javascript 我怎样才能让cheerio使用CSS操作？

osh3o9ms 于 2022-12-21 发布在 Java

关注(0)|答案(1)|浏览(201)

我的项目是一个使用axios，cheerio和express的webscraper。每次我试图运行这个项目，它都会出错。
我正在使用我朋友的网站作为测试页面。这是我使用的代码：

const express = require('express')
const app = express()
const port = 3000
const publicDir = app.use(express.static('public'))
var cheerio = require('cheerio'); // Basically jQuery for node.js
const { replaceWith } = require('cheerio/lib/api/manipulation');
const axios = require('axios').default;

app.get('/', (req, res) => {
  res.render('/public/index.html')
})

app.get('/imagineoranges', (req, res) => {
  const $ = cheerio.load('/imagineoranges')
  axios.get("https://imagineoranges.neocities.org")
    .then(({data}) => res.send(data))
    .then( $('a:link').css("color: white;") )
    .then( $('a:visited').css("color: yellow;") )
    .then( $('a:hover').css("color: yellow;") )
    .then( $("body").css("@import url('https://fonts.googleapis.com/css2?family=Rubik&display=swap'); background-color: #ff7300; color: white; font-family: 'Rubik', sans-serif;") ) 
})

app.listen(port, () => {
  console.log(`Example app listening on port ${port}`)
})

结果为：

node:internal/modules/cjs/loader:535
      throw e;
      ^

Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './lib/api/manipulation' is not defined by "exports" in /home/lucas/Desktop/UBlock/node_modules/cheerio/package.json
    at new NodeError (node:internal/errors:393:5)
    at throwExportsNotFound (node:internal/modules/esm/resolve:292:9)
    at packageExportsResolve (node:internal/modules/esm/resolve:602:3)
    at resolveExports (node:internal/modules/cjs/loader:529:36)
    at Module._findPath (node:internal/modules/cjs/loader:569:31)
    at Module._resolveFilename (node:internal/modules/cjs/loader:981:27)
    at Module._load (node:internal/modules/cjs/loader:841:27)
    at Module.require (node:internal/modules/cjs/loader:1061:19)
    at require (node:internal/modules/cjs/helpers:103:18)
    at Object.<anonymous> (/home/lucas/Desktop/UBlock/index.js:6:25) {
  code: 'ERR_PACKAGE_PATH_NOT_EXPORTED'
}

Node.js v19.0.1

JavaScript

来源：https://stackoverflow.com/questions/74870659/how-can-i-get-cheerio-to-work-with-css-manipulation

1条答案

按热度按时间

eeq64g8w1#

您应该向Cheerio提供响应HTML，操作文档，然后将其呈现为响应。
您尝试设置的样式看起来更像是应该通过CSS完成的，所以考虑插入一个<style>标签。
例如

app.get("/imagineoranges", async (req, res) => {
  try {
    const { data } = await axios.get("https://imagineoranges.neocities.org", {
      responseType: "text",
    });
    const $ = cheerio.load(data);
    $("head").append(
      `<style type="text/css">@import url(https://fonts.googleapis.com/css2?family=Rubik&display=swap);a:link,body{color:#fff}a:hover,a:visited{color:#ff0}body{background-color:#ff7300;font-family:Rubik,sans-serif}<style>`
    );
    res.set("content-type", "text/html").send($.root().html());
  } catch (err) {
    res.status(err.response?.status ?? 500).send(err.response?.data);
  }
});

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javascript 我怎样才能让cheerio使用CSS操作？

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