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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>
Calculator | Javascript Mini Project | by Sheikh Ubada Bin Ashraf-Ul-Haq
</title>
<!-- css file link -->
<link rel="stylesheet" href="style.css" />
<!-- awesome icon link -->
<script
src="https://kit.fontawesome.com/87550c64f0.js"
crossorigin="anonymous"
></script>
</head>
<body>
<!-- Dark and light mode element -->
<div class="dark">
<div class="toggleBtn">
<i class="fa-solid fa-moon"></i>
</div>
</div>
<div class="calculator">
<div class="buttons">
<!-- Value Displat Screen -->
<h2 id="value"></h2>
<span id="clear">clear</span>
<span>/</span>
<span>*</span>
<span>7</span>
<span>8</span>
<span>9</span>
<span>-</span>
<span>4</span>
<span>5</span>
<span>6</span>
<span id="plus">+</span>
<span>1</span>
<span>2</span>
<span>3</span>
<span>0</span>
<span>00</span>
<span>.</span>
<span id="equal">=</span>
</div>
</div>
<!-- JavaScrip Part -->
<script>
// DOM
let buttons = document.querySelector(".buttons");
let btn = document.querySelectorAll("span");
let value = document.getElementById("value");
let toggleBtn = document.querySelector(".toggleBtn");
let body = document.querySelector("body");
// Looping
for (let i = 0; i < btn.length; i++) {
btn[i].addEventListener("click", function () {
if (this.innerHTML == "=") {
value.innerHTML = eval(value.innerHTML);
} else {
if (this.innerHTML == "clear") {
value.innerHTML = "";
} else {
value.innerHTML += this.innerHTML;
}
}
});
}
// Dark and Ligh mode function
toggleBtn.onclick = function () {
toggleBtn.innerHTML = "";
body.classList.toggle("dark");
if (body.className === "dark") {
toggleBtn.innerHTML = `<i class="fa-solid fa-sun"></i>`;
} else {
toggleBtn.innerHTML = `<i class="fa-solid fa-moon"></i>`;
}
};
</script>
</body>
</html>