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updateContent

Smoothly updates the content of an HTML element with an erase and write effect.

Este script no debería instalarse directamente. Es una biblioteca que utilizan otros scripts mediante la meta-directiva de inclusión // @require https://update.greasyfork.org/scripts/480392/1283450/updateContent.js 

// ==UserScript==
// @name         updateContent
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  Smoothly updates the content of an HTML element with an erase and write effect.
// @author       IgnaV
// @grant        none
// ==/UserScript==

const updateContent = (element, newContent, forceUpdate = false, totalTime = 2000) => {
    const currentContent = element.innerText;
    if (forceUpdate || currentContent !== newContent) {
        const intervalTime = totalTime / (currentContent.length + newContent.length);
        let i = currentContent.length - 1;
        const eraseInterval = setInterval(() => {
            element.innerText = currentContent.substring(0, i--);
            if (i < 0) {
                clearInterval(eraseInterval);
                let j = 0;
                const writeInterval = setInterval(() => {
                    element.innerText = newContent.substring(0, ++j);
                    if (j === newContent.length) {
                        clearInterval(writeInterval);
                    }
                }, intervalTime);
            }
        }, intervalTime);
    }
};