【nodejs】 npm 注意事项

官网：https://www.npmjs.com/

1.安装时要切换到nodejs根目录，  否则就会安装到安装时所在的目录

2.要有管理员权限（win），如需指定版本，如npm install express@3.0.6

3.官方demo 提供比较全的依赖配置 http://www.hacksparrow.com/jquery-with-node-js.html

4.看一个demo

var $ = require('jquery');
var http = require('http');

var options = {
    host: 'jquery.com',
    port: 80,
    path: '/'
};

var html = '';
http.get(options, function(res) {
    res.on('data', function(data) {
        // collect the data chunks to the variable named "html"
        html += data;
    }).on('end', function() {
        // the whole of webpage data has been collected. parsing time!
        var title = $(html).find('title').text();
        console.log(title);
     });
});

var jsdom = require("jsdom"); 

jsdom 4.x onward only works on io.js, not Node.js