如果沒有輸入用戶名，年齡提示仍然出現，如果沒有輸入用戶名，我希望整個提示終止，基本上，當它說“你不能沒有名字就繼續”時，提示要求輸入年齡仍然出現，我不希望發生這種情況。
這是我的代碼：
</style>
<body>
<h1>Welcome to </h1>
<h2> Hangman </h2>
<div class="wrapper">
<button onclick="myFunction()">Let's start</button>
</div>
<script>
function myFunction() {
let person = prompt("Please enter your name", "Marium");
if (person == null || person == "") {
alert("You cannot proceed without entering the name");
}
else {
alert("Hello " person);
}
let age= prompt("Please enter your age");
if (age<16) {
alert("User below 16 cannot proceed");
}
else {
window.location.href= "sample.html";
}
}
uj5u.com熱心網友回復：
您只需要return在 if 陳述句中的警報之前插入一個相對于缺少的用戶名案例的警報：
function myFunction() {
let person = prompt("Please enter your name", "Marium");
if (person == null || person == "") {
return alert("You cannot proceed without entering the name");
} else {
alert("Hello " person);
}
let age = prompt("Please enter your age");
if (age < 16) {
alert("User below 16 cannot proceed");
} else {
window.location.href = "sample.html";
}
}<h1>Welcome to </h1>
<h2> Hangman </h2>
<div class="wrapper">
<button onclick="myFunction()">Let's start</button>
</div>uj5u.com熱心網友回復：
return;后面加一個
alert("You cannot proceed without entering the name");
代碼：
<body>
<h1>Welcome to </h1>
<h2> Hangman </h2>
<div class="wrapper">
<button onclick="myFunction()">Let's start</button>
</div>
<script>
function myFunction() {
let person = prompt("Please enter your name", "Marium");
if (person == null || person == "") {
alert("You cannot proceed without entering the name");
return;
}
else {
alert("Hello " person);
}
let age= prompt("Please enter your age");
if (age<16) {
alert("User below 16 cannot proceed");
}
else {
window.location.href= "sample.html";
}
}
</style>
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