Node.js fsPromises.mkdtemp() Method
Last Updated :
08 Oct, 2021
The fsPromises.mkdtemp() method is an inbuilt method which creates a unique temporary directory and resolves the Promise with the created directory path.
Syntax:
fs.Promises.mkdtemp( prefix, options )
Parameters: The method accepts two parameters as mentioned above and described below:
- prefix: It is a string that denotes the path of the file.
- options: It is a string or an object.
- encoding: It is a string and by default it’s value is utf8.
Return Value: It returns the Promise object which represents the eventual completion (or failure) of an asynchronous operation, and its resulting value.
Example: A temporary directory can be created with the following code:
const fs = require( "fs" );
const fsPromises = fs.promises;
const prefix = "temp" ;
fsPromises.mkdtemp(prefix,{ encoding: "utf8" })
.then((folder)=>{
console.log( "Temp folder created " , folder)
})
. catch ((err)=>{
console.log(err)
});
);
|
Output:
Temp folder created tempoe5zc9
A unique directory name is generated by appending six random characters to the end of the provided prefix. Due to platform inconsistencies, avoid trailing X characters in prefix. Some platforms, notably the BSDs, can return more than six random characters, and replace trailing X characters in prefix with random characters.
The optional options argument can be a string specifying an encoding, or an object with an encoding property specifying the character encoding to use.
fsPromises.mkdtemp(path.join(os.tmpdir(), 'foo-'))
.catch(console.error);
The fsPromises.mkdtemp() method will append the six randomly selected characters directly to the prefix string. For instance, given a directory /tmp, if the intention is to create a temporary directory within /tmp, the prefix must end with a trailing platform-specific path separator (require(‘path’).sep).
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