Эффект размытия JavaScript
document.getElementById("idName").style.filter = "blur(10px)";
ayaan
document.getElementById("idName").style.filter = "blur(10px)";var form = document.getElementById("form");
form.addEventListener("focus", function( event ) {
event.target.style.background = "pink";
}, true);
form.addEventListener("blur", function( event ) {
event.target.style.background = "green";
}, true);