Calculating the approximate height of text

textHeight.js

import stringPixelWidth from "string-pixel-width";

export function getTextHeight(text, { textBlockWidth, lineHeight = 1.15, fontSize }) {
  const paragraphs = text.split('\n');
  const lineCountPerParagraph = paragraphs.map(paragraph => {
    const words = paragraph.split(' ');
    const [lineCount] = words.reduce(([lines, line], word, idx) => {
        const expandedLine = line ? line + ` ${word}` : word;
        if (stringPixelWidth(expandedLine, {size: fontSize}) < textBlockWidth) {
            return [lines, expandedLine]
        }
        return [lines + 1, word]
    }, [1, '']);
    return lineCount;
  });
  const totalLineCount = lineCountPerParagraph.reduce((countA, countB) => countA + countB);
  return totalLineCount * fontSize * lineHeight
}