A bookmarklet that downloads group names and group members in a groupset on Canvas in csv format

canvas.group_members.js

var groups = [];
document.querySelectorAll("li.group").forEach(
	function(group) {
		name = group.querySelector("span.group-name").textContent;
		members = [];
		group.querySelectorAll("div.group-user-name").forEach(
			function(member) {
				members.push(member.textContent.trim() + "\t" + name);
			}
		);
		groups.push(members.join("\n"));
	}
);
groups = groups.join("\n").trim();

var filename = "groups.tsv";

if (groups.length >= 1) {

	var blob = new Blob([groups], {
		type: "text/csv;charset=utf-8;"
	});
	if (window.navigator.msSaveOrOpenBlob) {
		window.navigator.msSaveBlob(blob, filename);
	} else {
		var elem = window.document.createElement('a');
		elem.href = window.URL.createObjectURL(blob);
		elem.download = filename;
		document.body.appendChild(elem);
		elem.click();
		document.body.removeChild(elem);
		window.URL.revokeObjectURL(elem.href);
	}
}