wh1100717

function getViewport() {

    var viewPortWidth;
    var viewPortHeight;

    // the more standards compliant browsers (mozilla/netscape/opera/IE7) use window.innerWidth and window.innerHeight
    if (typeof window.innerWidth != 'undefined') {
        viewPortWidth = window.innerWidth,
        viewPortHeight = window.innerHeight
    }

wh1100717

define (require, exports, module) ->
    'use strict'
 
    BinaryParser = require('lib/binary-parser')
 
    hexTable = ((if i <= 15 then '0' else '') + i.toString(16) for i in [0...256])

    class ObjectID
        constructor: (id, _hex) ->
            @_bsontype = 'ObjectID'

wh1100717

# 如果是 node 环境，则通过 exports 来获取全局域
# 如果是 BOM 环境，则通过 this 来获取全局域
root = exports ? this