Output URLSearchParams ĪLSO READ: Check if key exists in object in JS 4. For example, we can use the object to dissect category and author searches as key-value pairs.Ĭonst search = new URLSearchParams(url.search) The URLSearchParams object reads and writes to a URL's query. The URL object created href before grouping its parts according to WHATWG URL standards. Input const url = new URL('category/nodejs/', '') We can use the object to create a new URL by appending an input 'category/nodejs/' to a base value ''.
The object creates a new URL that follows the WHATWG URL stands. Similarly, we can generate a binary data stream of a predetermined length while ignoring the new keyword. Input // Generate a stream of binary data from the "HI" string. The Buffer class represents binary data as a sequence of bytes.įor example, we can convert a string into a binary data stream by generating an object from the string. _dirname helps you get the path of the current working directory.ĪLSO READ: Create Map function for objects (instead of arrays) - Nodejs map 1.
NODE FILE MONITOR FULL
_filename is the full path of the current module from the root folder. Module is the file you are (currently) editing. tells Node to check the module in the current working directory.
Require caches the imported modules such that it won't reimport a module if you accidentally do so. Require imports another module's content into the current one. You attach file contents to the exports object before exporting them to another file.Ĭonst calculateArea = (length, width) => length * width The IIFE has five arguments: exports, require, module, _filename, and _dirname.Įxports is a mutable object. js files with an immediately invoked function expression (IIFE). If it fails to trace the module after inspecting the three levels, it throws an error.ĪLSO READ: Check if file or directory exists in Node.js Otherwise, it looks for the module inside node_modules. If it is not, it checks for the files inside the built-in modules. On requiring a module, Nodejs checks if it is a custom file.
Lastly, built-in modules come with Nodejs.
NODE FILE MONITOR INSTALL
Third-party modules are those you install and manage with NPM.
NODE FILE MONITOR CODE
It can use other files' contents by importing their code implementations. The script file you are currently modifying is a module. Nodejs classifies modules into three primary levels: script file, third-party or built-in modules. js file like index.js, main.js, or script.js is a module in Nodejs. The most straightforward definition of a module is that a module is a file. Understand modules before using Node.js global objects Definition of a module Before diving into some of the objects, it would be best to understand the ins and outs of Nodejs modules. Node.js global objects are JavaScript objects available in all modules.
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