我想将以摄氏度给出的温度转换为华氏度，或者反之亦然。我希望通过单选按钮形式选择单位，并使用 JS 函数计算转换后的单位。然而，我做错了什么，我不确定到底是什么。任何帮助，将不胜感激。谢谢。
<body>
<p>Convert temperatures to and from celsius, fahrenheit.</p>
<p id="myForm>
<form name="units" onsubmit="return convertTemp();" method="post">
<input type="number" id="temp"><br>
Temperature in:
<fieldset>
<input type="radio" name="Temperature" id="c" value="c" checked><label for="c">Celsius degrees</label>
<input type="radio" name="Temperature" id="f" value="f"><label for="f">Fahrenheit degrees</label>
</fieldset>
<input type="submit" value="Oblicz">
<form>
</p>
<p id="wynik"></p>
这是我的 JavaScript 函数:
function convertTemp() {
alert("Włączyła się");
var x = document.Jednostki.Temperature.value;
if (x == "c"){
alert("Celsjusz");
}
else if (x == "f"){
alert("Fahrenheit");
}
returns false;
}
最佳答案
这是我的建议
window.addEventListener("load", function() {
document.getElementById("units").addEventListener("submit", function(e) {
e.preventDefault();
console.log("Włączyła się");
var num = parseInt(document.getElementById("temp").value, 10);
if (document.getElementById("c").checked) {
console.log("Celsjusz");
document.getElementById("wynik").innerHTML = num + "C," + (Math.round(num * 9 / 5) + 32) + "F";
} else if (document.getElementById("f").checked) {
console.log("Fahrenheit");
document.getElementById("wynik").innerHTML = num + "F," + (Math.round((num - 32) * 5 / 9)) + "C";
}
});
});<p>Convert temperatures to and from celsius, fahrenheit.</p>
<p>
<form id="units">
<input type="number" id="temp"><br> Temperature in:
<fieldset>
<input type="radio" name="Temperature" id="c" value="c" checked><label for="c">Celsius degrees</label>
<input type="radio" name="Temperature" id="f" value="f"><label for="f">Fahrenheit degrees</label>
</fieldset>
<input type="submit" value="Oblicz">
<form>
</p>
<p id="wynik"></p>使用查询选择器:
window.addEventListener("load", function() {
document.getElementById("units").addEventListener("submit", function(e) {
e.preventDefault();
console.log("Włączyła się");
const num = parseInt(document.getElementById("temp").value, 10);
const type = document.querySelector("[name=Temperature]:checked").value;
if (type==="c") {
console.log("Celsjusz");
document.getElementById("wynik").innerHTML = num + "C," + (Math.round(num * 9 / 5) + 32) + "F";
} else {
console.log("Fahrenheit");
document.getElementById("wynik").innerHTML = num + "F," + (Math.round((num - 32) * 5 / 9)) + "C";
}
});
});<p>Convert temperatures to and from celsius, fahrenheit.</p>
<p>
<form id="units">
<input type="number" id="temp"><br> Temperature in:
<fieldset>
<input type="radio" name="Temperature" id="c" value="c" checked><label for="c">Celsius degrees</label>
<input type="radio" name="Temperature" id="f" value="f"><label for="f">Fahrenheit degrees</label>
</fieldset>
<input type="submit" value="Oblicz">
<form>
</p>
<p id="wynik"></p>关于javascript - 带有单选按钮和一个输入字段的表单。根据选择的单选按钮计算值，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31618118/