counter javascript

//---------------- COUNTER LOGIC----------------------
function runAnimtion() {
    anime({
        targets: '.counter-1',
        textContent: [0, 42],
        round: 1,
        easing: 'linear',
        duration: 1000
    });
}

const observer = new IntersectionObserver(
    entries => {
        entries.forEach(entry => {
            if (entry.intersectionRatio >= 0.7) {
                runAnimtion();
                observer.disconnect();
            }
        });
    }, {
        threshold: 0.7
    }
);

observer.observe(document.querySelector('.target-section'));