cheerio 服务器端的jquery

cheerio

https://cheerio.js.org/

Fast, flexible, and lean implementation of core jQuery designed specifically for the server.

Features

❤ Familiar syntax: Cheerio implements a subset of core jQuery. Cheerio removes all the DOM inconsistencies and browser cruft from the jQuery library, revealing its truly gorgeous API.

ϟ Blazingly fast: Cheerio works with a very simple, consistent DOM model. As a result parsing, manipulating, and rendering are incredibly efficient.

❁ Incredibly flexible: Cheerio wraps around @FB55’s forgiving htmlparser2. Cheerio can parse nearly any HTML or XML document.

例子

const cheerio = require('cheerio');
const $ = cheerio.load('<ul id="fruits">...</ul>');

$('.apple', '#fruits').text()
//=> Apple

$('ul .pear').attr('class')
//=> pear

$('li[class=orange]').html()
//=> Orange

用处

可以用作服务器端的网页爬虫， 解析前端的静态页面。

因为一般页面的主页都使用静态页面， 来提高SEO， 和首屏的页面相应度。使用这种工具正好可以应对， 静态页面解析， 提取有用数据。

还可以处理静态页面， 给静态页面添加一些页面元素，或者脚本， 在代理的角色中，对往来网页做修改。

其它

Cheerio is not a web browser

Cheerio parses markup and provides an API for traversing/manipulating the resulting data structure. It does not interpret the result as a web browser does. Specifically, it does not produce a visual rendering, apply CSS, load external resources, or execute JavaScript. If your use case requires any of this functionality, you should consider projects like PhantomJS or JSDom.