I assume you are using this split action. If so, you can just add a single line to assign the tag you want…like:
// Split at specified delimiter
var delim = “|”;
var text = draft.content;
var chunks = text.split(delim);
for (var chunk of chunks) {
var d = Draft.create();
d.content = chunk;
d.addTag("MY-TAG"); // NEW LINE!
d.update();
}
Naturally, you would need to change "MY-TAG"
to the value you want for the tag (still in quotes).