diff two text with enhanced inline diff

diff.js

require('colors');
const jsdiff = require('diff')
const stringSimilarity = require('string-similarity');
const text1 = `
{
  "name": "calcit-editor",
  "version": "0.3.50",
  "description": "Cirru Calcit Editor",
  "bin": {
    "calcit-editor": "dist/server.js",
    "ce": "dist/server.js"
  },
  "scripts": {
    "watch": "shadow-cljs watch client server",
    "serve": "http-server dist -s",
    "repl": "rlwrap shadow-cljs clj-repl",
    "build": "shadow-cljs clj-run build.main/build",
    "build-local": "shadow-cljs clj-run build.main/build-local",
    "upload": "lumo -c cli/ -m build.upload"
  },
  "repository": {
    "type": "git",
    "url": "[email protected]:Cirru/calcit-editor.git"
  },
  "author": "jiyinyiyong",
  "license": "MIT",
  "devDependencies": {
    "http-server": "^0.11.1",
    "shadow-cljs": "^2.6.2",
    "source-map-support": "^0.5.9"
  },
  "dependencies": {
    "chalk": "^2.4.1",
    "dayjs": "^1.7.5",
    "express": "^4.16.3",
    "gaze": "^1.1.3",
    "md5": "^2.2.1",
    "serve-index": "^1.9.1",
    "shortid": "^2.2.13",
    "ws": "^6.0.0"
  }
}
`

const text2 = `
{
  "name": "calcit-editor",
  "version": "0.3.51",
  "description": "Great Cirru Calcit Editor",
  "bin": {
    "calcit-editor": "dist/server.js",
    "ce": "dist/server.js"
  },
  "scripts": {
    "watch": "shadow-cljs watch client server",
    "serve": "http-server dist -s",
    "build": "shadow-cljs clj-run build.main/build",
    "page": "shadow-cljs clj-run build.main/page",
    "build-local": "shadow-cljs clj-run build.main/build-local",
    "upload": "lumo -c cli/ -m build.upload"
  },
  "repository": {
    "type": "git",
    "url": "[email protected]:Cirru/calcit-editor.git"
  },
  "author": "jiyinyiyong",
  "license": "MIT",
  "devDependencies": {
    "express": "^0.11.1",
    "shadow-cljs": "^2.6.2",
    "source-map-support": "^0.5.9"
  },
  "dependencies": {
    "chalk": "^2.4.1",
    "dayjs": "^1.7.5",
    "express": "^4.16.3",
    "gaze": "^1.1.3",
    "md256": "^2.2.1",
    "serve-index": "^1.9.1",
    "shortid": "^2.2.13",
    "ws": "^6.0.0"
  }
}
`

const diffResult = jsdiff.diffLines(text1, text2)

console.log(diffResult)

const noNewlineLog = process.stderr.write.bind(process.stderr)

let added = ''
let removed = ''

const originalCompareResult = []
const compareResult = []

diffResult.forEach(function (part) {
  // 保存原始的行行对比结果
  var color = part.added ? 'green' :
    part.removed ? 'red' : 'grey';
  originalCompareResult.push(part.value[color]);


  // 开始优化版本的逻辑
  if (part.added === void 0 && part.removed === void 0) {

    if (removed && added) {
      const similarity = stringSimilarity.compareTwoStrings(removed, added);

      // 判断相似性
      if (similarity < 0.8) {
        // 如果不相似就照常
        compareResult.push(removed.red)
        compareResult.push(added.green)
      } else {
        // 相似的话比较行内差异
        const charsDiff = jsdiff.diffChars(removed, added);
        const inlineCompareResult1 = []
        const inlineCompareResult2 = []
        charsDiff.forEach(function(part){
          if (part.added === void 0 && part.removed === void 0) {
            inlineCompareResult1.push(part.value.red);
            inlineCompareResult2.push(part.value.green);
          } else if (part.removed) {
            inlineCompareResult1.push(part.value.bgRed)
          } else if (part.added) {
            inlineCompareResult2.push(part.value.bgGreen)
          }
          // var color = part.added ? 'green' :
          //   part.removed ? 'red' : 'grey';
          // inlineCompareResult.push(part.value[color]);
        });
        compareResult.push(inlineCompareResult1.join(''))
        compareResult.push(inlineCompareResult2.join(''))
      }
    } else {
      removed && compareResult.push(removed.red)
      added && compareResult.push(added.green)
    }

    compareResult.push(part.value.grey)

    removed = ''
    added = ''
  }
  if (part.removed) {
    removed = part.value
  }
  if (part.added) {
    added = part.value
  }

})

console.log('----------')
noNewlineLog(originalCompareResult.join(''))

console.log('----------')

noNewlineLog(compareResult.join(''))