The path module is a built-in module in nodejs for processing file/directory paths. It can be regarded as a toolbox, providing many methods for us to use, of course all related to path processing. At the same time, the path module appears frequently in front-end development, such as when configuring webpack. This article will talk about the path module of node.

node’s path module

Foreword: Through this article you will understand node Some API
of the path built-in module can be viewed on thenode official websiteif necessary. Of course practice is greater than theory
So I prepared a case for practice

1. First introduction to the path module

The path module is a moduleofficially provided by Node.js forprocessing paths. It provides a series of methods and attributes to meet users' needs for path processing.

2.path module API

2.1 path.join()

path.join() method, used to splice multiple path fragments into a complete path string

The syntax format is

…paths(string) The sequence of path fragments is all the path series you need to splice. [Related tutorial recommendations:nodejs video tutorial,Programming teaching]

##It should be noted that the returned value is string

//引入path模块 const path=require("path") //书写要拼接的路径 const pathStr=path.join('/a','/b/c','../','./d','e') console.log(pathStr)

##2.2 path.basename()

path

Syntax format

• Optional parameter, representing the file extension
• Represents the last part of the path

• const path=require("path") const fpath='./a/b/c/index.html' var fullname=path.basename(fpath) console.log(fullname) //获取指定后缀的文件名 const namepath=path.basename(fpath,'.html') console.log(namepath)

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2.3 path.extname()

path is a required parameter, a string representing a path
Return: Return the obtained extension string

• const path=require("path") const fpath='./a/b/c/d/index.html' const ftext =path.extname(fpath) console.log(ftext)

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3. Clock case practice

Split into three files, namely index.html index.css index. js and store it in a prepared file

Source codeRight click to view the source code

3.1 Implementation steps

','') //将匹配的css写入到指定的index.css文件中 fs.writeFile(path.join(__dirname,'/static/index.css'),newcss,function(err){ if(err) return console.log("导入失败"+err.message) console.log("ojbk") }) } function resolveJS(htmlStr){ const r2=scriptruler.exec(htmlStr) const newcss=r2[0].replace('','') //将匹配的css写入到指定的index.js文件中 fs.writeFile(path.join(__dirname,'/static/index.js'),newcss,function(err){ if(err) return console.log("导入失败"+err.message) console.log("ojbk") }) } function resolveHTML(htmlStr){ const newhtml=htmlStr .replace(regStyle,'') .replace(scriptruler,'') //将匹配的css写入到指定的index.html文件中 fs.writeFile(path.join(__dirname,'/static/index2.html'),newhtml,function(err){ if(err) return console.log("导入失败"+err.message) console.log("ojbk") }) }

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