javascript - 单击时如何更改按钮的值?
问题描述
在课堂上,我正在做一个井字游戏,并且已经被困了 2 天,试图让 x 和 o 出现,作业明天到期!这是作业表:
COMPSCI20:井字游戏作业
创建一个如上所示的 HTML 文件。HTML 文件应包含以下内容:
- 页面标题和指向 CSS 文件的链接
- 包含文本的标题分区(带有 ID)
- 一个包含可点击按钮的 3x3 表的主分区(带有 ID)(带有一个类,每个都有 ID)
- 包含文本标题 + 链接 主 + 表 标题 页脚 </li> 的页脚分区(带有 ID)
创建一个 CSS 文件来设置内容的样式,如上所示。CSS 文件应包含以下内容:
- 在标题部分中,定义字体、背景颜色、文本对齐和填充
- 在主分区中,定义背景颜色和填充
- 按钮应具有定义的高度、宽度、字体、背景颜色和边框
- 在页脚部分,定义字体、背景颜色、文本对齐和填充
创建一个包含两个全局变量的 JS 文件:一个存储玩家回合(X 或 O),一个存储获胜者。JS 文件还应包含以下函数:
Start()
将玩家轮到以 X 开始,将获胜者设置为 null 的函数- 将
ChooseSquare()
适当的字母放置在单击的按钮上,禁用单击的按钮并切换到其他玩家回合的功能 CheckWin()
检查每个可能的获胜组合并在玩家获胜时在页脚显示消息的功能
这就是我所拥有的:
var winner;
var current;
function Start() {
current = "x";
}
function ChooseSquare() {
if (document.getElementById("button1").onclick) {
document.getElementById("button1").value = "x";
document.getElementById("button1").disabled = true;
current = "o";
} else if (document.getElementById("button2").onclick) {
document.getElementById("button2").value = "x";
document.getElementById("button2").disabled = true;
current = "o";
} else if (document.getElementById("button3").onclick) {
document.getElementById("button3").value = "x";
document.getElementById("button3").disabled = true;
current = "o";
} else if (document.getElementById("button4").onclick) {
document.getElementById("button4").value = "x";
document.getElementById("button4").disabled = true;
current = "o";
} else if (document.getElementById("button5").onclick) {
document.getElementById("button5").value = "x";
document.getElementById("button5").disabled = true;
current = "o";
} else if (document.getElementById("button6").onclick) {
document.getElementById("button6").value = "x";
document.getElementById("button6").disabled = true;
current = "o";
} else if (document.getElementById("button7").onclick) {
document.getElementById("button7").value = "x";
document.getElementById("button7").disabled = true;
current = "o";
} else if (document.getElementById("button8").onclick) {
document.getElementById("button8").value = "x";
document.getElementById("button8").disabled = true;
current = "o";
} else if (document.getElementById("button9").onclick) {
document.getElementById("button9").value = "x";
document.getElementById("button9").disabled = true;
current = "o";
}
if (document.getElementById("button1").onclick) {
document.getElementById("button1").value = "o";
document.getElementById("button1").disabled = true;
current = "x"
1;
} else if (document.getElementById("button2").onclick) {
document.getElementById("button2").value = "o";
document.getElementById("button2").disabled = true;
current = "x";
} else if (document.getElementById("button3").onclick) {
document.getElementById("button3").value = "o";
document.getElementById("button3").disabled = true;
current = "x";
} else if (document.getElementById("button4").onclick) {
document.getElementById("button4").value = "o";
document.getElementById("button4").disabled = true;
current = "x";
} else if (document.getElementById("button5").onclick) {
document.getElementById("button5").value = "x";
document.getElementById("button5").disabled = true;
current = "x";
} else if (document.getElementById("button6").onclick) {
document.getElementById("button6").value = "o";
document.getElementById("button6").disabled = true;
current = "x";
} else if (document.getElementById("button7").onclick) {
document.getElementById("button7").value = "o";
document.getElementById("button7").disabled = true;
current = "x";
} else if (document.getElementById("button8").onclick) {
document.getElementById("button8").value = "o";
document.getElementById("button8").disabled = true;
current = "x";
} else if (document.getElementById("button9").onclick) {
document.getElementById("button9").value = "o";
document.getElementById("button9").disabled = true;
current = "x";
}
}
function CheckWin() {
var one = document.getElementById("button1");
var two = document.getElementById("button2");
var three = document.getElementById("button3");
var four = document.getElementById("button4");
var five = document.getElementById("button5");
var six = document.getElementById("button6");
var seven = document.getElementById("button7");
var eight = document.getElementById("button8");
var nine = document.getElementById("button9");
//x wins
if (one == "x" && two == "x" && three == "x") {
window.alert("player1 has won")
}
if (one == "x" && four == "x" && seven == "x") {
window.alert("player1 has won")
}
if (one == "x" && five == "x" && nine == "x") {
window.alert("player1 has won")
}
if (two == "x" && five == "x" && eight == "x") {
window.alert("player1 has won")
}
if (three == "x" && six == "x" && nine == "x") {
window.alert("player1 has won")
}
if (three == "x" && five == "x" && seven == "x") {
window.alert("player1 has won")
}
if (four == "x" && five == "x" && six == "x") {
window.alert("player1 has won")
}
if (seven == "x" && nine == "x" && eight == "x") {
window.alert("player1 has won")
}
//o wins
if (one == "o" && two == "o" && three == "o") {
window.alert("player2 has won")
}
if (one == "o" && four == "o" && seven == "o") {
window.alert("player2 has won")
}
if (one == "o" && five == "o" && nine == "o") {
window.alert("player2 has won")
}
if (two == "o" && five == "o" && eight == "o") {
window.alert("player2 has won")
}
if (three == "o" && six == "o" && nine == "o") {
window.alert("player2 has won")
}
if (three == "o" && five == "o" && seven == "o") {
window.alert("player2 has won")
}
if (four == "o" && five == "o" && six == "o") {
window.alert("player2 has won")
}
if (seven == "o" && nine == "o" && eight == "o") {
window.alert("player2 has won")
}
}
function reset() {
one.value = " "
one.disabled = false
two.value = " "
two.disabled = false
two.value = " "
three.disabled = false
three.value = " "
four.disabled = false
four.value = " "
five.disabled = false
five.value = " "
six.disabled = false
six.value = " "
seven.disabled = false
seven.value = " "
eight.disabled = false
eight.value = " "
nine.disabled = false
nine.disabled = false
}
#Header {
background-color: Red;
color: white;
text-align: center;
font-family: Acme, Arial, sans-serif;
padding: 5px;
}
#Main {
margin-left: 200px;
margin-right: 100px;
padding: 0px;
background-color: white;
}
td {
width: 30px;
height: 70px;
}
#Footer {
background-color: grey;
text-align: center;
color: white;
font-family: "Playfair Display", "Times New Roman", serif;
padding: 0px;
font-size: 20px;
}
.button {
height: 100px;
width: 100px;
background-color: purple;
font-family: Acme, Arial, sans-serif;
border-color: black;
border-width: 5px;
color: white;
font-size: 20px;
}
<html>
<head>
<title> Tic Tac Toe </title>
<link href="https://fonts.googleapis.com/css?family=Acme|Playfair+Display&display=swap" rel="stylesheet">
</head>
<body onload="Start()">
<div id="Header">
<h1> Tic Tac Toe </h1>
</div>
<div id="Main">
<table>
<tr>
<td id="button1"> <input class="button" type="button" onclick="ChooseSquare()"></td>
<td id="button2"> <input class="button" type="button" onclick="ChooseSquare()"></td>
<td id="button3"> <input class="button" type="button" onclick="ChooseSquare()"></td>
</tr>
<tr>
<td id="button4"> <input class="button" type="button" onclick="ChooseSquare()"></td>
<td id="button5"> <input class="button" type="button" onclick="ChooseSquare()"></td>
<td id="button6"> <input class="button" type="button" onclick="ChooseSquare()"></td>
</tr>
<tr>
<td id="button7"> <input class="button" type="button" onClick="ChooseSquare()"></td>
<td id="button8"> <input class="button" type="button" onClick="ChooseSquare()"></td>
<td id="button9"> <input class="button" type="button" onClick="ChooseSquare()"></td>
</tr>
</table>
<input type="button" onClick='reset()' value="reset">
</div>
<div id="Footer">
<p id="foot"> Read to Play? Click on a square!</p>
</div>
</body>
</html>
解决方案
我无法抗拒...
const main = document.querySelector('#Main')
, All_bt = document.querySelectorAll('#Main > button')
, btReset = document.querySelector('#bt-reset')
;
var current = 0
, players = [ { cod: 'x', case: [ ] }
, { cod: 'o', case: [ ] }
]
;
main.onclick=e=>
{
if (e.target.tagName.toLowerCase() !== 'button') return;
e.target.textContent = players[current].cod;
e.target.disabled = true
players[current].case.push( e.target.id.slice(-3))
// check win...
let Win = false
, Kaz = []
for(i=1;i<4;i++)
{
Kaz = players[current].case.filter(K=>Number(K.charAt(0))===i)
if (Kaz.length===3) { Win=true; break }
Kaz = players[current].case.filter(K=>Number(K.charAt(2))===i)
if (Kaz.length===3) { Win=true; break }
}
if (!Win)
{
Kaz = players[current].case.filter(K=>K==='1-1' || K==='2-2' || K==='3-3')
Win = (Kaz.length===3)
}
if (!Win)
{
Kaz = players[current].case.filter(K=>K==='1-3' || K==='2-2' || K==='3-1')
Win = (Kaz.length===3)
}
// console.log(Win)
if (Win)
{
All_bt.forEach(bt=>
{
bt.disabled=true
if ( Kaz.includes( bt.id.slice(-3) ))
{ bt.className='Win' }
})
}
current = ++current %2
}
btReset.onclick=_=>
{
current = 0
players[0].case.length = 0
players[1].case.length = 0
All_bt.forEach(bt=>{ bt.disabled=false; bt.textContent = '\u00a0'; bt.className='' })
}
#Main {
display: block;
--bt-size : 50px;
width:180px;
}
#Main > button {
display: inline-block;
width: var(--bt-size);
height: var(--bt-size);
margin: 2px;
font-size: 30px;
font-weight: bold;
text-align: center;
padding: 0;
}
.Win {
background-color: turquoise;
}
#bt-reset { margin: 1em;}
<div id="Main">
<button id="bt-1-1"> </button>
<button id="bt-1-2"> </button>
<button id="bt-1-3"> </button>
<button id="bt-2-1"> </button>
<button id="bt-2-2"> </button>
<button id="bt-2-3"> </button>
<button id="bt-3-1"> </button>
<button id="bt-3-2"> </button>
<button id="bt-3-3"> </button>
</div>
<button id="bt-reset">reset</button>
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