Node.js 文件读取方法全解析：同步与异步的多种实现方式

fs.readFileSync

const fs = require('fs');
const readFileSync = fs.readFileSync;
var data = readFileSync("lipsum.txt", { encoding: 'utf-8' })

await fs.readFileSync

const fs = require('fs');
const readFileSync = fs.readFileSync;
async function f(name, options) {
  return readFileSync(name, options);
}

fs.readFile

const fs = require('fs');
const readFile = fs.readFile;
fs.readFile('lipsum.txt', function read(err, data) {...});

fs.readFile、util.promisify

const fs = require('fs');
const util = require('util');
const readFile = util.promisify(fs.readFile);
readFile("lipsum.txt", { encoding: 'utf-8' })
.then((data) => {...})
.catch((err) => {...})

fs.promises

const fs = require('fs/promises');
const readFile = fs.readFile;
readFile("lipsum.txt", { encoding: 'utf-8' })
.then((data) => {...})
.catch((err) => {...})