如何使 h1 更改为输入中写入的内容?
How to make the h1 change to the what is written in an input?
我有一个作业,我必须将 h1 更改为输入中写入的任何内容。我必须通过使用 getElementByID 创建一个函数来做到这一点。
这是我目前所拥有的
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent=
}
</script>
</body>
</html>
您将值 (newtext
) 传递给了您的函数但从未使用它:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent=newtext;
}
</script>
</body>
</html>
尝试将您的脚本更改为:
function changeh1(newtext) {
document.getElementById("Header").innerText = newtext;
}
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent = newtext;
}
</script>
textContent API
可用于获取和设置节点的文本内容。在您的原始代码中,您没有设置要修改的节点的内容(header,h1)。要修复它,只需将它设置为您定义的回调函数的参数即可。在 DOM 中,您将 this.value
作为 newtext
的参数传递
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent = newtext
}
</script>
</body>
</html>
我有一个作业,我必须将 h1 更改为输入中写入的任何内容。我必须通过使用 getElementByID 创建一个函数来做到这一点。
这是我目前所拥有的
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent=
}
</script>
</body>
</html>
您将值 (newtext
) 传递给了您的函数但从未使用它:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent=newtext;
}
</script>
</body>
</html>
尝试将您的脚本更改为:
function changeh1(newtext) {
document.getElementById("Header").innerText = newtext;
}
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent = newtext;
}
</script>
textContent API
可用于获取和设置节点的文本内容。在您的原始代码中,您没有设置要修改的节点的内容(header,h1)。要修复它,只需将它设置为您定义的回调函数的参数即可。在 DOM 中,您将 this.value
作为 newtext
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Change Text</title>
</head>
<body>
<h1 id="Header">Change header</h1>
<p>Use the input to change the header.</p>
<input type="text" oninput="changeh1(this.value)" />
<script>
function changeh1(newtext) {
document.getElementById("Header").textContent = newtext
}
</script>
</body>
</html>