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js-parse-html

v1.0.1

Published

提供在node中的html解析功能,用于爬虫程序的开发。 使用了简单常见的操作方式,类似于chrome等浏览器提供的DOM操作API。

Readme

js-parse-html

一个简单的HTML解析器

提供在node中的html解析功能,用于爬虫程序的开发。 使用了简单常见的操作方式,类似于chrome等浏览器提供的DOM操作API。

如何使用

安装

$ npm i js-parse-html

在你的主程序中,例如:

./server.js

var htmlParser = require('js-parse-html')
var html =
`
    <p class="p1">
        这是一个p标签
        <a href="http://skipper.fun" class="link">skipper首页</a>
    </p>
`
var doc = htmlParser(html)

var p1 = doc.getElementsByClassName('p1')[0]
p1.getAttribute('class')                    //"p1"

var a = p1.getElementsByTagName('a')[0]     //"a"
a.getAttribute('class')                     //"link"

//一切都很DOM

优势

  • 使用了线性生成DOM树,测试解析377行html仅需约20ms「版本 66.0.3359.181(正式版本) (64 位)in MF839」

注意

因为工作量还不够,现在标签不允许直接使用属性访问标签属性,需要使用getAttribute方法,例如:

//错误
var a = doc.getElementsByClassName('link')[0]
a.href //undefined

//正确
a.getAttribute('href')

已知bug

  • meta viewport 无法解析
  • 间隔的文本无法解析