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arithmaster.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>arithmaster</title>
<style>
body {
font-family: Arial, sans-serif;
display: flex;
flex-direction: column;
justify-content: flex-start;
align-items: center;
height: 100vh;
margin: 0;
background-color: #f9f9f9;
}
nav {
background-color: #007bff;
width: 100%;
padding: 10px 0;
display: flex;
justify-content: center;
gap: 15px;
}
nav button {
background-color: white;
color: #007bff;
border: 1px solid #007bff;
border-radius: 5px;
padding: 10px 15px;
font-size: 16px;
cursor: pointer;
}
nav button.active {
background-color: #0056b3;
color: white;
}
table {
border-collapse: collapse;
margin: 20px 0;
}
td {
border: 1px solid #ddd;
text-align: center;
padding: 5px;
}
input {
width: 50px;
text-align: center;
padding: 5px;
border: 1px solid #ccc;
border-radius: 4px;
-moz-appearance: textfield;
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
-webkit-appearance: none;
margin: 0;
}
input:focus {
outline: none;
border-color: #007bff;
}
.correct {
background-color: #c8f7c5;
}
.incorrect {
background-color: #f7c5c5;
}
.header {
font-weight: bold;
background-color: #f0f0f0;
}
button {
background-color: #007bff;
color: white;
border: none;
border-radius: 5px;
padding: 10px 15px;
font-size: 16px;
cursor: pointer;
margin-top: 20px;
}
button:hover {
background-color: #0056b3;
}
</style>
</head>
<body>
<nav>
<button class="tab active" data-digits="2">2-Digit</button>
<button class="tab" data-digits="3">3-Digit</button>
<button class="tab" data-digits="4">4-Digit</button>
<button class="tab" data-digits="5">5-Digit</button>
<button class="tab" data-digits="6">6-Digit</button>
<button class="tab" data-digits="7">7-Digit</button>
<button class="tab" data-digits="8">8-Digit</button>
</nav>
<table id="additionTable"></table>
<button id="resetButton">Reset Game</button>
<script>
let digitCount = 2;
const generateRandomNumber = () => {
const max = Math.pow(10, digitCount) - 1;
const min = Math.pow(10, digitCount - 1);
return Math.floor(Math.random() * (max - min + 1)) + min;
};
const createTable = () => {
const table = document.getElementById('additionTable');
table.innerHTML = '';
for (let row = 0; row <= 10; row++) {
const tr = document.createElement('tr');
for (let col = 0; col <= 10; col++) {
const td = document.createElement('td');
if (row === 0 && col === 0) {
td.classList.add('header');
} else if (row === 0 || col === 0) {
const randomNumber = generateRandomNumber();
td.textContent = randomNumber;
td.classList.add('header');
td.dataset.value = randomNumber;
} else {
const input = document.createElement('input');
input.type = 'number';
input.addEventListener('keydown', (e) => handleInput(e, row, col));
td.appendChild(input);
}
tr.appendChild(td);
}
table.appendChild(tr);
}
};
const handleInput = (event, row, col) => {
if (event.key === 'Enter') {
if (!event.target.value) return;
const table = document.getElementById('additionTable');
const input = event.target;
const value = parseInt(input.value, 10);
const rowHeader = parseInt(table.rows[row].cells[0].dataset.value, 10);
const colHeader = parseInt(table.rows[0].cells[col].dataset.value, 10);
const expectedSum = rowHeader + colHeader;
if (value === expectedSum) {
input.classList.add('correct');
input.classList.remove('incorrect');
} else {
input.classList.add('incorrect');
input.classList.remove('correct');
}
const nextInput = findNextInput(row, col);
if (nextInput) nextInput.focus();
}
};
const findNextInput = (currentRow, currentCol) => {
const table = document.getElementById('additionTable');
for (let row = currentRow; row < table.rows.length; row++) {
for (
let col = row === currentRow ? currentCol + 1 : 1;
col < table.rows[row].cells.length;
col++
) {
const input = table.rows[row].cells[col].querySelector('input');
if (input) return input;
}
}
return null;
};
const resetGame = () => {
createTable();
};
const handleTabClick = (e) => {
document.querySelectorAll('.tab').forEach((tab) => tab.classList.remove('active'));
e.target.classList.add('active');
digitCount = parseInt(e.target.dataset.digits, 10);
createTable();
};
document.getElementById('resetButton').addEventListener('click', resetGame);
document.querySelectorAll('.tab').forEach((tab) => {
tab.addEventListener('click', handleTabClick);
});
createTable();
</script>
</body>
</html>