我的代码可以在 codepen 上运行,但不能在我的浏览器上运行。我想 getelementbyid 然后是控制台上的那个元素
my code is working on codepen but not in my browser. i wanted to getelementbyid and then then that element on console
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Assignment 4</title>
<script src="script.js"></script>
</head>
<body>
<h1>Biryani</h1>
<h2 id="hello">Rohan</h2>
<p>Biryani is Pakistan's special dish. Main Ingredients are rice and chicken.</p>
</body>
</html>
script.js
<-- 该脚本用于通过id“hello”获取元素,然后显示在控制台上。-->
var myname = document.getElementById("hello");
console.log(myname.innerHTML);
const el = document.querySelector('h2');
el.textContent = 'Assignment 4';
您应该在元素定义下方包含 js。
浏览器正在从上到下编译 html 个脚本。如果您在定义的所有元素之前包含 js 代码,那么什么也抓不到并且它 returns 错误。
...
// your elements are defined here.
<script src="script.js"></script>
</body>
代码正确。您只需要在关闭 body 标签之前移动您的脚本标签。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Assignment 4</title>
</head>
<body>
<h1>Biryani</h1>
<h2 id="hello">Rohan</h2>
<p>
Biryani is Pakistan's special dish. Main Ingredients are rice and chicken.
</p>
<script src="./script.js"></script>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Assignment 4</title>
<script src="script.js"></script>
</head>
<body>
<h1>Biryani</h1>
<h2 id="hello">Rohan</h2>
<p>Biryani is Pakistan's special dish. Main Ingredients are rice and chicken.</p>
</body>
</html>
script.js <-- 该脚本用于通过id“hello”获取元素,然后显示在控制台上。-->
var myname = document.getElementById("hello");
console.log(myname.innerHTML);
const el = document.querySelector('h2');
el.textContent = 'Assignment 4';
您应该在元素定义下方包含 js。 浏览器正在从上到下编译 html 个脚本。如果您在定义的所有元素之前包含 js 代码,那么什么也抓不到并且它 returns 错误。
...
// your elements are defined here.
<script src="script.js"></script>
</body>
代码正确。您只需要在关闭 body 标签之前移动您的脚本标签。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<title>Assignment 4</title>
</head>
<body>
<h1>Biryani</h1>
<h2 id="hello">Rohan</h2>
<p>
Biryani is Pakistan's special dish. Main Ingredients are rice and chicken.
</p>
<script src="./script.js"></script>
</body>
</html>