The Modern JavaScript Bootcamp (2019) - Debugging Our Applications

The video tutorial covers debugging in JavaScript, focusing on identifying and fixing bugs using console.log and the debugger statement. It explains how to use the debugger to pause code execution, explore variables, and analyze data. The tutorial includes a practical challenge to reinforce learning and emphasizes the importance of debugging skills in programming.

What is the primary purpose of debugging in JavaScript?

• To add new features to the code

• To remove errors and ensure the code works as expected

• To optimize the code for performance

• To convert code into a different programming language

Why might console.log be insufficient for debugging complex issues?

• It only works in specific browsers

• It does not allow pausing code execution

• It requires manual insertion and removal of logs

• It can only display text messages

What is the advantage of using the debugger statement over console.log?

• It generates a report of all errors

• It allows code execution to pause and examine variable states

• It automatically fixes bugs

• It provides syntax highlighting

How can you continue code execution after pausing with a debugger?

• By removing the debugger statement

• By clicking the Play button in the debugger tools

• By closing the browser

• By refreshing the page

What happens if the DevTools are closed while a debugger statement is present?

• The debugger statement will be ignored

• The code will execute without pausing

• The code will not execute

• The browser will crash

In the practical challenge, what is the task when using the debugger in the filter callback function?

• To delete todos

• To explore and print todo data for each execution

• To change the todo text

• To add new todos

What is a key benefit of gaining experience in debugging?

• It allows for automatic code updates

• It makes fixing code faster and more efficient

• It reduces the need for testing

• It eliminates all future bugs