也许“replace”模块(www.npmjs.org/package/replace)也适合您。它不需要您读取然后写入文件。

改编自文档:

// install:

npm install replace 

// require:

var replace = require("replace");

// use:

replace({
    regex: "string to be replaced",
    replacement: "replacement string",
    paths: ['path/to/your/file'],
    recursive: true,
    silent: true,
});

我会使用双工流代替。就像这里记录的nodejs doc双工流

Transform流是计算输出的双工流 离输入有一段距离。

也许“replace”模块(www.npmjs.org/package/replace)也适合您。它不需要您读取然后写入文件。

改编自文档:

// install:

npm install replace 

// require:

var replace = require("replace");

// use:

replace({
    regex: "string to be replaced",
    replacement: "replacement string",
    paths: ['path/to/your/file'],
    recursive: true,
    silent: true,
});

在Linux或Mac上，keep很简单，只需使用sed和shell。不需要外部库。下面的代码可以在Linux上运行。

const shell = require('child_process').execSync
shell(`sed -i "s!oldString!newString!g" ./yourFile.js`)

Mac上的sed语法有点不同。我现在不能测试它，但我相信你只需要在“-i”后面添加一个空字符串:

const shell = require('child_process').execSync
shell(`sed -i "" "s!oldString!newString!g" ./yourFile.js`)

最后一个“!”后面的“g”使sed替换一行上的所有实例。删除它，将只替换每行中第一个出现的内容。

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)

扩展@Sanbor的回答，最有效的方法是将原始文件作为流读取，然后也将每个块流到一个新文件中，然后最后用新文件替换原始文件。

async function findAndReplaceFile(regexFindPattern, replaceValue, originalFile) {
  const updatedFile = `${originalFile}.updated`;

  return new Promise((resolve, reject) => {
    const readStream = fs.createReadStream(originalFile, { encoding: 'utf8', autoClose: true });
    const writeStream = fs.createWriteStream(updatedFile, { encoding: 'utf8', autoClose: true });

    // For each chunk, do the find & replace, and write it to the new file stream
    readStream.on('data', (chunk) => {
      chunk = chunk.toString().replace(regexFindPattern, replaceValue);
      writeStream.write(chunk);
    });

    // Once we've finished reading the original file...
    readStream.on('end', () => {
      writeStream.end(); // emits 'finish' event, executes below statement
    });

    // Replace the original file with the updated file
    writeStream.on('finish', async () => {
      try {
        await _renameFile(originalFile, updatedFile);
        resolve();
      } catch (error) {
        reject(`Error: Error renaming ${originalFile} to ${updatedFile} => ${error.message}`);
      }
    });

    readStream.on('error', (error) => reject(`Error: Error reading ${originalFile} => ${error.message}`));
    writeStream.on('error', (error) => reject(`Error: Error writing to ${updatedFile} => ${error.message}`));
  });
}

async function _renameFile(oldPath, newPath) {
  return new Promise((resolve, reject) => {
    fs.rename(oldPath, newPath, (error) => {
      if (error) {
        reject(error);
      } else {
        resolve();
      }
    });
  });
}

// Testing it...
(async () => {
  try {
    await findAndReplaceFile(/"some regex"/g, "someReplaceValue", "someFilePath");
  } catch(error) {
    console.log(error);
  }
})()