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vercel-labs/json-render

The Generative UI framework

TypeScript★ 17,511+291 that day#9 on trending

Analyzed September 21, 2026 at 3ad3818 (main) with jscpd 5.4.0 in 0.6s.

E39.9/100

Project health159,311 lines of code (L)

Duplication14

24.3% in typescript, tsx, svelte, bash, python, javascript, perl, vue

Dead code83

Complexity54

44.6%

The score is jscpd's own --health model: markup, data and text left out, tests kept. The numbers below are the trending scan's.

22.98%duplicated code · 17,311 of 75,325 lines

554clones in code

617code files of 1,628 scanned

23.6%duplicated over all files · 1,543 clones

Most complex files

Dead code 2% unused · 142 findings

packages/react-email/src/__fixtures__/examples.tsunused-file
apps/web/components/generation-modes-diagram.tsxunused-file
skills/remotion-best-practices/rules/assets/charts-bar-chart.tsxunused-file
apps/web/lib/examples.tsunused-file
apps/web/components/package-install.tsxunused-file
apps/web/mdx-components.tsxunused-file
skills/remotion-best-practices/rules/assets/text-animations-word-highlight.tsxunused-file
skills/remotion-best-practices/rules/assets/text-animations-typewriter.tsxunused-file
apps/web/components/ui/card.tsxunused-file
apps/web/components/code-tabs.tsxunused-file

The code number leaves out tests, fixtures, docs, examples, data files, styles, translations and vendored code, and 1 generated file: packages/core/src/directives.ts.

Largest clones in the code

262 lines in 3 placestsx1,342 tokens
packages/react-email/src/contexts/validation.tsx:1–262 packages/react-native/src/contexts/validation.tsx:1–308 packages/react-pdf/src/contexts/validation.tsx:1–262
```
1import React, {
2  createContext,
3  useContext,
4  useState,
5  useCallback,
6  useMemo,
7  type ReactNode,
8} from "react";
9import {
10  runValidation,
```
First 10 of 262 lines.

426 lines in 2 placestypescript2,158 tokens

packages/shadcn-svelte/src/catalog.ts:81–506packages/shadcn/src/catalog.ts:84–509

81    z.object({
82      label: z.string(),
83      value: z.string(),
84    }),
85  ),
86  defaultValue: z.string().nullable(),
87  value: z.string().nullable(),
88}),
89slots: ["default"],
90events: ["change"],

First 10 of 426 lines.

135 lines in 3 placestsx557 tokens

apps/web/components/code-block.tsx:5–139apps/web/components/code.tsx:3–137apps/web/components/package-install.tsx:2–136

5import { CopyButton } from "./copy-button";
6
7const vercelDarkTheme = {
8  name: "vercel-dark",
9  type: "dark" as const,
10  colors: {
11    "editor.background": "transparent",
12    "editor.foreground": "#EDEDED",
13  },
14  settings: [

First 10 of 135 lines.

7 more

232 lines in 2 placestsx1,011 tokens
apps/web/components/ui/carousel.tsx:10–241 packages/shadcn/src/ui/carousel.tsx:10–241
221 lines in 2 placestypescript1,005 tokens
packages/react/src/hooks.ts:3–223 packages/vue/src/hooks.ts:10–230
219 lines in 2 placestypescript1,003 tokens
packages/react/src/hooks.ts:3–221 packages/solid/src/hooks.ts:1–219
251 lines in 2 placestsx897 tokens
apps/web/components/ui/dropdown-menu.tsx:7–257 packages/shadcn/src/ui/dropdown-menu.tsx:7–257
190 lines in 2 placestsx831 tokens
packages/react-native/src/contexts/actions.tsx:9–198 packages/react-pdf/src/contexts/actions.tsx:8–148
184 lines in 2 placestsx705 tokens
apps/web/components/ui/select.tsx:7–190 packages/shadcn/src/ui/select.tsx:5–188
33 lines in 5 placestypescript171 tokens
packages/image/src/schema.ts:1–33 packages/ink/src/schema.ts:1–43 packages/react-native/src/schema.ts:1–45 packages/solid/src/schema.ts:1–45 packages/svelte/src/schema.ts:1–45

Largest clones over all files, tests and data included

1385 lines in 2 placestypescriptdocs and examples8,549 tokens

examples/stripe-app/drawer-app/src/lib/render/catalog/actions.ts:202–1586examples/stripe-app/fullpage-app/src/lib/render/catalog/actions.ts:182–1566

202  }
203},
204
205createPaymentIntent: async (params, setState) => {
206  try {
207    await stripe.paymentIntents.create({
208      amount: (params?.amount as number) ?? 0,
209      currency: (params?.currency as string) ?? "usd",
210      customer: (params?.customerId as string) ?? undefined,
211      description: (params?.description as string) ?? undefined,

First 10 of 1385 lines.

1358 lines in 2 placestypescriptdocs and examples7,640 tokens

examples/stripe-app/drawer-app/src/lib/render/catalog.ts:1–1358examples/stripe-app/fullpage-app/src/lib/render/catalog.ts:1–1358

1import { defineCatalog } from "@json-render/core";
2import { schema } from "@json-render/react/schema";
3import { z } from "zod";
4
5/**
6 * Stripe UIXT Catalog
7 *
8 * Comprehensive catalog mapping to Stripe UI Extension SDK components.
9 */
10export const stripeCatalog = defineCatalog(schema, {

First 10 of 1358 lines.

1400 lines in 2 placestsxdocs and examples7,242 tokens

examples/stripe-app/drawer-app/src/lib/render/catalog/components.tsx:6–1405examples/stripe-app/fullpage-app/src/lib/render/catalog/components.tsx:6–1405

6import type { FunctionComponent } from "react";
7import type { ComponentRenderProps } from "@json-render/react";
8import {
9  Box,
10  Badge as UIBadge,
11  Banner as UIBanner,
12  Button as UIButton,
13  Checkbox as UICheckbox,
14  DateField as UIDateField,
15  Divider as UIDivider,

First 10 of 1400 lines.

1046 lines in 2 placestypescriptdocs and examples3,940 tokens
examples/react-email/lib/examples.ts:10–1055 packages/react-email/src/__fixtures__/examples.ts:12–1057
124 lines in 3 placescssdocs and examples1,463 tokens
examples/image/app/globals.css:1–124 examples/react-email/app/globals.css:1–124 examples/react-pdf/app/globals.css:1–124

By format, code only

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	285	37,454	283	7,689	20.53%
tsx	155	31,768	266	9,551	30.06%
html	70	1,277	3	49	3.84%
javascript	6	228	2	22	9.65%
svelte	87	3,223	0	0	0%
bash	9	644	0	0	0%
python	3	508	0	0	0%
perl	1	174	0	0	0%
css	1	49	0	0	0%

By format, all files

Format	Files	Lines	Clones	Duplicated lines	Duplication
typescript	604	86,992	694	19,014	21.86%
tsx	422	71,657	618	20,543	28.67%
markdown	156	19,725	93	3,230	16.38%
json	109	4,523	93	1,913	42.29%
css	20	2,482	26	981	39.52%
html	112	2,225	14	232	10.43%
javascript	11	407	3	64	15.72%
yaml	18	269	2	20	7.43%
svelte	138	4,647	0	0	0%
bash	18	719	0	0	0%

Trending appearances

Day	Rank	Stars	Files	Lines	Clones	All files	Code	Health	Commit
Sep 21, 2026	#9	17,511 (+291)	1,628	194,865	1,543	23.6%	22.98%	E 39.9	`3ad3818`

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