我是JS菜鸟，试图将其设为“您好，先生/小姐!”清洁。
我没有办法在if / else内部重构警报，因为那样我就失去了var b的值。
JS:
<script>
"use strict";
window.onload = function () {
let form1 = document.getElementById('myForm');
form1.addEventListener('submit', helloYou);
function helloYou() {
let x = document.getElementById("1").value;
let a = document.getElementById('3').value;
if ( a === "M") {
let b = "Mr.";
alert('Hello ' + b + " " + x + "!");
}
else {
let b = "Miss";
alert('Hello ' + b + " " + x + "!");
}
}
}
</script>
HTML:
<body>
<form id="myForm">
Write your name:
<input type="text" name="yourname" id="1" placeholder="name">
<select name="gender" id="3">
<option value="M">Male</option>
<option value="F">Female</option>
<input type="submit" name="submission" id="2" value="TRY ME">
</form>
</body>
感谢您的任何建议。
最佳答案
您可以使用三元运算符
alert('Hello ' + ( a === "M" ? "Mr." : "Miss" ) + " " + x + "!");
即
function helloYou() {
let x = document.getElementById("1").value;
let a = document.getElementById('3').value;
alert('Hello ' + ( a === "M" ? "Mr." : "Miss" ) + " " + x + "!");
}
关于javascript - 找不到重构警报(锻炼)的方法，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/49755379/