Vue diff viewer plugin for Vue@3
demo

• Table of Contents
• Introduction
• Features
• Install plugin
  • Options
• Usage diff viewer
  • Settings with default props
  • Settings with full props
  • Props
• Custom theme
• Extend languages
  • Default supported languages and values
• Virtual scroll
  • Object props

You can see the difference between the two codes with the vue-diff plugin.
This plugin dependent on diff-match-patch and highlight.js, shows similar results to other diff viewers (e.g., Github Desktop).
Here is the demo

• Support split / unified mode
• Support multiple languages and can be extended
• Support two themes (dark / light) and can be customized
• Virtual scroll for large text comparison
• Folding view (Partial folding is not supported)
• Support typescript

npm install vue-diff

And install plugin in vue application

import VueDiff from 'vue-diff';

import 'vue-diff/dist/index.css';

app.use(VueDiff);

app.use(VueDiff, {
  componentName: 'VueDiff',
});

Insert the diff component with props.

<template>
  <!-- If the changed componentName
  <VueDiff>
  -->
  <Diff
    :mode="mode"
    :theme="theme"
    :language="language"
    :prev="prev"
    :current="current"
  />
</template>

<template>
  <Diff
    :mode="mode"
    :theme="theme"
    :language="language"
    :prev="prev"
    :current="current"
    :folding="folding"
    :input-delay="0"
    :virtual-scroll="{ height: 500, lineMinHeight: 24, delay: 100 }"
  />
</template>

vue-diff uses the following highlight.js themes and can be customized.

• dark: highlight.js/scss/monokai.scss
• light: highlight.js/scss/vs.scss

npm install highlight.js

<template>
  <Diff
    :mode="mode"
    <!-- Characters that begin with custom -->
    theme="custom"
    :language="language"
    :prev="prev"
    :current="current"
  />
</template>

<style lang="scss">
.vue-diff-theme-custom {
  @import 'highlight.js/scss/vs2015.scss'; // import theme

  background-color: #000; // Set background color
}
</style>

vue-diff supports the following languages and can be extended through highlight.js language registration.

• css
• xml: xml, html, xhtml, rss, atom, xjb, xsd, xsl, plist, svg
• markdown: markdown, md, mkdown, mkd
• javascript: javascript, js, jsx
• json
• plaintext: plaintext, txt, text
• typescript: typescript, ts

npm install highlight.js

import VueDiff from 'vue-diff';
import 'vue-diff/dist/index.css';

// extend yaml language
import yaml from 'highlight.js/lib/languages/yaml';

VueDiff.hljs.registerLanguage('yaml', yaml);

app.use(VueDiff);

Check supported languages of Highlight.js

Comparing text from many lines can slow down performance.
With virtualScroll props, virtualScroll applies. (Self-made for this plug-in.)

When using virtual scroll, the css of all code lines is changed to the absolute position, which requires detailed settings.

• height (number): Diff box height (Applies only to px values)
• lineMinHeight (number): minimum height of line

  Minimum height value of line is required for visible area calculation.
  The default is 24, but you can set it yourself if you need to adjust it according to the page's front-size, line-height, etc.

• delay (number): re-rendering delay when scrolling or resizing

  Performance problems occur when too often a re-rendering function is invoked based on scrolling or resizing
  This setting applies a delay using throttle.