Displaying Author Name from Topic Properties

I hacked a thing together that will theoretically work.

1. In the master page, switch to code view.

2. Add the following to the head section:

<script>// wait for the dom to load
document.addEventListener("DOMContentLoaded", function() {
	// grab the content of the rh-authors meta tag (change the name of the tag if you want to grab the value
	//of a different meta tag
	let m = document.querySelector('meta[name="rh-authors"]').content;
	// stick it in the element with the id "author"
	document.getElementById("author").innerHTML = m;
} );
</script>

3. Where you want the author name to appear, insert:

<span id="author"></span>

Notes:

* Make sure the span is empty. We'll plug in the name using a script.

* You don't have to use a span tag. For example, you could just insert an empty p tag and give it the id="author" instead.  The script doesn't care what element you use, only what the id is. However, be aware the script will replace whatever content is inside that element, so you should make sure it's empty. 

In the output, the values from the meta tag should be written in by the script as the page is loaded. You will need to make sure an author is added for every topic, though.