JN_newbie JN_newbie - 1 year ago 298
Javascript Question

SyntaxError: Block-scoped declarations in node.js webstorm

I am very much new to ES6, and have wrote a sample class code in node.js using webstorm ide.

'user strict';

class PersonClass {
constructor(name) {
this.name = name;

sayName() {

let person = new PersonClass('My Name');

When I run the code it displays an error

class PersonClass {

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
at exports.runInThisContext (vm.js:53:16)
at Module._compile (module.js:373:25)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:974:3

Even though I have installed babel-cli, babel-presets-es2015. How can I fix it.

Answer Source

You have a typo, try writing use strict instead of user strict

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