Photo by Boitumelo Phetla on Unsplash

JavaScript console is a command line interface that is used in your browser that executes snippets of code. It is highly useful in finding errors in your code in an attempt to debug them. I have used it plenty of times to test my code to see whether or not I was receiving the right data that I was calling within a fetch method to a specific API. It can also be used to view specific changes to variables, states, and messages to make sure your program is working as expected. Recently I have been using them in learning algorithms and data structures to make sure I am implementing the right code to get the desired end result. You can use them in numerous ways in the JavaScript console. Here are some ways you can use the console.

These are the directions to open the console depending on your browser.

Firefox: Menu Bar > Tools > Web Developer > Web Console

Chrome: Customize and Control Google Chrome > More Tools > Developer Tools

Safari: Safari Menu > Preferences > Advanced > Checkbox “Show Develop Menu” > Develop Menu > Show Error Console

It should look like so…

Now there are many different ways you can use the console. Mostly the ways that are extremely new to me because for the most part all I ever knew was “console.log()”.

  1. Console.log()

Outputs a message to the console…

2. Console.warn()

Outputs a warning message to the console…

3. Console.error()

Outputs an error message to the console…

4. Console.clear()

Clears the console…before…


5. Console.count()

Logs the number of times that this particular call to count() has been called…

6. Count.table()

Displays tabular data as a table…

7. Console.time() & Console.timeEnd()

Starts and stops a timer…

8. & Console.groupEnd()

Creates a new inline group in the console…

There are more console methods you can use these are just a few I thought were pretty cool. Below are my resources. Thank you for reading!!!!



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Johnnie Gonzalez

Johnnie Gonzalez

Software Engineering creative with background in architectural design. Love for sustainable design and tech!