The usual way to run a Node.js program is to run the globally available node command (once you install Node.js) and pass the name of the file you want to execute.
If your main Node.js application file is app.js, you can call it by typing:
Above, you are explicitly telling the shell to run your script with node. You can also embed this information into your JavaScript file with a "shebang" line. The "shebang" is the first line in the file, and tells the OS which interpreter to use for running the script. Below is the first line of JavaScript:
Above, we are explicitly giving the absolute path of interpreter. Not all operating systems have node in the bin folder, but all should have env. You can tell the OS to run env with node as parameter:
While running the command, make sure you are in the same directory which contains the app.js file.
Pass string as argument to node instead of file path
To execute a string as argument you can use -e, --eval "script". Evaluate the following argument as JavaScript. The modules which are predefined in the REPL can also be used in script.
On Windows, using cmd.exe a single quote will not work correctly because it only recognizes double " for quoting. In Powershell or Git bash, both ' and " are usable.
As of nodejs V16, there is a built-in option to automatically restart the application when a file changes. This is useful for development purposes.To use this feature, you need to pass the `--watch' flag to nodejs.
In Node. js, you can pass command line arguments to your script the same as you would for any other command line application. Simply type your arguments after the script path separated with a space as shown below: Copied!
Step 2: Open your terminal or command prompt. Step 3: Use the cd command to navigate to the directory where your JavaScript file is located. Step 4: Once you're in the correct directory, run the script using the node command followed by your script's filename.
using NPM run hello, followed by –name=”Jane” in the terminal, we have passed a single argument to the script script. js. The script then uses this argument to output a greeting message “Hello Jane !”. const nname = process.
Command-line arguments are handled by the main() function of a C program. To pass command-line arguments, we typically define main() with two arguments: the first argument is the number of command-line arguments and the second is a list of command-line arguments.
js project we should run npm init to create a new package. json file for our project. Create a new empty directory in your development environment and run npm init . You'll then answer a few basic questions about your project, and npm will create a new package.
It is a computer environment the same as command prompt and an easy way to test simple Node. js/JavaScript code and allows to execute multiple javascript codes. we can simply run REPL on the command prompt using node command on the command prompt.
To run a Bash script in Linux, you first need to make sure the script has executable permissions. You can do this by using the ` chmod +x` command followed by the script name. Once the script is executable, you can run it by typing ` ./` followed by the script name in the terminal.
Introduction: My name is Jonah Leffler, I am a determined, faithful, outstanding, inexpensive, cheerful, determined, smiling person who loves writing and wants to share my knowledge and understanding with you.
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