How to make a line break without resorting to a tag?

Question

JavaScript

If you pass a tag, then the arrow parser transforms < and > As a consequence, it is displayed in the text.
How to make a line break in the text without using a tag, but with javascript available?
Of course, I can calculate the length of each substring, teach the element access to all lines, "cut" in the right places and substitute a tag there, but there may be another solution.

Answer 1

You can insert into the text:
But in fact it is no different from:
<br />

Answer 2

CSS: white-space: pre-wrap

Answer 3

nl2br(js)