nodejs如何文件内容进行替换

读取文件内容

const fs = require('fs');
 
fs.readFile('./test.txt', 'utf8', (err, data) => {
  if (err) throw err;
  console.log(data);
});

替换文件内容

const fs = require('fs');
 
fs.readFile('./test.txt', 'utf8', (err, data) => {
  if (err) throw err;
 
  const replacedData = data.replace(/foo/g, 'bar');
 
  console.log(replacedData);
});

写入替换后的内容

const fs = require('fs');
 
fs.readFile('./test.txt', 'utf8', (err, data) => {
  if (err) throw err;
 
  const replacedData = data.replace(/foo/g, 'bar');
 
  fs.writeFile('./test.txt', replacedData, 'utf8', (err) => {
    if (err) throw err;
    console.log('File saved');
  });
});