Syntax error issues on preact create

[bobc82]

I tried to run the preact-cli installation as follows:

sudo npm i -g preact-cli

And preact-cli was installed as expected. After, i tried to create a project:

sudo preact create example-app

On the first attempt terminal returned the following Syntax Error:

/usr/local/lib/node_modules/preact-cli/node_modules/webpack-plugin-replace/lib/index.js:9
	let i=0, len=arr.length, map=new Map();
	^^^

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:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/lib/webpack/webpack-base-config.js:25:29)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/lib/webpack/webpack-client-config.js:39:26)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/lib/webpack/run-webpack.js:27:28)

I tried to fix myself this issue adding on top of /usr/local/lib/node_modules/preact-cli/node_modules/webpack-plugin-replace/lib/index.js file:

"use strict";

In the second attempt, the preact create command fired another Syntax error, as follows:

/usr/local/lib/node_modules/preact-cli/node_modules/devcert-san/dist/index.js:22
function devcert(appName, options = {}) {
                                  ^

SyntaxError: Unexpected token =
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/lib/ssl-cert.js:5:19)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/commands/watch.js:9:16)
    at Module._compile (module.js:410:26)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Module.require (module.js:354:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (/usr/local/lib/node_modules/preact-cli/lib/index.js:16:14)

The platform where i'm attempting to create the preact project is Ubuntu 16.04.

[rkostrzewski]

Could please provide us with your node version (node -v) ?

[bobc82]

v4.2.6

[thangngoc89]

@bobc82 we only support Node.js >= 6.0 (current LTS). Please update your node version

[developit]

Also I'd recommend avoiding sudo - it's setting all the permissions wrong for everything you install, and gives root access to arbitrary code downloaded from the internet. There's a great guide that walks you through removing the sudo requirement.

[reznord]

It would be great to add a check for minimum requirements before we run preact create

[bobc82]

I upgraded node at the latest version and now preact create runs fine. And i'll try to reconfigure all avoiding 'sudo'. Thank you everyone!

[thangngoc89]

@bobc82 quick tip: Use nvm to manage your node version. No need for manual config