我如何在 Javascript 中转换元素 id 中的变量值

Question

If I declare value in A this value I want to access as id in B through getElementById() . Can I use this method?

var A = 10;
var B = doument.getElementbyId(A)
console.log(B)

Answer 1

Case-sensitivity matters in JavaScript.

1. You have a spelling error in "doument" (missing a "c")
2. You have a grammatical error in "getElementbyId" (The "b" should be capitalized)
3. The id param of getElementById should be a case-sensitive string

You can convert the integer to a string by calling toString() on it.

 var A = 10; var B = document.getElementById(A.toString()) console.log(B)

 <div id="10">Hello World</div>

Answer 2

That's not how you are supposed to do that. document.getElementById returns the HTML element with that particular id.

This is done using Objects .

Try this:

var A = 10;

var B = {
    id: A
}

console.log(B.id);