1.4 – Browser Console & prompt() in JavaScript | undefined Introduction | JavaScript – New Series скачать в хорошем качестве

1.4 – Browser Console & prompt() in JavaScript | undefined Introduction | JavaScript – New Series

Welcome to the JavaScript for MERN Developers – Job-Ready Series (New Series) by Burle Sharma. In this class (1.4), we learn how to use the browser console to write and execute JavaScript code. The class begins by showing how to open the Console using Inspect in Google Chrome, and it is clearly mentioned that any modern browser can be used for the same purpose. Basic JavaScript statements such as console.log() and variable declaration using var are executed directly in the browser console. While doing this, the console automatically displays undefined, and it is mentioned that undefined is a data type, which will be discussed in detail in upcoming classes. The session then demonstrates the use of prompt() in the browser console, both without a message and with a message. When prompt() is executed in the browser, a separate dialog box appears with a text box and two buttons: OK and Cancel. The working of prompt() is clearly explained so that beginners understand how user input is captured. Towards the end, an important difference is discussed between using the browser console and an online compiler. It is explained that the browser console executes one statement at a time, whereas an online compiler can execute multiple lines of code together. Beginners are advised to use both approaches and perform experiments with the concepts learned so far. It is also clearly mentioned that the reason behind getting 5070 instead of 120 will be explained in the next class. 🎓 What you’ll learn in this video: How to open the JavaScript console in a browser Using Inspect option in Chrome (and other browsers) Executing JavaScript code in the browser console Using console.log() in the console Declaring variables in the console Understanding why undefined appears Using prompt() with and without a message How user input dialog works in the browser Difference between browser console and online compiler 🧠 Key Learning Point: The browser console is useful for quick testing and experiments, while an online compiler is better for writing and executing complete programs. Understanding both helps beginners gain confidence in JavaScript. #JavaScript #JavaScriptBeginners #JavaScriptNewSeries #BrowserConsole #PromptInJavaScript #UndefinedInJavaScript #LearnJavaScript #MERNStack #BurleSharma #GeeCoding