Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
Node.js β util.types.isNativeError() Method
The util.types.isNativeError() method checks whether the passed value is a built-in error type or not. If the above condition is satisfied, it returns True, else False. The error can be of any type.
Syntax
util.types.isNativeError(value)
Parameters
It takes a single parameter −
value − This input value takes input for the required parameter and checks if it's an error type or not.
It returns True or False based upon the input value passed.
Example 1
Create a file with the name "isNativeError.js" and copy the following code snippet. After creating the file, use the command "node isNativeError.js" to run this code.
// util.types.isNativeError() Demo Example
// Importing the util module
const util = require('util');
// Passing a new error instance to the input param
console.log("1." + util.types.isNativeError(new Error()));
// Passing a TypeError to the input param
console.log("2." + util.types.isNativeError(new TypeError()));
// Passing a RangeError to the input param
console.log("3." + util.types.isNativeError(new RangeError()));Output
C:\home
ode>> node isNativeError.js 1.true 2.true 3.true
Example 2
Let’s have a look at one more example
// Importing the util & assert module
const util = require('util');
const assert = require('assert');
function fun() {
return new Error('Some Unknown Error occured')
}
function fun1() {
return (5/0); // Will return infinity
}
// Passing a new error returned from function
console.log("1." + util.types.isNativeError(fun()));
// Passing a mathmeatical error
console.log("2." + util.types.isNativeError(fun1()));
// Passing an AssertionError to the input param
console.log("3." + util.types.isNativeError(assert.AssertionError));Output
C:\home
ode>> node isNativeError.js 1.true 2.false 3.false
Updated on: 18-Aug-2021
71 Views
Advertisements