JavaScript Error Handling

Objective

In this exercise, we will be practicing error handling in JavaScript by implementing selective catching, strict mode and try/catch/finally blocks.

Steps

Getting Started

Exercise Repo: JS Error Handling

1. Open your command line and navigate to your repos directory (if you do not have a repos folder, then you can use mkdir repos to create one)
2. Use this template repository to start a new project in your repos folder: git clone <repo_link>
3. cd repo_name to navigate into your new repo directory
4. Start Visual Studio Code and select 'Open Folder'. Then select repo_name to open the folder in the editor (or just type code . in your terminal inside the repo directory)
5. Follow the instructions on the README.md file to complete exercises
6. Open the app.js file to get started

Exercise 1: Enable Strict Mode

Complete the following in your app.js file

1. Enable JavaScript's "Strict Mode" for the file

Exercise 2: Function Syntax Debugging

Complete the following in your app.js file

1. There is a problem with the function syntax. Fix the issue before you finish.

HINT: The issue will cause data to be read as null.

Exercise 3: Using Try/Catch

Complete the following in your app.js file

1. Add a try/catch block in the function body
2. Try to return the data parsed to JSON
3. Catch any raised exceptions
4. If an exception is caught:
   1. Print the error to the console
   2. Return null

On Complete

When you are finished, your console should resemble the following:

null
{ success: true }