用ID替换document.getElementById（“ id”）

发布于 2025-01-29 04:01:29 字数 538 浏览 2 评论 0原文

看来此代码运行良好。请在回答之前先尝试一下：

    <!DOCTYPE html>
<html>
<body>
<h2>JavaScript Variables</h2>
<p>In this example, x, y, and z are variables.</p>
<p id="demo"></p>
<script>
let x = 7;
let y = 45;
let z = x + y;
demo.innerHTML = "The value of z is: " + z;//please note this line
</script>
</body>
</html>

这是否意味着我可以替换document.getElementById（“ id”）。只有ID。???

原文

It seems that this code is working well. Please try it out before you answer:

    <!DOCTYPE html>
<html>
<body>
<h2>JavaScript Variables</h2>
<p>In this example, x, y, and z are variables.</p>
<p id="demo"></p>
<script>
let x = 7;
let y = 45;
let z = x + y;
demo.innerHTML = "The value of z is: " + z;//please note this line
</script>
</body>
</html>

Does this mean that I can replace document.getElementById("id"). with just id.???

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心房敞 2025-02-05 04:01:29

它正在工作，但被认为是遗产和不安全。

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禾厶谷欠 2025-02-05 04:01:29

看起来确实如此，并且也适用于嵌套元素...我想知道它是否在从HTML导入的其他JS文件上起作用。

<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Variables</h2>
<p>In this example, x, y, and z are variables.</p>
<p id="demo1">
  <p id="demo2"></p>
</p>
<p id="demo"></p>
<script>
let x = 7;
let y = 45;
let z = x + y;
demo.innerHTML = "The value of z is: " + z;//please note this line

demo2.innerHTML = "The value of z is: " + z;//please note this line
console.log(demo);
</script>
</body>
</html>

Seems like it does, and it works for nested elements also... I wonder though if it works on a different js file imported from the html.

<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Variables</h2>
<p>In this example, x, y, and z are variables.</p>
<p id="demo1">
  <p id="demo2"></p>
</p>
<p id="demo"></p>
<script>
let x = 7;
let y = 45;
let z = x + y;
demo.innerHTML = "The value of z is: " + z;//please note this line

demo2.innerHTML = "The value of z is: " + z;//please note this line
console.log(demo);
</script>
</body>
</html>

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