{"id":12513,"library":"vue-json-compare","title":"Vue JSON Compare Component","description":"vue-json-compare is a Vue 2.x component designed for visually comparing two JSON objects or arrays. It accepts `oldData` and `newData` props, highlighting structural and value differences in a side-by-side, hierarchical display. The current stable version, 3.0.0, was last published over 5 years ago and is exclusively compatible with Vue 2 applications. Given that Vue 2 officially reached its end-of-life on December 31, 2023, this package is effectively deprecated and unsupported for new projects. Its primary differentiator was providing an immediate UI solution for JSON diffing within Vue 2 ecosystems, contrasting with lower-level JavaScript diffing libraries by offering a complete visual component. The project appears to be abandoned, with no active development or known support for Vue 3.","status":"abandoned","version":"3.0.0","language":"javascript","source_language":"en","source_url":null,"tags":["javascript","vue","json","compare"],"install":[{"cmd":"npm install vue-json-compare","lang":"bash","label":"npm"},{"cmd":"yarn add vue-json-compare","lang":"bash","label":"yarn"},{"cmd":"pnpm add vue-json-compare","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"Peer dependency, as it is a Vue 2.x component.","package":"vue","optional":false}],"imports":[{"note":"The component is exported as a default export, not a named export. It must be registered globally or locally within a Vue component's `components` option.","wrong":"import { vueJsonCompare } from 'vue-json-compare';","symbol":"vueJsonCompare","correct":"import vueJsonCompare from 'vue-json-compare';"},{"note":"For global registration in a Vue 2 application, `Vue.component` is used. CommonJS `require` syntax is typically not used directly for client-side Vue components.","wrong":"const vueJsonCompare = require('vue-json-compare');","symbol":"vueJsonCompare","correct":"Vue.component('vue-json-compare', vueJsonCompare);"},{"note":"For TypeScript users, type definitions are available via `@types/vue-json-compare`. The component is a default export, so type import should reflect that. The type package is also quite old.","wrong":"import { VueJsonCompare } from 'vue-json-compare';","symbol":"VueJsonCompare","correct":"import type VueJsonCompare from 'vue-json-compare';"}],"quickstart":{"code":"<template>\n  <div>\n    <vue-json-compare :oldData=\"oldData\" :newData=\"newData\"></vue-json-compare>\n  </div>\n</template>\n\n<script>\nimport vueJsonCompare from 'vue-json-compare';\n\nexport default {\n  components: {\n    vueJsonCompare\n  },\n  data () {\n    return {\n      oldData: {\n        id: 1,\n        name: 'Alice',\n        settings: { theme: 'dark', notifications: true },\n        tags: ['user', 'admin']\n      },\n      newData: {\n        id: 1,\n        name: 'Alicia',\n        age: 30,\n        settings: { theme: 'light', notifications: true },\n        tags: ['user', 'premium']\n      }\n    };\n  }\n};\n</script>","lang":"javascript","description":"This example demonstrates basic usage by importing and registering the `vue-json-compare` component, then passing two JSON objects, `oldData` and `newData`, as props to display their differences."},"warnings":[{"fix":"For Vue 3 projects, consider alternative JSON diffing libraries or components built specifically for Vue 3, such as `json-diff-kit-vue`.","message":"This package is explicitly built for Vue 2.x and is not compatible with Vue 3. Attempting to use it in a Vue 3 project will result in runtime errors due to breaking API changes between Vue major versions.","severity":"breaking","affected_versions":">=3.0.0"},{"fix":"It is strongly recommended to use a more actively maintained library, especially for production environments, or consider migrating to a Vue 3 compatible solution.","message":"The project appears to be abandoned. The last npm publish was over 5 years ago, and the last commit on GitHub was 6 years ago. There is no active development, maintenance, or support for this component. Vue 2 itself reached End of Life on December 31, 2023.","severity":"deprecated","affected_versions":">=3.0.0"},{"fix":"If interactive behavior or event handling is required, custom wrappers or modifications to the component's source might be necessary, or an alternative library should be chosen.","message":"The component does not expose any events, meaning there's no programmatic way to interact with user actions within the comparison UI or to get callbacks on changes, as stated in its README.","severity":"gotcha","affected_versions":">=3.0.0"},{"fix":"For extremely large datasets, consider pre-processing and diffing data on the server-side, or using a virtualized list/tree component if available for similar libraries.","message":"Performance might degrade significantly when comparing very large or deeply nested JSON objects due to client-side DOM rendering and diffing calculations, potentially leading to UI freezes.","severity":"gotcha","affected_versions":">=3.0.0"}],"env_vars":null,"last_verified":"2026-04-19T00:00:00.000Z","next_check":"2026-07-18T00:00:00.000Z","problems":[{"fix":"Ensure `import vueJsonCompare from 'vue-json-compare';` is used and `vueJsonCompare` is included in the `components` option of your Vue component.","cause":"The Vue component was not correctly imported or registered in the parent component or globally.","error":"Failed to mount component: template or render function not defined."},{"fix":"Always ensure `oldData` and `newData` props are valid JavaScript objects or arrays, even if empty, e.g., `:oldData=\"oldData || {}\"` or `:newData=\"newData || []\"`.","cause":"The `oldData` or `newData` props were passed as `undefined` or `null`, or contained unexpected non-object/array values where the component expected them.","error":"Cannot read properties of undefined (reading 'someProperty') in vue-json-compare component"}],"ecosystem":"npm"}