self).__init__(attrs)
         if format: