changed folder structure for gh-pages

app.js

@@ -0,0 +1,221 @@
+// Theme
+const theme1 = document.getElementById("theme1");
+const theme2 = document.getElementById("theme2");
+const theme3 = document.getElementById("theme3");
+
+if (localStorage.getItem("theme") === null) {
+  localStorage.setItem("theme", "theme1");
+}
+
+switch (localStorage.getItem("theme")) {
+  case "theme1":
+    theme1.checked = true;
+    break;
+  case "theme2":
+    theme2.checked = true;
+    break;
+  case "theme3":
+    theme3.checked = true;
+    break;
+}
+
+theme1.addEventListener("click", () => {
+  theme2.checked = false;
+  theme3.checked = false;
+  localStorage.setItem("theme", "theme1");
+});
+theme1.addEventListener("click", changeTheme);
+
+theme2.addEventListener("click", () => {
+  theme1.checked = false;
+  theme3.checked = false;
+  localStorage.setItem("theme", "theme2");
+});
+theme2.addEventListener("click", changeTheme);
+
+theme3.addEventListener("click", () => {
+  theme1.checked = false;
+  theme2.checked = false;
+  localStorage.setItem("theme", "theme3");
+});
+theme3.addEventListener("click", changeTheme);
+
+function changeTheme() {
+  if (theme1.checked) {
+    document.body.setAttribute("data-theme", "");
+  } else if (theme2.checked) {
+    document.body.setAttribute("data-theme", "light");
+  } else if (theme3.checked) {
+    document.body.setAttribute("data-theme", "purple");
+  }
+}
+
+changeTheme();
+
+// Functionality
+class Calculator {
+  constructor(prevOperandTextElement, currentOperandElement) {
+    this.prevOperandTextElement = prevOperandTextElement;
+    this.currentOperandTextElement = currentOperandTextElement;
+    this.clear();
+  }
+
+  clear() {
+    this.currentOperand = "";
+    this.prevOperand = "";
+    this.operation = undefined;
+  }
+
+  delete() {
+    this.currentOperand = this.currentOperand.toString().slice("0", -1);
+  }
+
+  appendNumber(number) {
+    if (number === "." && this.currentOperand.includes(".")) return;
+    this.currentOperand =
+      this.currentOperand.toString() + number.toString("number");
+  }
+
+  chooseOperation(operation) {
+    if (this.currentOperand === "") return;
+    if (this.prevOperand !== "") {
+      this.compute();
+    }
+    this.operation = operation;
+    this.prevOperand = this.currentOperand;
+    this.currentOperand = "";
+  }
+
+  compute() {
+    let computation;
+
+    const prev = parseFloat(this.prevOperand);
+    const current = parseFloat(this.currentOperand);
+    if (isNaN(prev) || isNaN(current)) return;
+
+    switch (this.operation) {
+      case "+":
+        computation = prev + current;
+        break;
+      case "-":
+        computation = prev - current;
+        break;
+      case "/":
+        computation = prev / current;
+        break;
+      case "x":
+        computation = prev * current;
+        break;
+      case "*":
+        computation = prev * current;
+        break;
+      default:
+        return;
+    }
+    this.currentOperand = computation;
+    this.operation = undefined;
+    this.prevOperand = "";
+  }
+
+  getDisplayNumber(number) {
+    const stringNumber = number.toString();
+    const integerDigits = parseFloat(stringNumber.split(".")[0]);
+    const decimalDigits = stringNumber.split(".")[1];
+    let integerDisplay;
+    if (isNaN(integerDigits)) {
+      integerDisplay = "";
+    } else {
+      integerDisplay = integerDigits.toLocaleString("en", {
+        maximumFractionDigits: 0,
+      });
+    }
+
+    if (decimalDigits != null) {
+      return `${integerDisplay}.${decimalDigits}`;
+    } else {
+      return integerDisplay;
+    }
+  }
+
+  updateDisplay() {
+    this.currentOperandTextElement.innerText = this.getDisplayNumber(
+      this.currentOperand
+    );
+    this.prevOperandTextElement.innerText = this.getDisplayNumber(
+      this.prevOperand
+    );
+
+    if (this.operation != undefined) {
+      this.prevOperandTextElement.innerText = `${this.getDisplayNumber(
+        this.prevOperand
+      )} ${this.operation}`;
+    }
+  }
+}
+
+const numberButtons = document.querySelectorAll("[data-number]");
+const operationButtons = document.querySelectorAll("[data-operation]");
+const equalsButton = document.querySelector("[data-equals]");
+const deleteButton = document.querySelector("[data-del]");
+const reset = document.querySelector("[data-reset]");
+const prevOperandTextElement = document.querySelector(
+  "[data-previous-operand]"
+);
+const currentOperandTextElement = document.querySelector(
+  "[data-current-operand]"
+);
+
+const calculator = new Calculator(
+  prevOperandTextElement,
+  currentOperandTextElement
+);
+
+numberButtons.forEach((button) => {
+  button.addEventListener("click", () => {
+    calculator.appendNumber(button.innerText);
+    calculator.updateDisplay();
+  });
+});
+
+operationButtons.forEach((button) => {
+  button.addEventListener("click", () => {
+    calculator.chooseOperation(button.innerText);
+    calculator.updateDisplay();
+  });
+});
+
+equalsButton.addEventListener("click", (button) => {
+  calculator.compute();
+  calculator.updateDisplay();
+});
+
+reset.addEventListener("click", (button) => {
+  calculator.clear();
+  calculator.updateDisplay();
+});
+
+deleteButton.addEventListener("click", (button) => {
+  calculator.delete();
+  calculator.updateDisplay();
+});
+
+document.body.addEventListener("keydown", (e) => {
+  if (isNaN(e.key) === false || e.key === ".") {
+    calculator.appendNumber(e.key);
+    calculator.updateDisplay();
+  } else if (e.key === "+" || e.key === "/" || e.key === "*" || e.key === "-") {
+    calculator.chooseOperation(e.key);
+    calculator.updateDisplay();
+  } else if (e.key === "Enter") {
+    calculator.compute();
+    calculator.updateDisplay();
+  } else if (e.key === "Backspace") {
+    calculator.delete();
+    calculator.updateDisplay();
+  } else if (e.key === "Delete") {
+    calculator.clear();
+    calculator.updateDisplay();
+  } else {
+    return;
+  }
+});