function setResult(result) {
    let lbl = `<label class="bg-success">Ответ:${result}</label>`;
    document.getElementById("result").innerHTML = lbl;
}
let addButton = document.getElementById("getResultAdd");
let a = document.getElementById("addNum1");
let b = document.getElementById("addNum2");
let Output = document.getElementById("addAnswer");
let address = "hello"
function add(){
address = "add"
executeRequest();
}
function sub(){
address = "sub"
executeRequest();
}
function mul(){
address = "mul"
executeRequest();
}
function del(){

address = "del"
if(b.value != 0) executeRequest();

}

function executeRequest() {

   let num1 = a.value;
   let num2 = b.value;
   console.log("a" + num1 + "b" + num2)
    fetch(`http://localhost:8080/${address}?a=${num1}&b=${num2}`)
        .then(response => {
               return response.json();
           })
           .then(result => {
               setResult(result);
           })
}