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HTML

              
                <button class="dalga">DALGA EFEKTi</button>
<a href="#" class="dalga">DALGA EFEKTİ</a>
              
            
!

CSS

              
                body{height:100vh;display:flex;justify-content:space-around;align-items:center;background:#a2214d;margin:0;}
@media(max-width:576px){
  body{flex-direction:column}
}

/* Butonlar */
.dalga{color: #fff;font-family: 'Roboto', sans-serif;border: 1px solid #333;background-color: #333;cursor:pointer;font-size: 14px;padding: 20px 30px;line-height:17px;text-decoration:none;position: relative;overflow: hidden;}
.dalga .daire {position: absolute;border-radius: 50%;background-color: #fff;width: 100px;height: 100px;transform: translate(-50%, -50%) scale(0);animation: buyut 0.6s ease-out;}

@keyframes buyut {
    to {
        transform: translate(-50%, -50%) scale(4);opacity: 0;
    }
}
              
            
!

JS

              
                const dalga = document.querySelectorAll('.dalga'); // dalga classına sahip tüm elemenlter

dalga.forEach(d => { //dalga classına sahip elementelerin hepsine uygulanacak şekilde döngü
	d.addEventListener('click', function(e) { // tıklama eventi
        // 1
		let x = e.clientX; // Yatay koordinatı alın
		let y = e.clientY; // Dikey koordinatı alın

        // 2
		let ustDalga = e.target.offsetTop; // Yukarıdan uzaklığı
		let solDalga = e.target.offsetLeft; // Soldan uzaklığı

        // 3
		let xInside = x - solDalga; // İçeriden koordinat hesaplaması
		let yInside = y - ustDalga; // İçeriden koordinat hesaplaması

        let daire = document.createElement('span'); // span oluştur
        daire.classList.add('daire'); // daire classını spana ata
        daire.style.top = yInside + 'px'; // yukarıdan seçtiğimiz kadar boşluk
        daire.style.left = xInside + 'px'; // soldan seçtiğimiz kadar boşluk

        this.appendChild(daire); // dalga class elementinin içerisine yerleştir

        setTimeout(() => {
            daire.remove();
        }, 600); // 600 ms süre sonra eklenen daire spanını kaldır
	});
});
              
            
!
999px

Console