如果有人想使用基于承诺的'fs'模块的任务。

const fs = require('fs').promises;

// Below statements must be wrapped inside the 'async' function:
const data = await fs.readFile(someFile, 'utf8');
const result = data.replace(/string to be replaced/g, 'replacement');
await fs.writeFile(someFile, result,'utf8');

如果有人想使用基于承诺的'fs'模块的任务。

const fs = require('fs').promises;

// Below statements must be wrapped inside the 'async' function:
const data = await fs.readFile(someFile, 'utf8');
const result = data.replace(/string to be replaced/g, 'replacement');
await fs.writeFile(someFile, result,'utf8');

你可以使用简单的正则表达式:

var result = fileAsString.replace(/string to be replaced/g, 'replacement');

所以…

var fs = require('fs')
fs.readFile(someFile, 'utf8', function (err,data) {
  if (err) {
    return console.log(err);
  }
  var result = data.replace(/string to be replaced/g, 'replacement');

  fs.writeFile(someFile, result, 'utf8', function (err) {
     if (err) return console.log(err);
  });
});

你也可以使用'sed'函数，它是ShellJS的一部分…

 $ npm install [-g] shelljs


 require('shelljs/global');
 sed('-i', 'search_pattern', 'replace_pattern', file);

完整的文档…

ShellJS - sed（） ShellJS

ES2017/8 for Node 7.6+，带有用于原子替换的临时写文件。

const Promise = require('bluebird')
const fs = Promise.promisifyAll(require('fs'))

async function replaceRegexInFile(file, search, replace){
  let contents = await fs.readFileAsync(file, 'utf8')
  let replaced_contents = contents.replace(search, replace)
  let tmpfile = `${file}.jstmpreplace`
  await fs.writeFileAsync(tmpfile, replaced_contents, 'utf8')
  await fs.renameAsync(tmpfile, file)
  return true
}

注意，仅适用于较小的文件，因为它们将被读入内存。

通常，我使用tiny-replace-files替换文件中的文本。这个pkg更小更轻… https://github.com/Rabbitzzc/tiny-replace-files

import { replaceStringInFilesSync } from 'tiny-replace-files'

const options = {
  files: 'src/targets/index.js',
  from: 'test-plugin',
  to: 'self-name',
}

# await
const result = replaceStringInFilesSync(options)
console.info(result)