The Complete JavaScript Course - Beginner to Advance in English > Promise in Javascript

Error handling with promises

14.4k

Start a new search

To find content from modules and lessons

Error handling in JavaScript deals with runtime errors. The try keyword is used to create the try block. Under this block, the code that potentially trigger an exception is wrapped. The keyword catch creates the catch block.

When you wish to return a rejected promise (one that will leap to the next), use reject or throw. catch()). @maxwell - I appreciate your example. At the same time, if you add a catch to the fetch and throw the exception in it, you will be safe to use try.

I've lately spent a lot of time on Node and have run into three reoccurring promises issues: Promises offer an API that encourages writing risky code on the side. Promises lack a user-friendly API for working with data safely. Promises co-mingle rejected promises and unintended runtime exceptions.

Error handling is the process of anticipating, detecting, and resolving mistakes in programming, applications, and communications. For some applications, specialized programs known as error handlers are provided.

Learner's Ratings

4.9

Overall Rating

Reviews

Mohammad Suhail

Good trainer

Prabhat Yadav

Superb and amazing 😍🤩 enjoyable experience.

karthikeyan Karthik

Thankyou learnvern....

William Jimmy

This is by far the most comprehensive tutorial I ever come across. I was really excited to discover this amazing tutorial, but unfortunately couldn't continue due to keypad noise which I'm allergic to

Vijay Banjara

Amazing

VAISHNAVI RAJESH CHALKE

it helps me to clear my basic conceptual knowledge

Takhmina

Thank you! I enjoyed the course; I learned so much.

Anuj singh

great course for javascript

Stephen Kinuthia

perfect javascript journey

Abhishek Kumar

Great course for Javascript

Error handling with promises

Start a new search

What is error handling in JavaScript?

How do I return a Promise error?

What is the problem with the Promise in JavaScript?

What is the error handling?

Learner's Ratings

Reviews

Mohammad Suhail

Prabhat Yadav

karthikeyan Karthik

William Jimmy

Vijay Banjara

VAISHNAVI RAJESH CHALKE

Takhmina

Anuj singh

Stephen Kinuthia

Abhishek Kumar

Course Content

Introduction to Javascript

How to use LearnVern

Javascript Features

Ways to write and Add Javascript code

Comments in Javascript

Assignment : Introduction to JavaScript

JavaScript Variables

JavaScript Global Variable

Primitive Data Types in JavaScript

JavaScript - Non Primitive Datatypes

JavaScript arithmetic operators

JavaScript Comparison Operators

JavaScript Bitwise

Javascript Logical Operator

Javascript Assignment Operator

Special JavaScript Operators

JavaScript if/else Statement

JavaScript switch Statement

JavaScript do/while Statement

JavaScript for/in Statement

JavaScript Functions

JavaScript Function call()

JavaScript bind () vs apply () and call ()

Assignment : JavaScript Basics 1

Assignment : JavaScript Basics 2

Javascript Objects

JavaScript object methods part -1

JavaScript object methods part -2

JavaScript Arrays

JavaScript Arrays methods part 1

JavaScript Arrays methods part 2

JavaScript Arrays methods part 3

JavaScript Arrays method part 4

JavaScript Arrays methods part 5

JavaScript Arrays methods part 6

JavaScript string

JavaScript string methods part 1

JavaScript string methods part 2

JavaScript Date objects part 1

Java script Date objects part 2

JavaScript math object part 1

JavaScript math object part 2

JavaScript Numbers and Number Constants

JavaScript Number Methods

Assignment : JavaScript objects

Java script window- The Browser Object Model

Java script BOM- Window Object

Javascript BOM - History Object

Javascript BOM - Navigator object

Javascript BOM - Screen Object

Assignment : Browser Object Model

Javascript Document Object Model - DOM

Javascript Document Object Methods

Assignment : Document Object Model

Javascript Form Validations

Javascript Email Validations

Assignment : Javascript Validation

Java Script Classes

Java Script Prototypes

Java Script Constructors

Java Script Static Methods