Vue JSON Compare Component

Common errors

• Failed to mount component: template or render function not defined.

  cause The Vue component was not correctly imported or registered in the parent component or globally.
  fix Ensure `import vueJsonCompare from 'vue-json-compare';` is used and `vueJsonCompare` is included in the `components` option of your Vue component.

• Cannot read properties of undefined (reading 'someProperty') in vue-json-compare component

  cause The `oldData` or `newData` props were passed as `undefined` or `null`, or contained unexpected non-object/array values where the component expected them.
  fix Always ensure `oldData` and `newData` props are valid JavaScript objects or arrays, even if empty, e.g., `:oldData="oldData || {}"` or `:newData="newData || []"`.

Warnings

• breaking 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.
  Fix: For Vue 3 projects, consider alternative JSON diffing libraries or components built specifically for Vue 3, such as `json-diff-kit-vue`.
• deprecated 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.
  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.
• gotcha 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.
  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.
• gotcha 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.
  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.

Install

• npm install vue-json-compare npm
• yarn add vue-json-compare yarn
• pnpm add vue-json-compare pnpm

Imports

• vueJsonCompare
  wrong:

  import { vueJsonCompare } from 'vue-json-compare';

  correct:

  import vueJsonCompare from 'vue-json-compare';

  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.
• vueJsonCompare
  wrong:

  const vueJsonCompare = require('vue-json-compare');

  correct:

  Vue.component('vue-json-compare', vueJsonCompare);

  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.
• VueJsonCompare
  wrong:

  import { VueJsonCompare } from 'vue-json-compare';

  correct:

  import type VueJsonCompare from 'vue-json-compare';

  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.

Quickstart

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.

<template>
  <div>
    <vue-json-compare :oldData="oldData" :newData="newData"></vue-json-compare>
  </div>
</template>

<script>
import vueJsonCompare from 'vue-json-compare';

export default {
  components: {
    vueJsonCompare
  },
  data () {
    return {
      oldData: {
        id: 1,
        name: 'Alice',
        settings: { theme: 'dark', notifications: true },
        tags: ['user', 'admin']
      },
      newData: {
        id: 1,
        name: 'Alicia',
        age: 30,
        settings: { theme: 'light', notifications: true },
        tags: ['user', 'premium']
      }
    };
  }
};
</script>