sort JSONView keys alphabetically

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Workflow detail: add on-canvas zoom controls for click/touch navigation and improve controls styling for dark mode. [PR #524](https://github.com/riverqueue/riverui/pull/524).
 - Workflow detail: improve default workflow diagram framing for legibility while still allowing manual zoom-out to view the full graph. [PR #524](https://github.com/riverqueue/riverui/pull/524).
 - Workflow detail: truncate long workflow names in the header to prevent overflow and add a copy button for the full name. [PR #524](https://github.com/riverqueue/riverui/pull/524).
+- JSON viewer: sort keys alphabetically in rendered and copied output for object payloads. [PR #525](https://github.com/riverqueue/riverui/pull/525).
 
 ## [v0.15.0] - 2026-02-26
 

src/components/JSONView.test.tsx

@@ -58,6 +58,44 @@ describe("JSONView Component", () => {
     expect(screen.getByText(/true/)).toBeInTheDocument();
   });
 
+  it("renders object keys alphabetically at root and nested levels", () => {
+    const unsortedData = Object.fromEntries([
+      ["zebra", 3],
+      [
+        "alpha",
+        Object.fromEntries([
+          ["zulu", true],
+          ["bravo", true],
+        ]),
+      ],
+      ["middle", 2],
+    ]);
+
+    render(<JSONView data={unsortedData} defaultExpandDepth={2} />);
+
+    const alphaKey = screen.getByText(/"alpha"/);
+    const middleKey = screen.getByText(/"middle"/);
+    const zebraKey = screen.getByText(/"zebra"/);
+
+    const alphaBeforeMiddle =
+      alphaKey.compareDocumentPosition(middleKey) &
+      Node.DOCUMENT_POSITION_FOLLOWING;
+    const middleBeforeZebra =
+      middleKey.compareDocumentPosition(zebraKey) &
+      Node.DOCUMENT_POSITION_FOLLOWING;
+
+    expect(alphaBeforeMiddle).toBeTruthy();
+    expect(middleBeforeZebra).toBeTruthy();
+
+    const bravoKey = screen.getByText(/"bravo"/);
+    const zuluKey = screen.getByText(/"zulu"/);
+    const bravoBeforeZulu =
+      bravoKey.compareDocumentPosition(zuluKey) &
+      Node.DOCUMENT_POSITION_FOLLOWING;
+
+    expect(bravoBeforeZulu).toBeTruthy();
+  });
+
   it("renders nested JSON data with collapsed nodes but visible keys by default", () => {
     render(<JSONView data={nestedData} defaultExpandDepth={1} />);
 
@@ -188,6 +226,74 @@ describe("JSONView Component", () => {
     });
   });
 
+  it("copies alphabetically sorted JSON to clipboard", async () => {
+    const unsortedData = Object.fromEntries([
+      ["zebra", 3],
+      [
+        "alpha",
+        Object.fromEntries([
+          ["zulu", true],
+          ["bravo", true],
+        ]),
+      ],
+      ["middle", 2],
+    ]);
+
+    render(<JSONView copyTitle="Test Data" data={unsortedData} />);
+
+    const copyButton = screen.getByTestId("text-copy-button");
+
+    await act(async () => {
+      fireEvent.click(copyButton);
+    });
+
+    expect(navigator.clipboard.writeText).toHaveBeenCalled();
+    const clipboardCall = (
+      navigator.clipboard.writeText as unknown as {
+        mock: { calls: string[][] };
+      }
+    ).mock.calls[0][0];
+
+    const parsed = JSON.parse(clipboardCall) as Record<string, unknown>;
+    expect(Object.keys(parsed)).toEqual(["alpha", "middle", "zebra"]);
+    expect(Object.keys(parsed.alpha as Record<string, unknown>)).toEqual([
+      "bravo",
+      "zulu",
+    ]);
+  });
+
+  it("preserves __proto__ as data when rendering and copying", async () => {
+    const dataWithProtoKey = JSON.parse(
+      '{"zebra":3,"__proto__":{"safe":"value"},"alpha":1}',
+    ) as Record<string, unknown>;
+
+    render(<JSONView copyTitle="Test Data" data={dataWithProtoKey} />);
+
+    expect(screen.getByText(/"__proto__"/)).toBeInTheDocument();
+
+    const copyButton = screen.getByTestId("text-copy-button");
+
+    await act(async () => {
+      fireEvent.click(copyButton);
+    });
+
+    expect(navigator.clipboard.writeText).toHaveBeenCalled();
+    const clipboardCall = (
+      navigator.clipboard.writeText as unknown as {
+        mock: { calls: string[][] };
+      }
+    ).mock.calls[0][0];
+
+    expect(clipboardCall).toContain('"__proto__"');
+
+    const parsed = JSON.parse(clipboardCall) as Record<string, unknown>;
+    expect(Object.prototype.hasOwnProperty.call(parsed, "__proto__")).toBe(
+      true,
+    );
+    expect(parsed["__proto__"]).toEqual({ safe: "value" });
+    expect(Object.getPrototypeOf(parsed)).toBe(Object.prototype);
+  });
+
   it("renders null and undefined values", () => {
     const data = {
       nullValue: null,

src/components/JSONView.tsx

@@ -44,10 +44,12 @@ export default function JSONView({
   data,
   defaultExpandDepth = 1,
 }: JSONViewProps) {
+  const sortedData = React.useMemo(() => sortObjectKeys(data), [data]);
+
   const jsonContent = (
     <>
       <JSONNodeRenderer
-        data={data}
+        data={sortedData}
         defaultExpandDepth={defaultExpandDepth}
         depth={0}
         isLastItemInParent={true}
@@ -63,11 +65,20 @@ export default function JSONView({
       codeClassName="pl-6"
       content={jsonContent}
       copyTitle={copyTitle}
-      rawText={JSON.stringify(data, null, 2)}
+      rawText={JSON.stringify(sortedData, null, 2)}
     />
   );
 }
 
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  if (value === null || typeof value !== "object") {
+    return false;
+  }
+
+  const prototype = Object.getPrototypeOf(value);
+  return prototype === null || prototype === Object.prototype;
+}
+
 function JSONNodeRenderer({
   data,
   defaultExpandDepth,
@@ -570,3 +581,55 @@ function renderValue(
     </Disclosure>
   );
 }
+
+function sortObjectKeys(value: unknown): unknown {
+  return sortObjectKeysInternal(value, new WeakMap<object, unknown>());
+}
+
+function sortObjectKeysInternal(
+  value: unknown,
+  sortedValues: WeakMap<object, unknown>,
+): unknown {
+  if (Array.isArray(value)) {
+    const cachedArray = sortedValues.get(value);
+    if (cachedArray) {
+      return cachedArray;
+    }
+
+    const sortedArray: unknown[] = [];
+    sortedValues.set(value, sortedArray);
+    for (const item of value) {
+      sortedArray.push(sortObjectKeysInternal(item, sortedValues));
+    }
+    return sortedArray;
+  }
+
+  if (!isPlainObject(value)) {
+    return value;
+  }
+
+  const cachedObject = sortedValues.get(value);
+  if (cachedObject) {
+    return cachedObject;
+  }
+
+  const sortedObject = Object.create(Object.getPrototypeOf(value)) as Record<
+    string,
+    unknown
+  >;
+  sortedValues.set(value, sortedObject);
+
+  const sortedEntries = Object.entries(value).sort(([leftKey], [rightKey]) =>
+    leftKey.localeCompare(rightKey),
+  );
+  for (const [key, item] of sortedEntries) {
+    Object.defineProperty(sortedObject, key, {
+      configurable: true,
+      enumerable: true,
+      value: sortObjectKeysInternal(item, sortedValues),
+      writable: true,
+    });
+  }
+
+  return sortedObject;
+}