理由：烦正则表达式。
var cheerio = require(‘cheerio‘), $ = cheerio.load(‘<h2 class = "title">Hello world</h2>‘); $(‘h2.title‘).text(‘Hello there!‘); $(‘h2‘).addClass(‘welcome‘); $.html(); //=> <h2 class = "title welcome">Hello there!</h2>
原文：http://www.cnblogs.com/yasir/p/js_cheerio.html