Create secondary script for troubleshooting and code rewrite

script2.js

@@ -0,0 +1,133 @@
+const mainScreen = document.querySelector(".main-screen");
+const topScreen = document.querySelector(".top-screen");
+const numButtons = document.querySelectorAll(".num");
+const equalButton = document.querySelector(".equal");
+const opButtons = document.querySelectorAll(".operator");
+const clearButtons = document.querySelectorAll(".clear");
+const operators = ["+", "-", "*", "/"];
+let inOps = false;
+let isEval = false;
+
+
+numButtons.forEach((button) => {
+    button.addEventListener("click", displayNum);
+});
+
+opButtons.forEach((button) => {
+    button.addEventListener("click", displayOperator);
+});
+
+clearButtons.forEach((button) => {
+    button.addEventListener("click", clear);
+});
+
+equalButton.addEventListener("click", displayEval);
+
+
+function displayEval() {
+    console.log(this.textContent);
+
+}
+
+
+function displayOperator() {
+    console.log(this.textContent);
+}
+
+
+function displayNum() {
+    console.log(this.textContent);
+}
+
+
+function clear() {
+    console.log(this.textContent);
+
+    if (this.classList.contains("all")) {
+        mainScreen.textContent = "0";
+        topScreen.textContent = "";
+
+    } else if (this.classList.contains("error") && mainScreen.textContent !== "0") {
+            mainScreen.textContent = mainScreen.textContent.trimEnd()
+            mainScreen.textContent = mainScreen.textContent.slice(0, -1);
+
+            if (!isNaN(mainScreen.textContent.charAt(-2))) {
+                 mainScreen.textContent = mainScreen.textContent.trimEnd()
+            }
+
+            if (mainScreen.textContent === "") {
+                mainScreen.textContent = "0"
+            }
+    }
+}
+
+
+function addDecimals(a, b) {
+    a = String(a);
+    b = String(b);
+
+    const adec = (a.split(".")[1] || "").length;
+    const bdec = (b.split(".")[1] || "").length;
+    const maxDec = Math.max(adec, bdec);
+    let divdec = "1";
+    divdec = divdec.padEnd(maxDec, "0");
+
+    return ((+a * divdec + +b * divdec) / divdec).toFixed(maxDec); 
+}
+
+
+function multiplyDecimals(a, b) {
+    a = String(a);
+    b = String(b);
+
+    const adec = (a.split(".")[1] || "").length;
+    const bdec = (b.split(".")[1] || "").length;
+    const totalDec = adec + bdec;
+    
+    return (a * b).toFixed(totalDec)
+}
+
+
+function divideDecimals(a, b) {
+    a = String(a);
+    b = String(b);
+
+    const adec = (a.split(".")[1] || "").length;
+    const bdec = (b.split(".")[1] || "").length;
+    const maxDec = Math.max(adec, bdec);
+    const divisor = Math.pow(10, maxDec);
+   
+    return(a * divisor) / (b * divisor);
+}
+
+
+function Calculator(str) {
+    console.log("Calculator has been called")
+    isEval = true;
+    
+    this.methods = {
+        "-": (a, b) => addDecimals(a, -b),
+        "+": (a, b) => addDecimals(a, b), 
+        "/": (a, b) => divideDecimals(a, b),
+        "*": (a, b) => multiplyDecimals(a, b)
+    };
+
+    this.calculate = function(str) {
+        let parts = str.split(" ");
+        a = +parts[0];
+        op = parts[1];
+        b = +parts[2];
+
+
+        if ((a || a == "0") && !b) {
+            return a;
+        }
+        if (isNaN(a) || isNaN(b)) {
+            return NaN;
+        }
+        if (!this.methods[op]) {
+            return "Operation not supported."
+        }
+        return this.methods[op](a, b);
+    };
+}