PIbd-23_Sergunov_M.A._IP/MainPage/LogForMainPage.js

const operateButton = document.getElementById("operate");
const operateStringButton = document.getElementById("operateString");
const val1 = document.getElementById("val1");
const val2 = document.getElementById("val2");
const select = document.getElementById("operation");
const finish = document.getElementById("finish");
const operateFButton = document.getElementById("operateF");
const operateFStringButton = document.getElementById("operateFString");
const float1 = document.getElementById("float1");
const float2 = document.getElementById("float2");
const selectF = document.getElementById("operationF");
const finishF = document.getElementById("finishF");

operateButton.onclick=function(){
    operate("number");
};

operateStringButton.onclick=function(){
    operate("string");
}

operateFButton.onclick=function(){
    operate("numberF");
};

function operate(param){
    switch(parseInt(select.value)){
        case 1:
            doOperation("calc1", param)
            break;
        case 2:
            doOperation("calc2", param)
            break;
        case 3:
            doOperation("calc3", param)
            break;
        case 4:
            doOperation("calc4", param)
            break;
    };
}

function checkNumber(res){
    return res;
}

function doOperation(address, type){
    console.log("Тип переменных: " + type)
    fetch(`http://localhost:8080/${address}?val1=${val1.value}&val2=${val2.value}&type=${type}`)
        .then(response => response.text())
        .then(res=>finish.innerHTML=checkNumber(res));
}