Instructions for using the fs.mkdir method in node.js_node.js

Method description:

Create file directories asynchronously. If the directory already exists, an exception will be thrown.

Grammar:

Copy code The code is as follows:

fs.mkdir(path, [mode], [callback(err)])

Since this method belongs to the fs module, the fs module needs to be introduced before use (var fs= require(“fs”) )

Receive parameters:

path The directory path to be created

mode Directory permissions (read and write permissions), default 0777

callback callback, passing the exception parameter err

Example:

Copy code The code is as follows:

var fs = require('fs');
fs.mkdir('creatdir', 0777, function(err){
if(err){
console.log(err);
}else{
console.log("creat done!");
}
})

Source code:

Copy code The code is as follows:

fs.mkdir = function(path, mode, callback) {
if (util.isFunction(mode)) callback = mode;
callback = makeCallback(callback);
if (!nullCheck(path, callback)) return;
binding.mkdir(pathModule._makeLong(path),
                  modeNum(mode, 511 /*=0777*/),
                  callback);
};