I'm having trouble adjusting the inner HTML of specific "div" elements using JavaScript. When I try to change the HTML of a single element in an array, it ends up changing all elements instead.
let div_length = 2;
const divs = new Array(div_length).fill(document.createElement("div"));
divs[0].innerHTML = "Hello";
console.log(divs[0].innerHTML); // Hello
console.log(divs[1].innerHTML); // Hello
Is there a way to modify this code so that it only updates the HTML of the first element?
When the fill method is given an object as a parameter, it will duplicate the reference and populate the array with references to that object.
To achieve this, utilize Array.from()
Array.from({length:bs_length}, () => document.createElement("div"));
The length of your array, bs_length, is actually all the same elements. It's important to grasp the distinction between primitive/immutable values (such as 1, true, "hello") and objects (like [1, 2, 3], {foo: "bar"}, or DOM elements) in OOP languages. When using a method like fill with an element, you're essentially populating the array with references to that single element rather than creating distinct copies. The solution provided by @guest271314 offers a way to populate the array with new elements using a concise one-liner, which is akin to performing:
let bs_divs = new Array(bs_length);
for (let i = 0; i < bs_length; i++) {
bs_divs[i] = document.createElement("div");
}
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