2 files changed, 19 insertions, 3 deletions
diff --git a/components/script/dom/webidls/XRInputSourceArray.webidl b/components/script/dom/webidls/XRInputSourceArray.webidl
index 939371bf417..f8a0eb4308d 100644
--- a/components/script/dom/webidls/XRInputSourceArray.webidl
+++ b/components/script/dom/webidls/XRInputSourceArray.webidl
@@ -6,7 +6,7 @@
 
 [SecureContext, Exposed=Window, Pref="dom.webxr.enabled"]
 interface XRInputSourceArray {
-  // iterable<XRInputSource>;
-  // readonly attribute unsigned long length;
-  // getter XRInputSource(unsigned long index);
+  iterable<XRInputSource>;
+  readonly attribute unsigned long length;
+  getter XRInputSource(unsigned long index);
 };
diff --git a/components/script/dom/xrinputsourcearray.rs b/components/script/dom/xrinputsourcearray.rs
index bf63e38e073..b0565940373 100644
--- a/components/script/dom/xrinputsourcearray.rs
+++ b/components/script/dom/xrinputsourcearray.rs
@@ -4,6 +4,7 @@
 
 use crate::dom::bindings::cell::DomRefCell;
 use crate::dom::bindings::codegen::Bindings::XRInputSourceArrayBinding;
+use crate::dom::bindings::codegen::Bindings::XRInputSourceArrayBinding::XRInputSourceArrayMethods;
 use crate::dom::bindings::reflector::{reflect_dom_object, DomObject, Reflector};
 use crate::dom::bindings::root::{Dom, DomRoot};
 use crate::dom::globalscope::GlobalScope;
@@ -46,3 +47,18 @@ impl XRInputSourceArray {
         });
     }
 }
+
+impl XRInputSourceArrayMethods for XRInputSourceArray {
+    /// https://immersive-web.github.io/webxr/#dom-xrinputsourcearray-length
+    fn Length(&self) -> u32 {
+        self.input_sources.borrow().len() as u32
+    }
+
+    /// https://immersive-web.github.io/webxr/#xrinputsourcearray
+    fn IndexedGetter(&self, n: u32) -> Option<DomRoot<XRInputSource>> {
+        self.input_sources
+            .borrow()
+            .get(n as usize)
+            .map(|x| DomRoot::from_ref(&**x))
+    }
+}