visual studio code javascript console output

#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT HOW TO#
#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT INSTALL#
#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT CODE#

This way, we can safely get the value of id without changing the value of places.length. To fix this, simply replace the line with: const id = places. The problem is caused by the ++ operator which is mutating the array’s length. Click Step over to execute the current line.Īha! The value of places.length just incremented by 1, yet we haven’t added anything to the array. The value of places.length is still zero. The debugger will navigate you to places.js. Restart the debugging session, and this time use Step into to navigate to the addPlace function. If you hit Step over, places.length reads 2, yet only one place has been added. Hit the Play button to start the debugging session.Īt the start of the test, places.length should read zero. Make sure to add a places.length expression in the watch section. That should be line seven, where it says: addPlace ( 'Nairobi', 'Kenya' ) Go back to placesTest.js and add a breakpoint on the line just before where the first test failure occurs. You’ll need to comment out the last three lines you added in places.js otherwise the tests won’t run as expected. Go back to the dropdown and select Mocha Tests. Places, addPlace : ( city, country ) => ,

#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT CODE#

You’ll need to open the debug-project folder in VS Code ( File > Open Folder) and select the file from within the editor. The first file I’d like you to look at is src/places.js. Once we’re finished, you’ll never want to use a console.log() again.

#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT HOW TO#

We’ll also look at how to use the Debugger for Chrome extension that allows VS Code to integrate with Chrome Dev Tools. In this this article, we’ll look at how to use the debugging facilities provided by Visual Studio Code. In fact, every major browser provides its own tools. There are a number of tools available for debugging JavaScript code, such as the Chrome Dev Tools, Node Debugger, Node Inspect and others. To remedy this, we need to change our habits and start using debugging tools. Often you’ll find yourself laying down console.log traps all over your code to see which one will reveal the culprit. However, things can get finicky at times if you don’t know where and what is causing the bug. For a long time, most developers, including myself, have been using console.log to debug broken code.

The answer lies in using debugging tools. I’m pretty sure the first question you’d ask yourself would be “How am I ever going to confirm my code is working correctly?” Imagine for a moment that the console.log() function did not exist in JavaScript.

This article covers two tools that will help you debug JavaScript like a pro. Select Generate launch.json, which is basically like a configuration file for the debugger.Debugging JavaScript isn’t the most fun aspect of JavaScript programming, but it’s a vital skill. Next, we need to tell vs code to use this server. That’s it, you have your own live server on localhost:8080.

#VISUAL STUDIO CODE JAVASCRIPT CONSOLE OUTPUT INSTALL#

Install it by typing the following in the terminal: npm i reload -gĪfter installing, run this in the command line: reload For this, we’ll use an NPM package called reload. But, we can use hot reload using a live server.

If you notice, the URL opens the file on our computer. Until then, don’t worry, I have a solution. However, the VS Code team has the auto-reload feature on the roadmap and I’m pretty sure we can see it in a few months. This is a completely new feature, so we must be patient since it won’t have all the bells and whistles. So if you zoom in the external window, the vs code window will also zoom in. This is because the window we see in vs code as the browser is like a screencast of the external window. You might have noticed a browser window being opened, you can minimise it but it is essential to leave it open otherwise the dev tools won’t work.

Visual studio code javascript console output