babel:tldr:83740

The command babel ${path-to-input_file} --watch is used to transpile code written in ECMAScript 2015+ (ES6+) into backwards compatible versions of JavaScript.

Here is an explanation of each part of the command:

• babel: This is the command to invoke the Babel compiler. Babel is a popular JavaScript compiler that can transform modern JavaScript code into a version that can run on older browsers or environments that do not support the latest language features.
• ${path-to-input_file}: It represents the path to the input file that you want to transpile. Replace ${path-to-input_file} with the actual path to your input file.
• --watch: This flag instructs Babel to continuously monitor the files for changes. If any changes are detected, Babel will automatically transpile the modified file(s) again.

By running this command, Babel will transpile the provided input file and any subsequent changes made to it or its dependencies will be detected and transpiled automatically, ensuring that the output files are always up to date.