w3ps1/src/lib/helpers.js

export function rand(length) {
    let result = '';
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    const charactersLength = characters.length;
    let counter = 0;
    while (counter < length) {
    result += characters.charAt(Math.floor(Math.random() * charactersLength));
    counter += 1;
    }
    return result;
}

export function animateText (ev) {
    if (!ev.target.getAttribute('data-text')) {
        ev.target.setAttribute('data-text', ev.target.innerHTML)
    }
    if (ev.target.getAttribute('data-animate') === "1") {
        return;
    }
    ev.target.setAttribute('data-animate', "1")
    const orig = ev.target.getAttribute('data-text')
    const steps = orig.length

    const random = rand(orig.length)
    ev.target.innerHTML = random

    for (let i = 0; i <= steps; i++) {
        setTimeout(() => {
            ev.target.innerHTML = orig.substring(0, i) + rand(orig.length - i)

            if (i === steps) {
                ev.target.setAttribute('data-animate', "0")
            }
        }, 50*i)
    }
}