How to Use document.getElementById with Multiple IDs in JavaScript?

Question

i want to change the code of both the button after clicking it work fine when I use single id but when I use multiple id it did not work I am still learning js so any idea will be helpfull

const btn = document.getElementById('copy_btn','down_btn');
copy_btn.addEventListener('click', function handleClick() {
  btn.innerHTML = ` Copied`;
});
down_btn.addEventListener('click', function handleClick() {
  btn.innerHTML = ` Downloading`;
});

Abito Prakash · Answer

Here's an approach, define a function addClickHandlers which takes in an array of elements (each element has an id, icon and text) and then adds click handlers for each element.

const addClickHandlers = (ids) => {
  ids.forEach(({ id, icon, text }) => {
    const element = document.getElementById(id);
    element.addEventListener("click", function handleClick() {
      element.innerHTML = ` ${text}`;
    });
  });
};

addClickHandlers([
  { id: "copy_btn", icon: "akar-icons:copy", text: "Copied" },
  { id: "down_btn", icon: "ri:file-download-line", text: "Downloading" },
]);

UmairFarooq · Answer

The Hint is in the name getElementById "element" meaning singular. you can use getElementsByClassName or querySelectorAll.

but if they have different ID's then you have do it two times.

const downBtn = document.getElementById("down_btn");

const copyBtn = document.getElementById("copy_btn");

srilatha · Answer

document.getElementById() only supports one name at a time and only returns a single node not an array of nodes. You have several different options:

You could implement your own function that takes multiple ids and returns multiple elements.
You could use document.querySelectorAll() that allows you to specify multiple ids in a CSS selector string .
You could put a common class names on all those nodes and use document.getElementsByClassName() with a single class name.

Try like this:

document.getElementById("copy_btn down_btn");

How to Use document.getElementById with Multiple IDs in JavaScript?

3 Answers