{"id":12456,"library":"vue-diff","title":"Vue Diff Viewer","description":"Vue-diff is a Vue 3 component designed for rendering code differences in a user-friendly interface. It offers both split (side-by-side) and unified (inline) viewing modes, similar to those found in popular version control interfaces like GitHub Desktop. The component leverages `diff-match-patch` for its core diffing algorithm and `highlight.js` for robust syntax highlighting across various programming languages. Key features include support for customizable light and dark themes, virtual scrolling to efficiently handle large text comparisons, and a folding view for improved readability. It ships with TypeScript types, ensuring a good developer experience in TypeScript projects. The current stable version is 1.2.4, released in June 2022. While functional, its release cadence appears to be slow, suggesting a maintenance-focused development status rather than active feature expansion.","status":"maintenance","version":"1.2.4","language":"javascript","source_language":"en","source_url":"https://github.com/hoiheart/vue-diff","tags":["javascript","Vue","VueJS","Vue diff","VueJS diff","typescript"],"install":[{"cmd":"npm install vue-diff","lang":"bash","label":"npm"},{"cmd":"yarn add vue-diff","lang":"bash","label":"yarn"},{"cmd":"pnpm add vue-diff","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"Core library for computing text differences.","package":"diff-match-patch","optional":false},{"reason":"Provides syntax highlighting for the code blocks being diffed.","package":"highlight.js","optional":false},{"reason":"Peer dependency as a Vue 3 component.","package":"vue","optional":false}],"imports":[{"note":"The library is designed for ESM; CommonJS `require` is not supported for importing the main component.","wrong":"const VueDiff = require('vue-diff');","symbol":"VueDiff","correct":"import VueDiff from 'vue-diff';"},{"note":"The CSS entry point is specifically within the 'dist' folder.","wrong":"import 'vue-diff/index.css';","symbol":"CSS Styles","correct":"import 'vue-diff/dist/index.css';"},{"note":"Vue 3 plugin installation uses `app.use()` on the application instance, not a global `Vue` constructor.","wrong":"new Vue().use(VueDiff);","symbol":"Vue Application Plugin","correct":"app.use(VueDiff);"}],"quickstart":{"code":"import { createApp } from 'vue';\nimport VueDiff from 'vue-diff';\nimport 'vue-diff/dist/index.css';\n\nconst app = createApp({\n template: `\n \n
Code Diff Example
\n \n \n `,\n setup() {\n const prevCode = `\n function hello(name: string) {\n console.log('Hello, ' + name + '!');\n const age = 30;\n return name + age;\n }\n `;\n const currentCode = `\n function greeting(name: string) {\n console.log('Hi, ' + name + '!');\n const city = 'New York';\n return `Welcome, ${name} from ${city}`;\n }\n `;\n return { prevCode, currentCode };\n }\n});\n\napp.use(VueDiff, { componentName: 'Diff' });\napp.mount('#app');","lang":"typescript","description":"This quickstart demonstrates how to install and register `vue-diff` as a Vue 3 plugin, then use the `` component to display a side-by-side comparison of two TypeScript code snippets with dark theme and virtual scrolling."},"warnings":[{"fix":"Ensure your project is a Vue 3 application. If not, consider migrating to Vue 3 or finding a Vue 2 compatible diff library.","message":"`vue-diff` is exclusively built for Vue 3. It will not function with Vue 2 applications, requiring a migration if coming from an older Vue version.","severity":"breaking","affected_versions":">=1.0.0"},{"fix":"Review the GitHub repository's issue tracker for active issues or known limitations before integrating into critical production paths. Be prepared to fork or contribute if specific new features or urgent bug fixes are needed.","message":"The library has not received a major update since June 2022, suggesting it is in maintenance mode. While functional, expect slower bug fixes, feature additions, or updates to newer dependencies.","severity":"gotcha","affected_versions":">=1.2.4"},{"fix":"Refer to the 'Custom theme' section in the documentation. Define your custom theme as a CSS class (e.g., `.my-custom-theme`) and pass its name (e.g., `'custommy-custom-theme'`) to the `theme` prop.","message":"When customizing themes, ensure that the CSS variables or custom theme classes are correctly defined and provided. The `theme` prop accepts `'dark'`, `'light'`, or `custom${string}`. Incorrectly named custom themes will default to the fallback theme.","severity":"gotcha","affected_versions":">=1.0.0"}],"env_vars":null,"last_verified":"2026-04-19T00:00:00.000Z","next_check":"2026-07-18T00:00:00.000Z","problems":[{"fix":"Ensure you have called `app.use(VueDiff);` (or `app.use(VueDiff, { componentName: 'YourComponentName' });`) in your main application file (e.g., `main.ts` or `main.js`) before mounting the app.","cause":"The `vue-diff` component has not been correctly registered with your Vue application instance.","error":"Error: Failed to resolve component: Diff"},{"fix":"Add `import 'vue-diff/dist/index.css';` to your main application entry file (e.g., `main.ts` or `main.js`) or within a global style sheet.","cause":"The CSS styles for `vue-diff` were not imported, leading to missing styling for the diff viewer.","error":"Cannot find module 'vue-diff/dist/index.css' or its corresponding type declarations."},{"fix":"Check the list of default supported languages in the `vue-diff` documentation. If your language is not listed, refer to the 'Extend languages' section to register additional `highlight.js` languages.","cause":"The language specified in the `language` prop is not supported by default, or `highlight.js` needs to be extended with the desired language.","error":"Syntax highlighting is not working for specific languages."}],"ecosystem":"npm"}