这里仍然有点新,所以请耐心等待,因为我是JS的新手,并且有点教自己。
所以我一直在尝试编写一个简单的石头剪刀布游戏脚本,我已经让它在我的机器上本地工作,但对于我的生活,我无法弄清楚为什么它不能在 JSFiddle 上运行。我首先开始用JSFiddle写出来,但是在我对JSLint认为它有效但让游戏挂在我的JS中的某个地方感到沮丧之后,我决定将其移动到记事本并在本地尝试。好吧,它有效,但我无法弄清楚为什么它不喜欢小提琴。也许你们可以为我阐明这一点
<html>
<head>
<script>
var ties = 0;
var wins = 0;
var losses = 0;
// randInt returns a random integer between 0 and 2
function randInt() {return Math.floor(Math.random()*3);}
function msgAlert(msg, player, comp) {
var outcome = ["Rock", "Paper", "Scissors"];
if (msg === "tie") {
alert("Tie!n" + "Player: " + outcome[player] + "n" + "Computer: " + outcome[comp]);
}
if (msg === "win") {
alert("You won!n" + "Player: " + outcome[player] + "n" + "Computer: " + outcome[comp]);
}
if (msg === "lose") {
alert("You lost!n" + "Player: " + outcome[player] + "n" + "Computer: " + outcome[comp]);
}
}
function updateScore(result) {
var tieElement = document.getElementById("tie");
var winElement = document.getElementById("win");
var loseElement = document.getElementById("lose");
if (result === "tie") {
ties++;
tieElement.innerText = ties;
}
if (result === "win") {
wins++;
winElement.innerText = wins;
}
if (result === "lose") {
losses++;
loseElement.innerText = losses;
}
}
function hand(player) {
var comp = randInt();
if (player === comp) {
updateScore("tie");
msgAlert("tie", player, comp);
}
/* Rock Conditions */
if (player === 0 && comp === 1) {
updateScore("lose");
msgAlert("lose", player, comp);
}
if (player === 0 && comp === 2) {
updateScore("win");
msgAlert("win", player, comp);
}
/* Paper Conditions */
if (player === 1 && comp === 0) {
updateScore("win");
msgAlert("win", player, comp);
}
if (player === 1 && comp === 2) {
updateScore("lose");
msgAlert("lose", player, comp);
}
/* Scissors Conditions */
if (player === 2 && comp === 0) {
updateScore("lose");
msgAlert("lose", player, comp);
}
if (player === 2 && comp === 1) {
updateScore("win");
msgAlert("win", player, comp);
}
}
</script>
</head>
<body bgcolor=tan>
<H1 align=center>Let's play Rock Paper Scissors!</H1>
<H2>Instructions</H2>
<p>Click a button to choose what to throw</p>
<p id="buttons">
<input type="button" value="Rock" onclick="hand(0);" />
<input type="button" value="Paper" onclick="hand(1);" />
<input type="button" value="Scissors" onclick="hand(2);" />
</p>
<h3>Scoreboard:</h3>
<ul id="scoreboard">
<li>
Wins: <span id="win">0</span>
</li>
<li>
Losses: <span id="lose">0</span>
</li>
<li>
Ties: <span id="tie">0</span>
</li>
</ul>
</body>
</html>
此示例代码在 jsbin.com
要使其在 jsFiddle 中工作,您必须将 jsFiddle 中的左上角设置设置为"无换行 - 在<正文>"。 正文>
当您将其设置为 onload
时,这会将所有代码放在 onload 处理程序中,并且不会全局声明任何内容(它在 onload 处理程序函数中声明)。 由于没有全局声明任何内容,因此 hand()
函数不是全局的,并且在直接从 HTML 调用时不起作用,因为它的范围必须是全局的,才能通过 HTML 的直接调用访问。
工作演示:http://jsfiddle.net/jfriend00/E9aFy/
jsbin.com 时运行良好,请查看并启用 javascript(如果没有)