Vue diff viewer plugin for Vue

vue-diff

Vue diff viewer plugin for Vue@3

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).

Features

• 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

Install plugin

npm install vue-diff

And install plugin in vue application

import VueDiff from 'vue-diff'

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

app.use(VueDiff)

Options

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

name	type	detault	description
componentName	string	Diff	Global diff component name

Usage diff viewer

Insert the diff component with props.

Settings with default props

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

Settings with full props

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

Props

name	type	detault	values	description
mode	string	split	split, unified
theme	string	dark	dark, light	See Custom theme
language	string	plaintext		See Extend languages
prev	string	''		Prev code
current	string	''		Current Code
inputDelay	number	0		Setting up rendering debounce for changes for performance benefit (mode, prev, curr)
virtualScroll	boolean\|object	false		Default value when setting true : { height: 500, lineMinHeight: 24, delay: 100 } See virtual scroll

Custom theme

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"
    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>

Extend languages

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

Default supported languages and values

• 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

Virtual scroll

Comparing text from many lines can slow down performance.

With virtualScroll props, virtualScroll applies. (Self-made for this plug-in.)

Object property value

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.