Javascript shows no errors but no output is given

"use strict";

window.onload = function() {
console.log("SPLUNGE");
const $ = selector => document.querySelector(selector);
/*********************
*  helper functions  *
**********************/

const calculateFahrenheit = temp => temp * 9/5 + 32;
const calculateCelsius = temp => (temp-32) * 5/9;

const toggleDisplay = (label1Text, label2Text) => {
$("#degree_label_1").innerText = label1Text;
    console.log(label1Text);
$("#degree_label_2").innerText = label2Text;
    console.log(label2Text);
// move focus
    $("#degrees_entered").focus();
};

const toCelsius = () => toggleDisplay("Enter F degrees:", "Degrees Celsius:");
const toFahrenheit = () => toggleDisplay("Enter C degrees:", "Degrees Fahrenheit:");       

/****************************
*  event handler functions  *
*****************************/
const convertTemp = () => {   
    var val = parseFloat($("degrees_entered").value);
    if(isNaN(val)) {
            alert("Enter a valid number for degrees");
        } else {
            if($("to_celsius").checked) {
                $("degrees_computed").value = calculateCelsius(val);
                toCelsius;
                console.log(calculateCelsius(val));
        } else {
            $("degrees_computed").value = calculateFahrenheit(val);
            toFahrenheit;
            console.log(calculateFahrenheit(val));
        }

}
};

document.addEventListener("DOMContentLoaded", () => {
    // add event handlers
    $("#convert").addEventListener("click", convertTemp);
    $("#to_celsius").addEventListener("click", toCelsius);
    $("#to_fahrenheit").addEventListener("click", toFahrenheit);

    // move focus
    $("#degrees_entered").focus();
});
};