diff2html

Pretty diff to html javascript library (diff2html)
授权协议 MIT License
开发语言 HTML/CSS
所属分类 开发工具、 语法解析工具
软件类型 开源软件
地区 不详
投 递 者 俞子实
操作系统 跨平台
开源组织
适用人群 未知
 软件概览

diff2html

diff2html generates pretty HTML diffs from git diff or unified diff output.

NPM

Table of Contents

Features

  • Supports git and unified diffs

  • Line by line and Side by side diff

  • New and old line numbers

  • Inserted and removed lines

  • GitHub like visual style

  • Code syntax highlight

  • Line similarity matching

  • Easy code selection

Online Example

Go to diff2html

Distributions

Usage

Diff2Html can be used in various ways as listed in the distributions section. The two main ways are:

  • Diff2HtmlUI: using this wrapper makes it easy to inject the html in the DOM and adds some nicefeatures to the diff, like syntax highlight.
  • Diff2Html: using the parser and html generator directly from the library gives you completecontrol about what you can do with the json or html generated.

Below you can find more details and examples about each option.

Diff Text Input

diff2html accepts the text contents of aunified diff or the superset format gitdiff (https://git-scm.com/docs/git-diff) (not combined or word diff). To provide multiples files as input justconcatenate the diffs (just like the output of git diff).

Diff2HtmlUI Usage

Simple wrapper to ease simple tasks in the browser such as: code highlight and js effects

  • Invoke Diff2html
  • Inject output in DOM element
  • Enable collapsible file summary list
  • Enable syntax highlight of the code in the diffs

Diff2HtmlUI API

Create a Diff2HtmlUI instance

constructor(target: HTMLElement, diffInput?: string | DiffFile[]) // diff2html-ui, diff2html-ui-slim
constructor(target: HTMLElement, diffInput?: string | DiffFile[], config: Diff2HtmlUIConfig = {}, hljs?: HighlightJS) // diff2html-ui-base

Generate and inject in the document the Pretty HTML representation of the diff

draw(): void

Enable extra features

synchronisedScroll(): void
fileListToggle(startVisible: boolean): void
highlightCode(): void

Diff2HtmlUI Configuration

  • synchronisedScroll: scroll both panes in side-by-side mode: true or false, default is true
  • highlight: syntax highlight the code on the diff: true or false, default is true
  • fileListToggle: allow the file summary list to be toggled: true or false, default is true
  • fileListStartVisible: choose if the file summary list starts visible: true or false, default is false
  • fileContentToggle: allow each file contents to be toggled: true or false, default is true
  • All the options from Diff2Html are also valid configurations in Diff2HtmlUI

Diff2HtmlUI Browser

Mandatory HTML resource imports

<!-- CSS -->
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css" />

<!-- Javascripts -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html-ui.min.js"></script>

Init

const targetElement = document.getElementById('destination-elem-id');
const configuration = { drawFileList: true, matching: 'lines' };

const diff2htmlUi = new Diff2HtmlUI(targetElement, diffString, configuration);
// or
const diff2htmlUi = new Diff2HtmlUI(targetElement, diffJson, configuration);

Draw

diff2htmlUi.draw();

Syntax Highlight

NOTE: The highlight.js css should come before the diff2html css

<!-- Stylesheet -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css" />
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css" />

<!-- Javascripts -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html-ui.min.js"></script>

Pass the option highlight with value true or invoke diff2htmlUi.highlightCode() after diff2htmlUi.draw().

document.addEventListener('DOMContentLoaded', () => {
  const diffString = `diff --git a/sample.js b/sample.js
  index 0000001..0ddf2ba
  --- a/sample.js
  +++ b/sample.js
  @@ -1 +1 @@
  -console.log("Hello World!")
  +console.log("Hello from Diff2Html!")`;
  const targetElement = document.getElementById('myDiffElement');
  const configuration = { drawFileList: true, matching: 'lines', highlight: true };
  const diff2htmlUi = new Diff2HtmlUI(targetElement, diffString, configuration);
  diff2htmlUi.draw();
  diff2htmlUi.highlightCode();
});

Collapsable File Summary List

Add the dependencies.

<!-- Javascripts -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html-ui.min.js"></script>

Invoke the Diff2HtmlUI helper Pass the option fileListToggle with value true or invokediff2htmlUi.fileListToggle() after diff2htmlUi.draw().

document.addEventListener('DOMContentLoaded', () => {
  const targetElement = document.getElementById('myDiffElement');
  var diff2htmlUi = new Diff2HtmlUI(targetElement, lineDiffExample, { drawFileList: true, matching: 'lines' });
  diff2htmlUi.draw();
  diff2htmlUi.fileListToggle(false);
});

Diff2HtmlUI Examples

Example with plain HTML+CSS+JS

<!DOCTYPE html>
<html lang="en-us">
  <head>
    <meta charset="utf-8" />
    <!-- Make sure to load the highlight.js CSS file before the Diff2Html CSS file -->
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.7.1/styles/github.min.css" />
    <link
      rel="stylesheet"
      type="text/css"
      href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css"
    />
    <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html-ui.min.js"></script>
  </head>
  <script>
    const diffString = `diff --git a/sample.js b/sample.js
      index 0000001..0ddf2ba
      --- a/sample.js
      +++ b/sample.js
      @@ -1 +1 @@
      -console.log("Hello World!")
      +console.log("Hello from Diff2Html!")`;

    document.addEventListener('DOMContentLoaded', function () {
      var targetElement = document.getElementById('myDiffElement');
      var configuration = {
        drawFileList: true,
        fileListToggle: false,
        fileListStartVisible: false,
        fileContentToggle: false,
        matching: 'lines',
        outputFormat: 'side-by-side',
        synchronisedScroll: true,
        highlight: true,
        renderNothingWhenEmpty: false,
      };
      var diff2htmlUi = new Diff2HtmlUI(targetElement, diffString, configuration);
      diff2htmlUi.draw();
      diff2htmlUi.highlightCode();
    });
  </script>
  <body>
    <div id="myDiffElement"></div>
  </body>
</html>

Diff2Html Usage

Diff2Html API

JSON representation of the diff

function parse(diffInput: string, configuration: Diff2HtmlConfig = {}): DiffFile[];

Pretty HTML representation of the diff

function html(diffInput: string | DiffFile[], configuration: Diff2HtmlConfig = {}): string;

Diff2Html Configuration

The HTML output accepts a Javascript object with configuration. Possible options:

  • outputFormat: the format of the output data: 'line-by-line' or 'side-by-side', default is 'line-by-line'
  • drawFileList: show a file list before the diff: true or false, default is true
  • srcPrefix: add a prefix to all source (before changes) filepaths, default is ''. Should match the prefix used whengenerating the diff.
  • dstPrefix: add a prefix to all destination (after changes) filepaths, default is ''. Should match the prefix usedwhen generating the diff
  • diffMaxChanges: number of changed lines after which a file diff is deemed as too big and not displayed, default isundefined
  • diffMaxLineLength: number of characters in a diff line after which a file diff is deemed as too big and notdisplayed, default is undefined
  • diffTooBigMessage: function allowing to customize the message in case of file diff too big (if diffMaxChanges ordiffMaxLineLength is set). Will be given a file index as a number and should return a string.
  • matching: matching level: 'lines' for matching lines, 'words' for matching lines and words or 'none', defaultis none
  • matchWordsThreshold: similarity threshold for word matching, default is 0.25
  • maxLineLengthHighlight: only perform diff changes highlight if lines are smaller than this, default is 10000
  • diffStyle: show differences level in each line: 'word' or 'char', default is 'word'
  • renderNothingWhenEmpty: render nothing if the diff shows no change in its comparison: true or false, default isfalse
  • matchingMaxComparisons: perform at most this much comparisons for line matching a block of changes, default is2500
  • maxLineSizeInBlockForComparison: maximum number os characters of the bigger line in a block to apply comparison,default is 200
  • compiledTemplates: object (Hogan.js template values) with previouslycompiled templates to replace parts of the html, default is {}. For example:{ "tag-file-changed": Hogan.compile("<span class="d2h-tag d2h-changed d2h-changed-tag">MODIFIED</span>") }
  • rawTemplates: object (string values) with raw not compiled templates to replace parts of the html, default is {}.For example: { "tag-file-changed": "<span class="d2h-tag d2h-changed d2h-changed-tag">MODIFIED</span>" }

    For more information regarding the possible templates look intosrc/templates

Diff2Html Browser

Import the stylesheet and the library code.

To load correctly in the Browser you need to include the stylesheet in the final HTML.

<!-- CSS -->
<link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/diff2html/bundles/css/diff2html.min.css" />

<!-- Javascripts -->
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/diff2html/bundles/js/diff2html.min.js"></script>

It will now be available as a global variable named Diff2Html.

document.addEventListener('DOMContentLoaded', () => {
  var diffHtml = Diff2Html.html('<Unified Diff String>', {
    drawFileList: true,
    matching: 'lines',
    outputFormat: 'side-by-side',
  });
  document.getElementById('destination-elem-id').innerHTML = diffHtml;
});

Diff2Html NPM / Node.js Library

const Diff2html = require('diff2html');
const diffJson = Diff2html.parse('<Unified Diff String>');
const diffHtml = Diff2html.html(diffJson, { drawFileList: true });
console.log(diffHtml);

Diff2Html Examples

Example with Angular

  • Typescript
import * as Diff2Html from 'diff2html';
import { Component, OnInit } from '@angular/core';

export class AppDiffComponent implements OnInit {
  outputHtml: string;
  constructor() {
    this.init();
  }

  ngOnInit() {}

  init() {
    let strInput =
      '--- a/server/vendor/golang.org/x/sys/unix/zsyscall_linux_mipsle.go\n+++ b/server/vendor/golang.org/x/sys/unix/zsyscall_linux_mipsle.go\n@@ -1035,6 +1035,17 @@ func Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (\n \n // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n \n+func Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) {\n+\tr0, _, e1 := Syscall6(SYS_PSELECT6, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), uintptr(unsafe.Pointer(sigmask)))\n+\tn = int(r0)\n+\tif e1 != 0 {\n+\t\terr = errnoErr(e1)\n+\t}\n+\treturn\n+}\n+\n+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n+\n func read(fd int, p []byte) (n int, err error) {\n \tvar _p0 unsafe.Pointer\n \tif len(p) > 0 {\n';
    let outputHtml = Diff2Html.html(strInput, { drawFileList: true, matching: 'lines' });
    this.outputHtml = outputHtml;
  }
}
  • HTML
<!DOCTYPE html>
<html>
  <head>
    <title>diff2html</title>
  </head>
  <body>
    <div [innerHtml]="outputHtml"></div>
  </body>
</html>
  • .angular-cli.json - Add styles
"styles": [
  "diff2html.min.css"
]

Example with Vue.js

<template>
  <div v-html="prettyHtml" />
</template>

<script>
import * as Diff2Html from 'diff2html';
import 'diff2html/bundles/css/diff2html.min.css';

export default {
  data() {
    return {
      diffs:
        '--- a/server/vendor/golang.org/x/sys/unix/zsyscall_linux_mipsle.go\n+++ b/server/vendor/golang.org/x/sys/unix/zsyscall_linux_mipsle.go\n@@ -1035,6 +1035,17 @@ func Prctl(option int, arg2 uintptr, arg3 uintptr, arg4 uintptr, arg5 uintptr) (\n \n // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n \n+func Pselect(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timespec, sigmask *Sigset_t) (n int, err error) {\n+\tr0, _, e1 := Syscall6(SYS_PSELECT6, uintptr(nfd), uintptr(unsafe.Pointer(r)), uintptr(unsafe.Pointer(w)), uintptr(unsafe.Pointer(e)), uintptr(unsafe.Pointer(timeout)), uintptr(unsafe.Pointer(sigmask)))\n+\tn = int(r0)\n+\tif e1 != 0 {\n+\t\terr = errnoErr(e1)\n+\t}\n+\treturn\n+}\n+\n+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT\n+\n func read(fd int, p []byte) (n int, err error) {\n \tvar _p0 unsafe.Pointer\n \tif len(p) > 0 {\n',
    };
  },
  computed: {
    prettyHtml() {
      return Diff2Html.html(this.diffs, {
        drawFileList: true,
        matching: 'lines',
        outputFormat: 'side-by-side',
      });
    },
  },
};
</script>

Troubleshooting

1. Out of memory or Slow execution

Causes:

  • Big files
  • Big lines

Fix:

  • Disable the line matching algorithm, by setting the option {"matching": "none"} when invoking diff2html

Contribute

This is a developer friendly project, all the contributions are welcome. To contribute just send a pull request withyour changes following the guidelines described in CONTRIBUTING.md. I will try to review them as soon as possible.

Contributors

Thanks goes to these wonderful people (emoji key):


Rodrigo Fernandes

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stockmind

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Ivan Vorontsov

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Nick Brewer

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Matt Wade

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Rafael Cortês

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Nuno Teixeira

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Koki Oyatsu

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James Monger

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Wessel van der Pal

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jk-kim

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Sergey Semenov

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Nick Mitchell

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Samir Aguiar

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pubkey

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Илья

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Mohamed Akram

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Eugene Marcotte

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Dima Sabanin

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Ben Abbott

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弘树@阿里

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Mikko Rantanen

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Ann

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escitalopram

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dependabot[bot]

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Josh Goldberg

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This project follows the all-contributors specification.Contributions of any kind welcome!

License

Copyright 2014-present Rodrigo Fernandes. Released under the terms of the MIT license.

Thanks

This project is inspired in pretty-diff byScott González.


  • npm install -g diff2html-cli 示例: diff2html -F my-pretty-diff.html HEAD~6 导出前6个commit 的diff  diff2html --help 可以查看帮助文档 分享几个非常好用的VSCode插件 Markdown All in One review  Markdown PDF Markdown Preview Mermai

  • 在比较两个文件的时候,有一个文件存在一些空行,或者两个文件的换行符不一致,或者存在tab和空格显示的不同,在比较的时候希望忽略掉这些空白字符,只比较文本是否一致,并在diff返回显示的时候将返回内容并列显示,且只显示文件中不同的内容,不显示序号或者行号 查看文本空白行的行号 1.grep grep -n ^$ file.txt grep -n 显示符合条件的行号 ^ 表示行首 $ 表示行尾,^$

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