Официальный Плагины Разработка

Cheerio

Универсальное

Установка

npm install cheerio (см. README)

Описание

Cheerio — быстрая библиотека разбора HTML для Node.js: API в стиле jQuery — селекторы, traversal, манипуляции с DOM привычными методами, работает на парсере htmlparser2 без виртуального браузера, молниеносная обработка больших документов, TypeScript-типы, сериализация обратно в HTML. Стандартный выбор для серверного извлечения данных из разметки в связке с HTTP-клиентами.

Что умеет:
— парсить HTML серверно;
— выбирать элементы селекторами jQuery;
— извлекать и изменять данные;
— работать быстро без браузера.

Полная документация ниже — автоматически из репозитория cheeriojs/cheerio (ветка main). Оригинальные материалы проекта распространяются на условиях его лицензии.

cheerio

The fast, flexible, and elegant library for parsing and manipulating HTML and XML.

中文文档 (Chinese Readme)

import * as cheerio from 'cheerio';
const $ = cheerio.load('<h2 class="title">Hello world</h2>');

$('h2.title').text('Hello there!');
$('h2').addClass('welcome');

$.html();
//=> <html><head></head><body><h2 class="title welcome">Hello there!</h2></body></html>

Installation

Install Cheerio using a package manager like npm, yarn, bun, or Deno.

npm install cheerio
# or
bun add cheerio
# or
deno install cheerio

Features

❤ Proven 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
parse5 for parsing HTML and can optionally
use the forgiving htmlparser2. Cheerio
can parse nearly any HTML or XML document. Cheerio works in both browser and
server environments.

API

Loading

First you need to load in the HTML. This step in jQuery is implicit, since
jQuery operates on the one, baked-in DOM. With Cheerio, we need to pass in the
HTML document.

// ESM or TypeScript:
import * as cheerio from 'cheerio';

// In other environments:
const cheerio = require('cheerio');

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

$.html();
//=> <html><head></head><body><ul id="fruits">...</ul></body></html>

Selectors

Once you’ve loaded the HTML, you can use jQuery-style selectors to find elements
within the document.

$( selector, [context], [root] )

selector searches within the context scope which searches within the root
scope. selector and context can be a string expression, DOM Element, array
of DOM elements, or cheerio object. root, if provided, is typically the HTML
document string.

This selector method is the starting point for traversing and manipulating the
document. Like in jQuery, it’s the primary method for selecting elements in the
document.

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

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

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

Rendering

When you’re ready to render the document, you can call the html method on the
"root" selection:

$.root().html();
//=>  <html>
//      <head></head>
//      <body>
//        <ul id="fruits">
//          <li class="apple">Apple</li>
//          <li class="orange">Orange</li>
//          <li class="pear">Pear</li>
//        </ul>
//      </body>
//    </html>

If you want to render the
outerHTML
of a selection, you can use the outerHTML prop:

$('.pear').prop('outerHTML');
//=> <li class="pear">Pear</li>

You may also render the text content of a Cheerio object using the text
method:

const $ = cheerio.load('This is <em>content</em>.');
$('body').text();
//=> This is content.

The "DOM Node" object

Cheerio collections are made up of objects that bear some resemblance to
browser-based DOM nodes.
You can expect them to define the following properties:

tagName
parentNode
previousSibling
nextSibling
nodeValue
firstChild
childNodes
lastChild

Screencasts

https://vimeo.com/31950192

This video tutorial is a follow-up to Nettut’s "How to Scrape Web Pages with
Node.js and jQuery", using cheerio instead of JSDOM + jQuery. This video shows
how easy it is to use cheerio and how much faster cheerio is than JSDOM +
jQuery.