How to calculate the height of the occupied text without rendering?

Question

JavaScript

There is a block of a certain width. It is necessary to change its height depending on the occupied text. Everything is generated in a file. We know the font size and indents.
What am I doing:

var set_width = 20;
var font_size = 11;
var count_symbol = text.length;
var count_line = Math.round((count_symbol)/set_width )+1;
var set_height = (font_size *count_line)+((font_size /2)*count_line);

Answer 1

nodejs?

Answer 2

Действительно, причём здесь node.js? Какая ещё высота в консольной программе?