[英]execution of JavaScript
您能否幫助我了解代碼的問題以及為什么單擊按鈕后按鈕不起作用? 我相信我錯過了一小部分,但找不到。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Conditions</title>
<link href="css/styles.css" rel="stylesheet">
<script>
function AgeCh
{
var Age = prompt("Please enter your age here","from 4 to 100");
if (Age >= 16)
{
document.write("You are old enough to drive.");
}
else if (Age >=21)
{
document.write("You are old enough to drive and vote.");
}
else if (Age >=65)
{
document.write("You are old enough to drive, vote and retire.");
}
else
{
document.write ("thinks");
}
}
</script>
</head>
<body>
<div class="classselector">
<button type = "button" onclick="AgeCh()">Age Checker</button>
</div>
</body>
</html>
我非常感謝您的幫助。 我真的不知道為什么javascript在這里不起作用。
您在AgeCh中丟失()
。 函數應定義為AgeCh()
更正的代碼:
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Conditions</title>
<link href="css/styles.css" rel="stylesheet">
<script>
function AgeCh()
{
var Age = prompt("Please enter your age here","from 4 to 100");
if (Age >= 16)
{
document.write("You are old enough to drive.");
}
else if (Age >=21)
{
document.write("You are old enough to drive and vote.");
}
else if (Age >=65)
{
document.write("You are old enough to drive, vote and retire.");
}
else
{
document.write ("thinks");
}
}
</script>
</head>
<body>
<div class="classselector">
<button type = "button" onclick="AgeCh()">Age Checker</button>
</div>
</body>
</html>
定義函數似乎是一個錯誤。 我使用let AgeCh = function() {}
重新定義了您的函數,這似乎可以使您的函數正常工作。
https://plnkr.co/edit/rHBbofiwvO55bCLDA4jg?p=preview
函數文檔: https : //developer.mozilla.org/zh-CN/docs/Web/JavaScript/Guide/Functions
是的,請檢查您的函數聲明是否錯誤
function AgeCh
{
改成
function AgeCh()
{
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