Node.js使用cheerio解析html

cheerio语法类似jQuery

doc

• doc-zh: https://github.com/cheeriojs/cheerio/wiki/Chinese-README

安装

npm i cheerio

  

 

  
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代码实例

const cheerio = require("cheerio");

const doc = cheerio.load('<h2 class="title">Hello world</h2>', {
  xmlMode: true,
  decodeEntities: false
});

doc("h2.title").text("Hello there!");
doc("h2").addClass("welcome");

console.log(doc.xml());
// <h2 class="title welcome">Hello there!</h2>


  

 

  
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项目实战

import cheerio from "cheerio";

/**
 *  将外链图片转为本站连接
 * @param {*} html
 * @returns
 */
export async function replaceImage(html) { const doc = cheerio.load(html, { xmlMode: true, decodeEntities: false
  }); let elems = []; // each不等待promise
  doc("img").each(function(index, elem) { elems.push(doc(this));
  }); for (let elem of elems) { let src = elem.attr("src"); if (src && src.indexOf(process.env.VUE_APP_BASE_URL) == -1) { // 修改为自己的替换方法 let imageSrc = await saveImage(src); if (imageSrc) { elem.attr("src", imageSrc); } }
  } return doc.xml();
}

/**
 *  提取图片连接
 * @param {*} html
 * @returns
 */
export function extractImages(html) { const doc = cheerio.load(html, { xmlMode: true, decodeEntities: false
  }); let images = []; doc("img").each(function(index, elem) { let src = doc(this).attr("src"); if (src) { images.push(src); }
  }); return images;
} /**
 *  移除style属性
 * @param {*} html
 * @returns
 */
export function removeStyle(html) {
  const doc = cheerio.load(html, { xmlMode: true, decodeEntities: false
  }); doc("*[style]").removeAttr("style"); return doc.xml();
}


  

 

  
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参考
https://www.npmjs.com/package/cheerio

文章来源: pengshiyu.blog.csdn.net，作者：彭世瑜，版权归原作者所有，如需转载，请联系作者。

原文链接：pengshiyu.blog.csdn.net/article/details/106361156