Open page on specific tab using URL hash

Question

Admittedly I'm a little lost on this since I'm very new to hashes, but I think this might be a solution to my problem so I'm hoping someone here might have some more insight. I have a webpage with multiple "tabs" (a div that hides information until the button is clicked, and a div that hides all other information until the button is clicked) and I want to be able to open to a specific tab from different webpages.< ;/p>

This is the skeleton of the previous web page. When you navigate to the page regularly, the first div is visible by default.

<div id="first" class="commission">
content
</div>

<div id="second" class="commission" style="display:none;">
content
</div>

<div id="third" class="commission" style="display:none;">
content
</div>

On this page there are buttons that you can click to switch between these divs.

<button class="commissiontab" onclick="commissionType(event, 'first')">first</button>
<button class="commissiontab" onclick="commissionType(event, 'second')">Second</button>
<button class="commissiontab" onclick="commissionType(event, 'third')">Third</button>

The javascript to switch between these is:

function commissionType(evt, commissionName) {
  var i,commissiontab;
  var x = document.getElementsByClassName("commission");
  for (i = 0; i < x.length; i ) {
    x[i].style.display = "none";
  }
  commissiontab = document.getElementsByClassName("commissiontab");
  for (i = 0; i < x.length; i ) {
    commissiontab[i].className = commissiontab[i].className.replace(" selected", "");
  }
  window.scrollTo({ top: 0, behavior: 'smooth' });
  evt.currentTarget.className = " selected";
  document.getElementById(commissionName).style.display = "grid";
}

Somehow I want to have these buttons on a different page ("index.html"), but when you click on the "third" you are taken to a new page ("commissiontypes.html") "Third" instead of the default "First".

If there are other solutions besides using hashes, I'd love to hear about it, thanks for taking a closer look.

Answer 1

You can initially hide all elements using the 'commission' class and then show only one of them when the page loads based on location.hash. This way, commissiontypes.html (and commissiontypes.html#first) will show the first div, commissiontypes.html#second will show the second div, etc.

document.querySelectorAll('.commission').forEach(x => x.style.display = 'none');
const activeEl = document.querySelector(location.hash || '#first');
activeEl.style.display = '';

(Alternatively, you may also consider using query parameters to indicate this section.)