带有粘性标题的响应式引导表

Question

I have a table. The only CSS I am adding to the standard Bootstrap library is the following to implement the sticky header:

 .table-sticky th { background: #fff; position: sticky; top: -1px; z-index: 990; }

 <div class="table-responsive p-0 mt-2"> <table class="table table-sm table-striped table-hover table-sticky"> <thead> <tr> <th>#</th> <th>Header</th> <th>Header</th> <th>Header</th> <th>Header</th> </tr> </thead> <tbody> <tr> <td>1,001</td> <td>Lorem</td> <td>ipsum</td> <td>dolor</td> <td>sit</td> </tr> <tr> <td>1,002</td> <td>amet</td> <td>consectetur</td> <td>adipiscing</td> <td>elit</td> </tr> </tbody> </table> </div>

The sticky header worked until I wrapped the table in the div.table-responsive . How do I allow these to co-exist?

Answer 1

There's no way to co-exist a position: sticky inside a .table-responsive without re-implementing the latter.

My solution ended up to be using .table-responsive-sm to refuse this trade-off when a responsive table is certainly not needed.

Answer 2

without any additionnal CSS, you can fix table head by removing table-responsive from the div and adding class="bg-white sticky-top border-bottom" class to table tag. Like this

<div class="table">
  <table class="table">
   <thead>
    <tr>
     <th class="bg-white sticky-top border-bottom">FirstName</th>
     <th class="bg-white sticky-top border-bottom">LastName</th>
     <th class="bg-white sticky-top border-bottom">Class</th>
    </tr>
   </thead>
   <tbody>
     <tr>
       <td>John</td>
       <td>Cooker</td>
       <td>A1</td>
     </tr>
     <tr>
       <td>David</td>
       <td>Jeferson</td>
       <td>A2</td>
     </tr>
     ...
  </table>
</div>

Answer 3

In this case you need to code it yourself. Following JS will do the job:

var element = document.getElementById("fixed-thead");
var parentElement = element.parentElement;
window.addEventListener('scroll', () => {
    var coordinates = parentElement.getBoundingClientRect();
    if (coordinates.y < 0) {
        element.style.transform = 'translate3d(0, ' + (-coordinates.y) + 'px, 0)';
    } else {
        element.style.transform = 'translate3d(0,0,0)';
    }
}

And in your table mark thead with id="fixed-thead" like this:

<thead id="fixed-thead">

I use translate3d to enable hardware acceleration to make it smoother. If user uses wheel to scroll scroll event is triggering very ofter I recommend using debouncing of scroll events.

In case your table has column with fixed with you can use setting position: fixed and top: 0 instead of translate3d . But in case of a variable length translate3d is preferred.