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[英]How can i add the numbers of checked checkbox to this jquery / js code
[英]How can i add numbers to a variable in JS?
我一直在尝试做一个简单的游戏,在其中您尝试获取正确的数字作为随机数。 如果您赢了,您将获得1分。 但是我无法说明这一点。 这是我所做的:
<html>
<head>
<title>Luck Game</title>
<script>
function onClick(){
var number = Math.floor(Math.random()*10);
var usernumber = document.getElementById("input").value ;
var points = 0;
document.getElementById("Answer").innerHTML = number ;
document.getElementById("points").innerHTML = "Points in your account : " + points;
if(usernumber == number){
document.getElementById("WIN?").innerHTML = "You WON !. You got 1 point added to your account !";
points = points + 1;
}
else{
document.getElementById("WIN?").innerHTML = "Ow, no luck, you lost..."
}
}
</script>
</head>
<body>
<input id="input"></input>
<p id="Answer"></p>
<button onClick="onClick()"></button>
<p id="WIN?"></p>
<p id="points"></p>
</body>
但是“ points = points + 1”不起作用! 怎么了 ? 请帮我 。
您应该在click函数之外声明var points
。 例如:
<script>
var points = 0;
function onClick(){
var number = Math.floor(Math.random()*10);
var usernumber = document.getElementById("input").value ;
document.getElementById("Answer").innerHTML = number ;
document.getElementById("points").innerHTML = "Points in your account : " + points;
if(usernumber == number){
document.getElementById("WIN?").innerHTML = "You WON !. You got 1 point added to your account !";
points = points + 1;
}
else{
document.getElementById("WIN?").innerHTML = "Ow, no luck, you lost..."
}
}
</script>
因此,该计数器将保存在其他位置,而无需每次函数proc重置。
编写方式, points
是onClick()
函数本地的变量,因此每次调用该函数时,它将重置为零。 如果从onClick()
拉出points
的初始化,则可以安全地增加其值:
<script>
var points = 0;
function onClick(){
var number = Math.floor(Math.random()*10);
var usernumber = document.getElementById("input").value ;
document.getElementById("Answer").innerHTML = number ;
document.getElementById("points").innerHTML = "Points in your account : " + points;
if(usernumber == number){
document.getElementById("WIN?").innerHTML = "You WON !. You got 1 point added to your account !";
points++;
} else {
document.getElementById("WIN?").innerHTML = "Ow, no luck, you lost..."
}
}
</script>
在函数外部声明var
点:
var points = 0;
function onClick(){
...
}
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