Automatically show bottom instead of top of an HTML page

Question

I would like to show users who load the site the bottom of the page and not — as normally — the top.

More specific example: I have an iframe element which points to a site with some text. The bottom of this site should automatically be shown.

How can I realize this?

Answer 1

Use flex and its flex-direction: column-reverse;

html, body {
  margin: 0;
}
.wrapper {
  display: flex;
  flex-direction: column-reverse;
  max-height: 100vh;
  overflow: auto;
}

<div class="wrapper">
  Top<br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Long content <br><br><br>
  Bottom
</div>

Side note:

This solution seems to still has some flaws not work properly in Firefox/Edge/IE11 (they don't show the scroll bar, though content start at bottom), so here is a fix for them until they start behave

The below code snippet is taken and cleaned up from another answer of mine, at this post, where there are a few more options to handle this issue.

/* fix for IE/Edge/Firefox */
var isWebkit = ('WebkitAppearance' in document.documentElement.style);
var isEdge = ('-ms-accelerator' in document.documentElement.style);
function updateScroll(el){
  el.scrollTop = el.scrollHeight;
}
if (!isWebkit || isEdge) {
  updateScroll(document.querySelector('.content'));
}

html, body {
  margin:0;
}
.wrapper {
  display: flex;
  flex-direction: column-reverse;
  max-height: 100vh;
  overflow: auto;  
}

/* fix for hidden scrollbar in IE/Edge/Firefox */
.content { overflow: auto; }
@media screen and (-webkit-min-device-pixel-ratio:0) {
  .content { overflow: visible; }
  @supports (-ms-accelerator:true) { .content { overflow: auto; } }
}

<div class="wrapper">
  <div class="content">
    Top<br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Long content <br><br><br>
    Bottom
  </div>
</div>