Node.js file copying, folder creation and other related operations

NodeJS copies the files:

Generally, the copy operation of small files uses the stream pipeline transport operation.

First you need to load the imported file: var fs = require('fs');

1. Create folders synchronously

fs.mkdirSync(yourfileDirPath);

Create folder asynchronously

fs.mkdir(yourfileDirPath);

2. Determine whether the folder exists - Synchronize

fs.existsSync(dirpath);

asynchronous

fs.exists(dirpath);

Using the above related operations, we can directly write a method to determine the creation of a folder.

function mkdir(dirpath,dirname) {
  //Judge whether the second parameter is normal to avoid passing in wrong parameters when calling if (dirname !== path.dirname(dirpath)) {
   mkdir(dirpath);
   return;
  }
  if (fs.existsSync(dirname)) {
   fs.mkdirSync(dirpath)
  } else {
   mkdir(dirname, path.dirname(dirname));
   fs.mkdirSync(dirpath);
  }
}

Pay attention to synchronous and asynchronous creation, reading and other issues, otherwise the folder will not exist when copied. It is recommended to use synchronous creation Sync method, which is generally in the form of fs.xxxSync.

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