Path Join() and path The difference between resolve()

nodejs in path.join() and path.resolve()

Basic introduction

__dirname： Returns the absolute path of the current file

introduce path modular

const path = require('path')

Use

path.join()

path.join() The main function is to splice paths

path.join Method is used to connect the path . The main purpose of this method is , Will correctly use the path separator of the current system ,Unix System is ”/“,Windows System is ”\“.

console.log(path.join('a', 'b', '..', 'c/', './d'));
//  take path The pieces are connected 
//  Output ：a/c/d

path.resolve()

path.resolve() Method is used to convert a relative path to an absolute path .

/ As the root of the absolute path , encounter / Then go back to root directory resolution

It can accept multiple parameters , Indicate the path to enter in turn , Until the last parameter is converted to an absolute path . If the absolute path cannot be obtained according to the parameters , Take the current path as the benchmark . Except for the root directory , The return value of this method has no trailing slash

path.resolve(); //  The absolute path of the directory is returned by default , be equal to  __dirname 
path.resolve('/foo/bar', './baz')
// '/foo/bar/baz'

path.resolve('/foo/bar', '/tmp/file/')
// '/tmp/file'

The effect of execution is similar to cd operation

cd /foo/bar  ==> /foo/bar
cd ./baz     ==> /foo/bar
cd /tmp/file ==> /tmp/file