depd 2.0.0

Depd, also known as "deprecate all the things", is a library in Node.js to assist in marking modules or parts of a codebase as deprecated. It helps in alerting application users or developers of deprecated functionalities in a codebase in a granular and informative manner. The deprecation warnings from this module also include the file and line information for the call into the module where the deprecated function was invoked.

To utilize depd in your application, you firstly need to install it using npm. Running npm install depd in the terminal will install the depd library. After installation, you can require it in your JavaScript files. Create a new deprecate function that uses a unique namespace name in the messages. It is advised to use the name of your module as the namespace. The usage might look as follows:

const deprecate = require('depd')('my-module');

Depd can be used in a number of ways such as deprecating function calls, access to object properties, and more. For example, to deprecate a function call with depd:

const deprecate = require('depd')('my-module');

exports.myFunction = deprecate.function(() => {
  // function logic here..
}, 'myFunction is deprecated');

In the example above, all calls to myFunction will display the 'myFunction is deprecated' message. Keep in mind that each file should create its new deprecate object.

The depd documentation can be found directly in the readme file on the GitHub repository. The readme file comprehensively goes through various ways to leverage depd such as creating a deprecation object, deprecating function calls, deprecating property access, controlling deprecation messages and capturing deprecation errors among other functionalities.