cheerio 服務器端的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 

 

用處

能夠用做服務器端的網頁爬蟲， 解析前端的靜態頁面。

由於通常頁面的主頁都使用靜態頁面， 來提升SEO， 和首屏的頁面相應度。使用這種工具正好能夠應對， 靜態頁面解析， 提取有用數據。

 

還能夠處理靜態頁面， 給靜態頁面添加一些頁面元素，或者腳本， 在代理的角色中，對往來網頁作修改。

 

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.