In JavaScript, you can create multi-line comments using the /* and */ delimiters. Everything between these delimiters, regardless of line breaks, is treated as a comment and will not be executed.

/*
  This is a multi-line comment
  It can span multiple lines
  All text between /* and */ is ignored by the JavaScript interpreter
*/

let x = 5;

/*
  Multi-line comments are often used for larger blocks of explanations,
  documentation, or temporarily excluding multiple lines of code.
*/

In the example above, the content between /* and */ is a multi-line comment. It can span multiple lines, and the JavaScript interpreter will ignore all the text.