fix(runtime): support native user interactions

req: examples/005

req: form/002

req: convention/004

req: dx/008

slhx-js/tests/runtime.rs

@@ -22,6 +22,9 @@ fn runtime_clicking_submitter_schedules_form_submit() {
     // req: convention/004
     let source = slhx_js::RUNTIME_JS;
 
+    assert!(source.contains("function formOwner(el)"));
+    assert!(source.contains("function formHandleId(form)"));
+    assert!(source.contains("document.getElementById(el.getAttribute(\"form\"))"));
     assert!(source.contains("const direct = closestInRoot(event.target, root, `[${HID}]`)"));
     assert!(source.contains("button[type=submit], input[type=submit], button:not([type])"));
     assert!(source.contains("form.reportValidity && !form.reportValidity()"));