deprecated

What is deprecated?

The 'deprecated' npm package is used to mark methods or functions as deprecated. This is useful for developers to indicate that certain parts of their code should no longer be used and may be removed in future versions. It helps in maintaining and updating codebases by providing warnings when deprecated methods are used.

What are deprecated's main functionalities?

Deprecate a Function

This feature allows you to mark a function as deprecated. When the deprecated function is called, a warning message is displayed to inform the user that the function is deprecated and suggest an alternative.

const deprecated = require('deprecated');

function oldFunction() {
  console.log('This is an old function');
}

const newFunction = deprecated('oldFunction is deprecated, use newFunction instead.', oldFunction);

newFunction();

Deprecate a Method in an Object

This feature allows you to mark a method within an object as deprecated. Similar to the function deprecation, it provides a warning message when the deprecated method is called.

const deprecated = require('deprecated');

const myObject = {
  oldMethod: function() {
    console.log('This is an old method');
  }
};

myObject.newMethod = deprecated('oldMethod is deprecated, use newMethod instead.', myObject.oldMethod);

myObject.newMethod();

Other packages similar to deprecated

util-deprecate

The 'util-deprecate' package provides a similar functionality to 'deprecated' by allowing developers to mark functions as deprecated. It is a lightweight utility that provides a simple way to issue deprecation warnings. Compared to 'deprecated', 'util-deprecate' is more focused on simplicity and ease of use.

depd

The 'depd' package is another alternative for deprecating functions and methods. It provides a more advanced and flexible way to handle deprecations, including the ability to track deprecation warnings and customize the warning messages. 'depd' offers more features and customization options compared to 'deprecated'.

README

deprecated

Information

Package	deprecated
Description	Tool for deprecating things
Node Version	>= 0.9

Usage

var oldfn = function(a,b) {
  return a+b;
};

// returns a new wrapper function that logs the deprecated function once
var somefn = deprecated('dont use this anymore', console.log, oldfn);

var someobj = {};

// set up a getter/set for field that logs deprecated message once
deprecated('dont use this anymore', console.log, someobj, 'a', 123);

console.log(someobj.a); // 123