@mikhail2404/react-ts-typewriter/dist/Typewriter.js

React typewriter component written in TypeScript with React 18

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
import React, { useState, useEffect } from 'react';
import styles from './Typewriter.module.css';
const DEFAULT_MS = 30;
export default function Typewriter({ text, speed = DEFAULT_MS, loop = false, newLine = false, random = DEFAULT_MS, delay = DEFAULT_MS, cursor = true, onFinished = () => {
}, onStart = () => {
} }) {
    const [currentStringIndex, setCurrentStringIndex] = useState(0);
    const [currentTextIndex, setCurrentTextIndex] = useState(0);
    const [lines, setLines] = useState([text[0]]);
    if (!Array.isArray(text))
        text = [text];
    useEffect(() => {
        setTimeout(() => __awaiter(this, void 0, void 0, function* () {
            if (currentTextIndex === 0)
                onStart();
            if (currentTextIndex < text[currentStringIndex].length) {
                setCurrentTextIndex(currentTextIndex + 1);
            }
            else {
                if (currentStringIndex < text.length - 1) {
                    yield nextLine();
                }
                else {
                    if (loop) {
                        setTimeout(() => {
                            setCurrentTextIndex(0);
                            setCurrentStringIndex(0);
                            setLines([text[0]]);
                        }, delay);
                    }
                    else {
                        onFinished();
                    }
                }
            }
        }), speed + (Math.random() * random));
    });
    const waitForDelay = (milisec) => {
        return new Promise(resolve => {
            setTimeout(() => {
                resolve('');
            }, milisec);
        });
    };
    const typeWrite = (str) => __awaiter(this, void 0, void 0, function* () {
        for (let i = 0; i < str.length; i++) {
            yield waitForDelay(speed + (Math.random() * random));
            setCurrentTextIndex(i);
        }
    });
    const nextLine = () => __awaiter(this, void 0, void 0, function* () {
        yield waitForDelay(delay);
        setCurrentTextIndex(0);
        setCurrentStringIndex(currentStringIndex + 1);
        setLines(lines => [...lines, text[currentStringIndex + 1]]);
    });
    if (Array.isArray(text) && newLine && delay) {
        return (React.createElement(React.Fragment, null,
            lines.map((line, index) => (React.createElement("span", { key: index },
                line === text[currentStringIndex] ? line.substring(0, currentTextIndex) : line,
                currentStringIndex !== index && React.createElement("br", null)))),
            React.createElement("span", { className: styles.cursor }, cursor && '▎')));
    }
    return (React.createElement("span", null,
        text[currentStringIndex].substring(0, currentTextIndex),
        React.createElement("span", { className: styles.cursor }, cursor && '▎')));
}