migrate to gtea from bistbucket

public/assets/js/custom/calculator.js

@@ -0,0 +1,80 @@
+
+document.addEventListener("DOMContentLoaded", function () {
+    const display = document.getElementById("display");
+    let currentExpression = "";
+
+
+    function buttonClickHandler(event) {
+      const buttonValue = event.target.innerText;
+
+
+      if (buttonValue === "C") {
+        currentExpression = "";
+      }
+
+      else if (buttonValue === "⌫") {
+        currentExpression = currentExpression.slice(0, -1);
+      }
+
+      else if (buttonValue === "=") {
+        try {
+          currentExpression = calculate(currentExpression).toString();
+        } catch {
+          currentExpression = "Error";
+        }
+      }
+
+      else if (buttonValue === "√") {
+        if (!currentExpression) {
+          currentExpression = "Error";
+        } else {
+          currentExpression = Math.sqrt(parseFloat(currentExpression)).toString();
+        }
+      }
+
+      else if (buttonValue === "x²") {
+        if (!currentExpression) {
+          currentExpression = "Error";
+        } else {
+          currentExpression = Math.pow(parseFloat(currentExpression), 2).toString();
+        }
+      }
+
+      else {
+
+        if (currentExpression === "Error") {
+          currentExpression = "";
+        }
+        currentExpression += buttonValue;
+      }
+
+
+      display.value = currentExpression;
+    }
+
+
+    function calculate(expression) {
+
+      expression = expression
+        .replace(/×/g, "*")
+        .replace(/÷/g, "/")
+        .replace(/−/g, "-");
+
+
+      try {
+        const result = Function(`return (${expression})`)();
+        if (result === Infinity || result === -Infinity || isNaN(result)) {
+          throw new Error("Math Error");
+        }
+        return result;
+      } catch {
+        return "Error";
+      }
+    }
+
+
+    const calculatorButtons = document.querySelectorAll(".button-row button");
+    calculatorButtons.forEach(button => {
+      button.addEventListener("click", buttonClickHandler);
+    });
+  });