ncc:tldr:7c7e0

The command "ncc build --watch ${filename-js}" is used to compile and watch for changes in a JavaScript file using the ncc (Node.js Compiler Collection) tool.

Here's a breakdown of the command components:

• "ncc" is the command to execute the ncc tool. ncc is a tool that allows you to compile Node.js projects into a single file along with its dependencies.
• "build" is a subcommand of ncc used to compile the code.
• "--watch" is an option that instructs ncc to monitor the file for changes and recompile it automatically whenever modifications occur.
• "${filename-js}" is a placeholder that represents the actual name of the JavaScript file you want to compile and watch. The "${...}" syntax is typically used for variable interpolation or substitutions, so you would replace "${filename-js}" with the actual name of your JavaScript file, ensuring that it has the ".js" extension.

To run this command, you need to have ncc installed on your system and navigate to the directory where your JavaScript file is located. Then replace "${filename-js}" with the actual name of your JavaScript file, and execute the command in your terminal or command prompt.