How to compile and run javascript in notepad

Notepad is a classic text editor that is very popular among developers due to its convenience and ease of use. JavaScript is a widely used programming language used to add dynamics and interactivity to web pages. Therefore, if you want to edit JavaScript code in Notepad, you need to know how to compile and run JavaScript. In this article, we will discuss in detail how to compile and run JavaScript code in Notepad.

Step One: Create JavaScript File
First, open the Notepad editor and type your JavaScript code in a new text file. Make sure your file extension is .js, which is the standard extension for JavaScript files. You can choose to append the .js extension to the file name, or select .js as the file type when saving the file.

For example, if you want to create a simple hello world program, the code looks like this:

console.log("Hello world");

Please note that the standard syntax supported by the Node.js runtime is used here. If you are using a browser or other JavaScript runtime, some adjustments may be required to ensure correct operation.

Step 2: Save the file
Before saving the file, please make sure there are no errors in your code. When saving the file, please note the following points:

1. Press Ctrl S to save the file, or select the "File" > "Save" option in the menu bar.
2. Set the file name to a name of your choice, then set the file type to "All Files" and add the ".js" extension after the file name.
3. Select the location where you wish to save the file and click the "Save" button.

Step Three: Run the JavaScript Code
Once you have created and saved the JavaScript file, it is time to run it. Here are the steps to run JavaScript code in Notepad:

1. Please note that there is no option to run JavaScript code directly in Notepad. Therefore, you need to install a Node.js or other runtime environment that supports JavaScript.
2. Open a command prompt window (Windows) or a terminal window (MacOS or Linux). Type "cmd" (for Windows users) or "terminal" (for MacOS or Linux users) into the system search bar and click Open.
3. In the command prompt or terminal window, navigate to the folder where you saved the JavaScript file. For example, if your file is in the "C:UsersYourNameDocumentsJavaScript" folder, type the following command in the command prompt:

cd C:UsersYourNameDocumentsJavaScript

Note that if you are using MacOS or Linux, the path The delimiter is "/" instead of Windows' "".

4. Make sure you have installed the Node.js runtime environment. In the command prompt or terminal window, type the following command to check the Node.js version:

node -v

If you have not installed Node.js, please download and install it from the node.js official website.

5. Now you can run your JavaScript code. In a command prompt or terminal window, type the following command:

node 文件名.js

Note that the filename should be replaced with the name of the JavaScript file you saved (don’t forget to add the extension “.js”). Then, press Enter to run the JavaScript program.

6. If your code has no errors, it will output the results in the command line interface. In our previous example, you should see the following output:

"Hello world"

Congratulations, you have successfully compiled and run your JavaScript code in Notepad!

Summary
Compiling and running JavaScript code in Notepad is very simple. Just follow the above steps and you can create dynamic and interactive code for your web pages. Please note that while Notepad is a convenient text editor, it is not a true development environment. If you plan to develop large web pages or complex applications, it is recommended to use a more powerful integrated development environment (IDE) tool.

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