Add Script get/set nonce

When we toInterface(node), if node is a DocumentFragment with a host, then
return the host.

Both changes for reddit.

Author: karlseguin

src/browser/dom/node.zig

@@ -86,7 +86,19 @@ pub const Node = struct {
             },
             .document_type => .{ .DocumentType = @as(*parser.DocumentType, @ptrCast(node)) },
             .attribute => .{ .Attr = @as(*parser.Attribute, @ptrCast(node)) },
-            .document_fragment => .{ .DocumentFragment = @as(*parser.DocumentFragment, @ptrCast(node)) },
+            .document_fragment => blk: {
+                const df: *parser.DocumentFragment = @ptrCast(node);
+                if (parser.documentFragmentGetHost(df)) |host| {
+                    // If the DocumentFragment has a "host", then it's 100%
+                    // acting as the root of the ShadowDOM. And I *think*, in
+                    // those cases, if we end up with that DocumentFragment, we
+                    // should actually return the host. For example, if there's
+                    // A MutationObservation on the DocumentFragment, it's the
+                    // Host which we should treat as the target. I think.
+                    break :blk toInterface(host);
+                }
+                break :blk .{ .DocumentFragment = df };
+            },
             else => @panic("node type not handled"), // TODO
         };
     }

src/browser/html/elements.zig

@@ -977,6 +977,21 @@ pub const HTMLScriptElement = struct {
         return try parser.elementRemoveAttribute(parser.scriptToElt(self), "nomodule");
     }
 
+    pub fn get_nonce(self: *parser.Script) !?[]const u8 {
+        return try parser.elementGetAttribute(
+            parser.scriptToElt(self),
+            "nonce",
+        ) orelse "";
+    }
+
+    pub fn set_nonce(self: *parser.Script, v: bool) !void {
+        if (v) {
+            return try parser.elementSetAttribute(parser.scriptToElt(self), "nonce", "");
+        }
+
+        return try parser.elementRemoveAttribute(parser.scriptToElt(self), "nonce");
+    }
+
     pub fn get_onload(self: *parser.Script, page: *Page) !?Env.Function {
         const state = page.getNodeState(@ptrCast(@alignCast(self))) orelse return null;
         return state.onload;

src/tests/html/script/script.html

@@ -11,4 +11,8 @@
 
   script.defer = true;
   testing.expectEqual(true, script.defer);
+
+  testing.expectEqual('', script.nonce);
+  script.nonce = 'hello';
+  testing.expectEqual('hello', script.nonce);
 </script>