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Register 'checked' as an HTML boolean attribute.

This way, 'tag :foo, :type => "checkbox", :checked => false' would output
the expected

  <input type="checkbox" />

instead of the old

  <input type="checkbox" checked="false" />

The latter would result in a checkbox that's initially checked.

Signed-off-by: Jeremy Kemper <>
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FooBarWidget authored and jeremy committed Nov 18, 2008
1 parent 19e9a1f commit 337c361e26fe5647036f94556fe792535a921f93
@@ -9,7 +9,7 @@ module Helpers #:nodoc:
module TagHelper
include ERB::Util
- BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple).to_set
+ BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple checked).to_set
# Returns an empty HTML tag of type +name+ which by default is XHTML
@@ -238,6 +238,7 @@ def test_label_tag_id_sanitized
def test_boolean_options
assert_dom_equal %(<input checked="checked" disabled="disabled" id="admin" name="admin" readonly="readonly" type="checkbox" value="1" />), check_box_tag("admin", 1, true, 'disabled' => true, :readonly => "yes")
assert_dom_equal %(<input checked="checked" id="admin" name="admin" type="checkbox" value="1" />), check_box_tag("admin", 1, true, :disabled => false, :readonly => nil)
+ assert_dom_equal %(<input type="checkbox" />), tag(:input, :type => "checkbox", :checked => false)
assert_dom_equal %(<select id="people" multiple="multiple" name="people[]"><option>david</option></select>), select_tag("people", "<option>david</option>", :multiple => true)
assert_dom_equal %(<select id="people_" multiple="multiple" name="people[]"><option>david</option></select>), select_tag("people[]", "<option>david</option>", :multiple => true)
assert_dom_equal %(<select id="people" name="people"><option>david</option></select>), select_tag("people", "<option>david</option>", :multiple => nil)

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