fs. Path module

When using relative paths to read or write files ,node In execution js The file will automatically be node Splicing the current running path of the command with the relative path of reading or writing will lead to reading or writing failure. At this time, it is necessary __dirname To splice paths ,__dirname Represents the absolute path of the current file ,

When using path splicing, if the path contains ./ Then that point will also be node Identifying as a path execution will lead to read or write failure , So we need to use path.join(__dirname,’./ route ’) To splice paths , This method will automatically ignore ./ or …/ In the point , If it is …/ Will automatically offset the previous layer of path, such as path.join(__dirname,’/a’,’/b/c’,’…/d’,’/e’), This path will eventually be spliced into ’\a\b\d\e’

path.basename(‘ Spliced path ’,‘ Suffix to delete ’)
As shown in the figure below ：

Get the suffix of the file