const arrayOfElements = document.querySelectorAll(".classNameToAddOnClickTo")

arrayOfElements.forEach(x => x.setAttribute("onclick", "methodToCall(this.id)"))

let all_btn = document.querySelectorAll("button");

all_btn.forEach(function(btn) {

    btn.addEventListener("click", function() {

        console.log(this.innerHTML + " is clicked")

    });

});

​

// one line code

// let all_btn=document.querySelectorAll("button");all_btn.forEach(function(n){n.addEventListener("click",function(){console.log(this.innerHTML+" is clicked")})});