The process.noDeprecation property is an inbuilt application programming interface of the process module which is used to indicates whether the --no-deprecation flag is set on the current Node.js process. A Boolean that controls whether or not deprecation warnings are printed to stderr. Setting this to true will silence deprecation warnings. This property is used instead of the --no-deprecation command line flag.
Syntax:
process.noDeprecation
Return Value: This property indicates whether the --no-deprecation flag is set on the current Node.js process.
Below examples illustrate the use of process.noDeprecation property in Node.js:
Example 1:
// Node.js program to demonstrate the
// process.noDeprecation Property
// Include process module
const process = require('process');
// Printing process.noDeprecation property value
console.log(process.noDeprecation);
Command to run: node --no-deprecation hello.js
Output:
true
Command to run:node hello.js
Output:
undefined
Example 2:
// Node.js program to demonstrate the
// process.noDeprecation Property
// Include process module
const process = require('process');
// Instance Properties
process.noDeprecation = false;
// Printing process.noDeprecation property value
console.log(process.noDeprecation);
// Instance Properties
process.noDeprecation = true;
// Printing process.noDeprecation property value
console.log(process.noDeprecation);
Command to run: node --no-deprecation hello.js
Output:
true true
Command to run:node hello.js
Output:
false true
Reference: https://nodejs.org/api/process.html#process_process_nodeprecation
