类型错误`[ERR_INVALID_CALLBACK]`：在 NodeJs 上

Question

Received undefined throw new ERR_INVALID_CALLBACK(cb);

const fs = require("fs");
const text = "File ";

fs.writeFile("node-message.txt", text)
  .then(() => {
    console.log("File Created");
  })
  .catch(() => {
    console.log("File not created");
  });

I am getting this TypeError [ERR_INVALID_CALLBACK] : Callback must be a function.

Answer 1

You have to require an fs module with promises if you are facing an invalid callback type error.

    const fs = require("fs").promises;
    const text = "File ";
    
    fs.writeFile("node-message.txt", text)
      .then(() => {
        console.log("File Created");
      })
      .catch(() => {
        console.log("File not created");
      });