チャレンジクリア！

//答え例
const sheet = document.getElementById('view');
const sheetContent = [];
const newSheet = function() {
for (let x = 0; x < 6; x++) {
const tr = document.createElement('tr');
sheet.appendChild(tr);
for (let y = 0; y < 5; y++) {
let td = document.createElement('td');
if (x === 0) {
switch (y) {
case 0: {
td.textContent = 'B';
break;
}
case 1: {
td.textContent = 'I';
break;
}
case 2: {
td.textContent = 'N';
break;
}
case 3: {
td.textContent = 'G';
break;
}
case 4: {
td.textContent = 'O';
break;
}
}
} else {
switch (y) {
case 0: {
check(y, td);
break;
}
case 1: {
check(y, td);
break;
}
case 2: {
if (x === 3) {
td.textContent = 'free';
td.setAttribute('class', 'hit-num');
break;
}
check(y, td);
break;
}
case 3: {
check(y, td);
break;
}
case 4: {
check(y, td);
break;
}
}
}
tr.appendChild(td);
}
}
};
const check = function(y, td) {
while (true) {
let calc = Math.floor(Math.random() * 15 + 15 * y + 1);
if (!sheetContent.includes(calc)) {
sheetContent.push(calc);
td.textContent = calc;
td.setAttribute('id', sheetContent.length - 1);
break;
}
}
};
console.log(sheetContent);
newSheet();
// チャレンジ問題
const numLog = [];
const hitNum = document.getElementById('hitNum');
hitNum.addEventListener('click', function() {
while (true) {
let randomNum = Math.floor(Math.random() * 75 + 1);
if (!numLog.includes(randomNum)) {
alert(数字は${randomNum}番です！);
numLog.push(randomNum);
let result = sheetContent.indexOf(randomNum);
if (result === -1) {
return;
}
const target = document.getElementById(result);
target.setAttribute('class', 'hit-num');
break;
}
}
});
// チャレンジ問題 ここまで

例２

const table = document.getElementById("view");
const bingo = ["B", "I", "N", "G", "O"];
let twoD = [];
for (let i = 0; i < 5; i++) {
let array = [];
while (array.length < 5) {
const min = 1 + 15 * i;
const max = 15 * (i + 1);
const rondom = Math.floor(Math.random() * (max - min) + min);
if (array.every((v) => v !== rondom)) {
array.push(rondom);
}
}
twoD.push(array);
}
const createTable = (array) => {
for (let i = 0; i < 6; i++) {
const tr = document.createElement("tr");
table.appendChild(tr);
for (let j = 0; j < 5; j++) {
const td = document.createElement("td");
if (i === 0) {
td.textContent = bingo[j];
tr.appendChild(td);
} else {
td.textContent = array[j][i - 1];
if (i === 3 && j === 2) {
td.textContent = "★";
td.className = "hit-num";
}
tr.appendChild(td);
}
}
}
};
createTable(twoD);