SyntaxError: Unexpected token *

Hi. I’m trying to follow the starter guide and I’m get the following error:

var koa = require('koa');
var app = koa();

app.use(function *(){
  this.body = 'Hello World';
});

app.listen(3000);

SyntaxError: Unexpected token *
    at Module._compile (module.js:439:25)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:902:3

I’m using node 0.10.24 and executing the script using node --harmony

[haoxins]

run with ‘node --harmony app.js’，not ‘node app.js’

[Thomasdezeeuw]

Also an easy way to install Node version is N: https://github.com/visionmedia/n.