How to resolve fs.existsSync is not a function

Question

In NodeJS I have:

const fs = require(\'fs\');
if (!fs.existsSync(\"some_path\")) {
...
}

But I get the error:

TypeEr

Answer 1

I had the same error that you have. Your vscode might have added a new module to your js file. Remove that module and your app should work just fine.

Answer 2

You can allow webpack to use the Node's require and include fs etc. by targeting node in the config:

module.exports = {
  entry: './src/main.js',
  target: 'node',
  output: {
    path: path.join(__dirname, 'build'),
    filename: 'backend.js'
  }
}

As described here: https://webpack.js.org/concepts/targets/ and https://webpack.js.org/configuration/target/

Answer 3

I was facing the same Error like TypeError: fs.existsSync is not a function

So, I figured out that in import there is one extra line added automatically that was creating this issue.

after removing this line from import

import { TRUE } from "node-sass";

the issue has been resolved.