Is it possible to click one button and simultaneously click another element. Like I click a button to show an image and simultaneously let something else appear which would also appear when clicking on it
It's totally possible. You have to get the click event of the element, and you can do whatever you want.
Example:
<button id="button">I am a button</button>
<div id="anotherElement"></div>
<script>
const button = document.getElementById('button');
const anotherElement = document.getElementById('anotherElement');
button.addEventListener('click', () => {
// do whatever you want here
anotherElement.click();
});
</script>
As our friend Said says, is possible, just I think if would be better if you name classes instead of ID because is a better practice
<button class="button">Do something here</button>
<button class="button">And here</button>
<script>
const button = document.getElementsByClassName ('button');
button.addEventListener('click', () => {
// do whatever you want here
});
</script>