Скачать или смотреть How to Access a Class Method in JavaScript from the Browser Console

Learn how to easily access class methods in JavaScript from the browser's console with this simple guide.
---
This video is based on the question https://stackoverflow.com/q/68184070/ asked by the user 'Akos' ( https://stackoverflow.com/u/12771917/ ) and on the answer https://stackoverflow.com/a/68184221/ provided by the user 'Jirka Svoboda' ( https://stackoverflow.com/u/4610318/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How to call or access a class method in JavaScript from the browser's console?

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Access a Class Method in JavaScript from the Browser Console: A Step-by-Step Guide

If you're diving into the world of JavaScript, you may occasionally encounter issues when trying to access class methods, especially when using modules. This common challenge can be quite confusing for beginners. In this post, we will walk you through a real-world example of how to access a class method from the browser's console, breaking it down step-by-step.

The Problem

You are working with two JavaScript files: guitars.js and script.js. The guitar.js file defines a class named Guitars, which includes a method to change the guitar's details. After creating an instance of this class in script.js, you want to access the changeDetails() method from the browser's console.

Here’s the code snippet from your guitars.js file:

[[See Video to Reveal this Text or Code Snippet]]

And the instance of the class is created in script.js as follows:

[[See Video to Reveal this Text or Code Snippet]]

While everything works smoothly when the code is in a single file, you find it challenging to access the changeDetails() method after splitting the files into modules.

The Solution

To access the changeDetails() method from the console, you can use a simple approach: store the instance of your class in a global variable. Here's how you can do it:

Step 1: Modify the script.js File

Add the following line at the end of your script.js file:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Access the Method from the Console

After adding the above line, you can open your browser console (usually by right-clicking on the page and selecting "Inspect" or "Inspect Element" and then navigating to the "Console" tab), and execute the method like this:

[[See Video to Reveal this Text or Code Snippet]]

Important Note

While this method effectively allows access to your class instance and its methods, it's important to note that using global variables is not a best practice for production code. It's fine for debugging or experimental purposes but should be avoided in a live environment.

Conclusion

Accessing class methods from the browser console can initially seem daunting, especially when using module exports. However, by storing your class instance in a global variable, you can easily access its methods for testing or debugging. Just remember to keep this practice to a minimum and prioritize encapsulation in your JavaScript files when moving to production.

Now you should have a clearer understanding of how to manage class methods across different modules in JavaScript! Happy coding!