Node.JS在命令行中检查Chrome浏览器是否安装并打开

var fs     = require('fs')
var os     = require('os')
var cp     = require('child_process')
var path    = require('path')
var open = function(url) {
 var userInfo  = os.userInfo()
 var chromePath = path.join(userInfo.homedir, 'Local Settings\\Application Data\\Google\\Chrome\\Application\\chrome.exe')
 var openByIE  = function() {
  cp.exec('start iexplore ' + url, function(err, stdout, stderr) {
   if (err) {
    console.log(err)
   }
  })
 }
 fs.stat(chromePath, function(err) {
  if (err) {
   openByIE()
   return
  }
  cp.exec('start chrome2 ' + url, function(err, stdout, stderr) {
   if (err) {
    openByIE()
    return
   }
  })
 })
}