Html – Fixed page header overlaps in-page anchors

anchorhtmlurl

If I have a non-scrolling header in an HTML page, fixed to the top, having a defined height:

Is there a way to use the URL anchor (the #fragment part) to have the browser scroll to a certain point in the page, but still respect the height of the fixed element without the help of JavaScript?

http://example.com/#bar

WRONG (but the common behavior):         CORRECT:
+---------------------------------+      +---------------------------------+
| BAR///////////////////// header |      | //////////////////////// header |
+---------------------------------+      +---------------------------------+
| Here is the rest of the Text    |      | BAR                             |
| ...                             |      |                                 |
| ...                             |      | Here is the rest of the Text    |
| ...                             |      | ...                             |
+---------------------------------+      +---------------------------------+

Best Answer

If you can’t or don’t want to set a new class, add a fixed-height ::before pseudo-element to the :target pseudo-class in CSS:

:target::before {
  content: "";
  display: block;
  height: 60px; /* fixed header height*/
  margin: -60px 0 0; /* negative fixed header height */
}

Or scroll the page relative to :target with jQuery:

var offset = $(':target').offset();
var scrollto = offset.top - 60; // minus fixed header height
$('html, body').animate({scrollTop:scrollto}, 0);

Related Solutions

Javascript – How to modify the URL without reloading the page

This can now be done in Chrome, Safari, Firefox 4+, and Internet Explorer 10pp4+!

See this question's answer for more information: Updating address bar with new URL without hash or reloading the page

Example:

 function processAjaxData(response, urlPath){
     document.getElementById("content").innerHTML = response.html;
     document.title = response.pageTitle;
     window.history.pushState({"html":response.html,"pageTitle":response.pageTitle},"", urlPath);
 }

You can then use window.onpopstate to detect the back/forward button navigation:

window.onpopstate = function(e){
    if(e.state){
        document.getElementById("content").innerHTML = e.state.html;
        document.title = e.state.pageTitle;
    }
};

For a more in-depth look at manipulating browser history, see this MDN article.

Html – CSS horizontal centering of a fixed div

The answers here are outdated. Now you can easily use a CSS3 transform without hardcoding a margin. This works on all elements, including elements with no width or dynamic width.

Horizontal center:

left: 50%;
transform: translateX(-50%);

Vertical center:

top: 50%;
transform: translateY(-50%);

Both horizontal and vertical:

left: 50%;
top: 50%;
transform: translate(-50%, -50%);

Compatibility is not an issue: http://caniuse.com/#feat=transforms2d

Best Answer

Related Solutions

Javascript – How to modify the URL without reloading the page

Html – CSS horizontal centering of a fixed div

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