在按钮后添加一个跨度以包含最终结果:
<span id="final-result"></span>
向按钮添加onclick事件,看起来可能像这样:
<button type="button" onclick="onButtonSubmit()"></button>
您还可以给输入一些相关的ID,例如:
<input type = "text" id="first-length" required placeholder= "1st legnth">
<input type = "text" id="second-length" required placeholder= "2nd legnth">
最后,编写onButtonSubmit函数以访问输入并调用resolveforHyp函数:
function onButtonSubmit(){
const firstValue = document.getElementById('first-length').value;
const secondValue = document.getElementById('second-length').value;
document.getElementById('final-result').innerText = solveforHyp(firstValue,secondValue); // finally,put the returned value in the created span.
}
,
首先,您的文档结构是完全错误的,HTML标记后有很多未关闭脚本的标记,并且内容被写入head标记内,并且head处于main内,没有完成doctype声明,最重要的是您想提交一些东西,至少应该防止其默认行为。在JavaScript Brother之前学习HTML,并且在知道输入始终为数字的情况下,最好使用输入类型Number。
这是您要编写的代码
<!DOCTYPE html>
<html>
<head>
<title>Example</title>
</head>
<body>
<form id="formOne">
<input type="number" required placeholder="1st legnth" id="first">
<br> <br>
<input type="number" required placeholder="2nd legnth" id="second">
<br> <br>
<button type="submit">Give me the answer</button>
</form>
</body>
<script>
let form = document.querySelector("#formOne");
let inputOne = document.querySelector("#first");
let inputTwo = document.querySelector("#second");
form.addEventListener("submit",function(e){
e.preventDefault();
console.log(Math.sqrt(Math.pow(inputOne.value,2) + Math.pow(inputTwo.value,2)));
})
</script>
</html>
,
要调用的js文件功能
function tryMe(arg) {
document.write(arg);
}
HTML文件
<!DOCTYPE html>
<html>
<head>
<script type="text/javascript" src='object.js'> </script>
<title>abc</title><meta charset="utf-8"/>
</head>
<body>
<script>
tryMe('This is me vishal bhasin signing in');
</script>
</body>
</html>
,
您可以尝试这样:
<!DOCTYPE html>
<html>
<head>
<title>Parcel Sandbox</title>
<meta charset="UTF-8" />
</head>
<body>
<form id="form">
<input type="text" id="first_length" name="first_length" />
<input type="text" id="second_length" name="second_length" />
<input type="submit" value="Submit" />
</form>
<script>
function logSubmit(event) {
event.preventDefault();
var first_length = document.getElementById("first_length").value;
var second_length = document.getElementById("second_length").value;
var final = solveforHyp(first_length,second_length);
console.log(final);
}
const form = document.getElementById("form");
form.addEventListener("submit",logSubmit);
function solveforHyp(a,b) {
var c = a * a + b * b;
return Math.sqrt(c);
}
</script>
</body>
</html>
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