基于node.js实现爬虫的讲解

var cheerio = require('cheerio');var request = require('request');var startUrl = 'http://www.baidu.com'request(startUrl, function(err, response) {  if (err) {    console.log(err);  }  var $ = cheerio.load(response.body);  var title = $('title').text();  console.log(title);}

var $=cheerio.load('<div class="container"></div>'); $('.container')

$('a.downbtn').attr('href')

var url = var $ = cheerio.load(data);  $("a.downbtn").each(function(i, e) {    console.log($(e).attr("href"));  });  console.log("done"); } else {   console.log("error"); }