汇总：如何在文件开头添加一行？

Question

I am using rollup to generate a single JavaScript file. I want to put a line at the beginning of this JavaScript file that looks like this:

This is a line of my choosing

I'd been googling for a while and can't figure out how to do this. I found a banner plug-in, but the problem is it puts a comment at the beginning of the line you prepend, and I don't want that. I found and insert plug-in, but that inserted the line on every file, and it did it inside the iife. I want this line only once at the beginning of the file and outside the IIFE.

How do you prepend a line to the beginning of your rollup output file?

Answer 1

desen't the 'output.banner' option itself work?

// rollup.config.js
export default {
  ...,
  output: {
    ...,
    banner: 'This is a line of my choosing',
  }
};