如何将html源代码中的css样式代码与js代码和dom代码进行分离?
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可以使用正则来匹配分离一个html文档的js和css文件,代码如下:
var fs = require('fs') // 删除文件 const deleteFile = (path)=>{ return new Promise(resolve => { fs.unlink(path, (err) => { if (err) { console.log(err) return }; console.log(`已成功删除 ${path}文件`); resolve() }); }) } // 删除文件夹 const deleteDir = async (path)=>{ let _files = await new Promise (resolve => { fs.readdir(path, (err,files) => { if (err) { console.log(err) }; console.log(`已成功读取 ${path} 文件夹`); resolve(files) }) }) if(_files && _files.length) { for(let i =0;i<_files.length;i++) { // console.log(_files[i],'innnnnn') await deleteFile('./test/'+ _files[i]) } } // console.log('delete hou') await new Promise(resolve => { fs.rmdir(path, (err) => { if (err) { console.log(err) }; console.log(`已成功删除空 ${path}文件夹`); resolve() }) }); } const emptyDir = (path) => { return new Promise(resolve => { fs.rmdir(path, (err) => { if (err) { console.log(err) }; console.log(`已成功删除空 ${path}文件夹`); resolve() }) }) } // 新建文件夹 /** * */ const mkdirTest = ()=>{ return new Promise(resolve => { fs.mkdir('./test', { recursive: true }, (err, data)=>{ if (err) { console.log(err) }; console.log('新建文件夹成功') resolve() }) }) } // 读取html 内容 /** * */ const readHtml = ()=>{ return new Promise(resolve => { fs.readFile('/test.html', 'utf-8', (err, data)=>{ if(err) { throw Error(err) } console.log('test.html 读取成功!--NO1') resolve(data) }) }) } // 写入css 和js /** * 向文件中追加内容 * @param {是文件名字} path * @param {写入文件的内容} data * @param {文件类型} type * @author erlinger * @time */ const appendFile = (path, data, type) => { return new Promise(resolve => { fs.appendFile(path, data, (err) => { if (err) { console.log(err) }; console.log(`${type}数据已追加到文件`); resolve() }); }) } // 写一个html const writeHtml = (path, data) => { return new Promise(resolve => { fs.writeFile(path, data, (err) =>{ if(err) { console.log('err', err) return } console.log(`${path} 写入成功,功能结束!`); resolve() // 必须resolve 。不然 promise 就到此为止,调用该方法后面的代码将不执行 }) }) } // 方法入口 (async ()=>{ console.log('==========================game-start============================='); let cssReg = /<style>[\s|\S]*?<\/style>/ig; let jsReg = /<script>[\s|\S]*?<\/script>/ig; let allStyleReg = /<\/style>[\s|\S]*?<style>/ig; let allScriptReg = /<\/script>[\s|\S]*?<script>/ig; let cssLink = '<link rel="stylesheet" href="./test.css" rel="external nofollow" >'; let jsrc = '<script src="./test.js"></script>'; let styleCollection, scriptColletion; let cssContent = '', jsContent = '', htmlContentStr = ''; let originContent = await readHtml(); styleCollection = originContent.match(cssReg); scriptColletion = originContent.match(jsReg); // 处理 css for (let i =0;i<styleCollection.length;i++) { cssContent += JSON.stringify(styleCollection[i]); } cssContent = cssContent.replace(/<style>/g,'').replace(/<\/style>/g, '').replace(/("")/g,'') //处理js for (let i =0;i<scriptColletion.length;i++) { jsContent += JSON.stringify(scriptColletion[i]); } jsContent = jsContent.replace(/<script>/g,'').replace(/<\/script>/g, '') .replace(/<\/script>"*<script>/g, '').replace(/("")/g,'') //分离后写入文件 await appendFile('./test/test.css', JSON.parse(cssContent), 'css'); //分离后写入文件 await appendFile('./test/test.js', JSON.parse(jsContent), 'js'); htmlContentStr = originContent .replace(allStyleReg, '') .replace(cssReg, cssLink) .replace(allScriptReg, '') .replace(jsReg, jsrc); //分离后写入文件 await writeHtml('./test/copyTest.html', htmlContentStr); })()