estimated-reading-time/dist/esm/estimated-reading-time.js

Calculate the estimated reading time of a given text (plain text or HTML)

import { wordCountHtml } from './word-count.js';
import { TextFormat } from './text-format.js';
import { wordCountPlainText } from './word-count.js';
const WORDS_MINUTE = 250;
const WORDS_MINUTE_TECHNICAL = 150;
export function estimatedReadingTime(text, textFormat, options) {
    switch (textFormat) {
        case TextFormat.HTML:
            return estimatedReadingTimeHtml(text, options);
        case TextFormat.PLAIN_TEXT:
        default:
            return estimatedReadingTimePlainText(text, options);
    }
}
function estimatedReadingTimePlainText(text, options) {
    const numWords = wordCountPlainText(text);
    return calcEstimatedReadingTimeFromWords(numWords, options);
}
function estimatedReadingTimeHtml(html, options) {
    const numWords = wordCountHtml(html);
    return calcEstimatedReadingTimeFromWords(numWords, options);
}
function calcEstimatedReadingTimeFromWords(numWords, options) {
    const wordsPerMinute = options && options.isTechnical ? WORDS_MINUTE_TECHNICAL : WORDS_MINUTE;
    const readingTime = numWords / (options && options.wordsPerMinute ? options.wordsPerMinute : wordsPerMinute);
    const minutes = readingTime | 0; // truncate decimal part of the number
    const seconds = Math.ceil(Number.parseFloat(((readingTime - minutes) * 60).toFixed(2)));
    let roundedMinutes = seconds >= 30 ? minutes + 1 : minutes;
    const res = { numWords, minutes, seconds, roundedMinutes };
    return res;
}