Kdiff

Module for comparing two txt files using longest common subsequence

basic setup

npm install
npm run build

test command

npm run test

cli command (run at root directory)

node ./lib/cli.js [file1 path] [file2 path] 
or 
npm run cli-test

cli return value format & sample

[file1 line#] [diff type] [file2 line#]
< (mark for delete line) [line content]
> (mark for add line) [line content]

1d0
< a
3,5c2
< c
< d
< e
---
> c

library return value format

Diff { 
  deleted: {
    [line1]: [text string1],
    [line2]: [text string2],
    [line3]: [text string3],
    ...
  },
  added: {
    [line1]: [text string1],
    [line2]: [text string2],
    [line3]: [text string3],
    ...
  }
}

Available as an npm module

how to setup on your project

npm install kdiff

basic implementation

1. sample code (on index.js)

const {diff} = require('kdiff');

var result = diff('[file1 path]', '[file2path]');
console.log(result);
console.log(result.deleted);
console.log(result.added);

2. run code

node index.js

3. sample output

Diff {
  deleted: { '1': 'a', '3': 'c', '5': 'e' },
  added: { '3': 'e', '4': 'f' }
}
{ '1': 'a', '3': 'c', '5': 'e' }
{ '3': 'e', '4': 'f' }