Auto merge of #25499 - NeverHappened:implement-form-dirname, r=jdm

Implement dirname support for form element

Added support for dirname in input on form submit
Added Dir getter / setter for HTMLElement
NOT YET Added get directionality according to https://html.spec.whatwg.org/multipage/dom.html#the-directionality

- [X] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #25379 (GitHub issue number if applicable)

1 files changed, 10 insertions, 0 deletions

diff --git a/components/script/dom/element.rs b/components/script/dom/element.rs
index eecff289cdb..268b263fc41 100644
--- a/components/script/dom/element.rs
+++ b/components/script/dom/element.rs
@@ -540,6 +540,16 @@ impl Element {
         }
         true // whatwg/html#5239
     }
+
+    // https://html.spec.whatwg.org/multipage/#the-directionality
+    pub fn directionality(&self) -> String {
+        self.downcast::<HTMLElement>()
+            .and_then(|html_element| html_element.directionality())
+            .unwrap_or_else(|| {
+                let node = self.upcast::<Node>();
+                node.parent_directionality()
+            })
+    }
 }
 
 #[allow(unsafe_code)]