JavaScript issue with scrollTo() in Chrome

Chrome is so fast that your scrollTo() action fires before Chrome's default scroll to html anchor event.

Give it a tiny delay by using

setTimeout(function() {window.scrollTo(0, y);},1)

---

Or simply avoid using the actual element id as hash name

instead of using

test.htm#6

use

test.htm#link_6

then you can get the real id by doing something like

window.location.hash.split('_')[1]

Hope it helps.

I would suggest avoiding the use of JavaScript in favor of creating a dedicated anchor element and then offsetting it above the heading by at least your header height.

This has already been well described in https://stackoverflow.com/a/13184714/5951116.

Your code would then look something like this:

<div id='navi'>
  <a href='./test2.htm'>Menu</a>
</div>
<div id='main'>
  <div id='spacer'></div>
  <div class='article-wrapper'>
    <a class='anchor' id='1'></a>
    <h3>Heading 1</h3><p class='style1'></p>
  </div>
  <div class='article-wrapper'>
    <a class='anchor' id='2'></a>
    <h3>Heading 2</h3><p class='style1'></p>
  </div>
  ...
</div>

#navi {
  height: 50px;
}

#main a.anchor {
    display: block;
    position: relative;
    top: -50px;
    visibility: hidden;
}

Or use CSS variables to remove as much tight coupling as possible:

:root {
  --header-height: 50px;
}

#navi {
  height: var(--header-height);
}

#main a.anchor {
    display: block;
    position: relative;
    top: -var(--header-height);
    visibility: hidden;
}