Using import fs from fs

Question

I want to use import fs from  fs  in JavaScript  Here is a sample  import fs from  fs   var output   fs readFileSync  someData txt    console log output   The error I get when I run my file using node main js is   function  exports  require  module    filename    dirname    import fs from  fs                                                                        SyntaxError  Unexpected token import  What should I install in Node js in order to achieve importing modules and functions from other places

User · Answer

In order to use import   readFileSync   from  fs   you have to   Be using Node js 10 or later Use the --experimental-modules flag  in Node js 10   e g  node --experimental-modules server mjs  see  3 for explanation of  mjs  Rename the file extension of your file with the import statements  to  mjs   js will not work  e g  server mjs  The other answers hit on 1 and 2  but 3 is also necessary   Also  note that this feature is considered extremely experimental at this point  1 10 stability  and not recommended for production  but I will still probably use it  Here s the Node js 10 ESM documentation

User · Answer

ES6 modules support in Node js is fairly recent  even in the bleeding-edge versions  it is still experimental  With Node js 10  you can start Node js with the --experimental-modules flag  and it will likely work  To import on older Node js versions - or standard Node js 10 - use CommonJS syntax  const fs   require  fs

User · Answer

The new ECMAScript module support is able natively in Node js 12  It was released on 2019-04-23 and it means there is no need to use the flag --experimental-modules  To read more about it  The new ECMAScript module support in Node js 12

User · Answer

It s not supported just yet    If you want to use it you will have to install Babel

User · Answer

If we are using TypeScript  we can update the type definition file by running the command npm install  types node from the terminal or command prompt

User · Answer

Building on RobertoNovelo s answer  import   as fs from  fs    is currently the simplest way to do it  It was tested with a Node js project  Node js v10 15 3   with esm  allowing to use import

User · Answer

For default exports you should use  import   as fs from  fs    Or in case the module has named exports  import  fs  from  fs    Example    module1 js  export function function1       console log  f1      export function function2       console log  f2      export default function1   And then  import defaultExport     function1  function2   from    module1   defaultExport        This calls function1 function1    function2     Additionally  you should use Webpack or something similar to be able to use ES6 import

[javascript] Using import fs from 'fs'

Examples related to javascript

Examples related to es6-modules