bootstrap popover: advanced positioning

问题:

I'm trying to position a twitter-bootstrap popover for a trigger that sits on the far top-right corner of a 960px wide web page. Ideally, I'd position it on the bottom and move the arrow with CSS (so the arrow is on the top-right of the popover).

Unfortunately the 'placement':'bottom' positioning is not enough, since it will center it below the trigger.

I'm looking for solution that will place the popover statically below and on the left of the trigger. I read tons of questions but couldn't find any.

Hints?

回答1:

This works. Tested.

.popover {
    top: 71px !important;
    left: 379px !important;
}

回答2:

A Simple Solution

Simply add an attribute to your popover buddy!

---

Fiddle

See my fiddle if you're in a hurry

---

Main Goal

We want to add an ID or a class to a particular popover so that we may customize it the way we want via CSS.

Please note that we don't want to customize all popovers! This is terrible idea (basically, as of today, accepted answer is a TERRIBLE idea..)

---

Example

Here is a simple example - display the popover like this:

html:

<button id="my-button" data-toggle="popover">My Button</button>

js:

// We add the id 'my-popover'
$("#my-button").popover({
    html : true,
    placement: 'bottom'
}).data('bs.popover').tip().attr('id', 'my-popover');

css:

#my-popover {
    left: -169px!important;
}

#my-popover .arrow {
    left: 90%
}

回答3:

I've created a jQuery plugin that provides 4 additonal placements: topLeft, topRight, bottomLeft, bottomRight

You just include either the minified js or unminified js and have the matching css (minified vs unminified) in the same folder.

https://github.com/dkleehammer/bootstrap-popover-extra-placements

回答4:

Popover's Viewport

The best solution that will work for you in all occassions, especially if your website has a fluid width, is to use the viewport option of the Bootstrap Popover.

This will make the popover take width inside a selector you have assigned. So if the trigger button is on the right of that container, the bootstrap arrow will also appear on the right while the popover is inside that area. See jsfiddle.net

You can also use padding if you want some space from the edge of container. If you want no padding just use viewport: '.container'

$('#popoverButton').popover({
   container: 'body',
   placement: "bottom",
   html: true,   
   viewport: { selector: '.container', padding: 5 },
   content: '<strong>Hello Wooooooooooooooooooooooorld</strong>'
 });

in the following html example:

<div class="container">
   <button type="button" id="popoverButton">Click Me!</button>
</div>

and with CSS:

.container {
  text-align:right;
  width: 100px;
  padding: 20px;
  background: blue;
}

回答5:

I solved this (partially) by adding some lines of code to the bootstrap css library. You will have to modify tooltip.js, tooltip.less, popover.js, and popover.less

in tooltip.js, add this case in the switch statement there

case 'bottom-right':
          tp = {top: pos.top + pos.height, left: pos.left + pos.width}
          break

in tooltip.less, add these two lines in .tooltip{}

&.bottom-right { margin-top:   -2px; }
&.bottom-right .tooltip-arrow { #popoverArrow > .bottom(); }

do the same in popover.js and popover.less. Basically, wherever you find code where other positions are mentioned, add your desired position accordingly.

As I mentioned earlier, this solved the problem partially. My problem now is that the little arrow of the popover does not appear.

note: if you want to have the popover in top-left, use top attribute of '.top' and left attribute of '.left'

回答6:

To bootstrap 3.0.0:

.popover{ right:0!important; }

And modify too

.popover { max-width:WWWpx!important; } 

where WWW is your correct max-width to show your popover content.

回答7:

I had to make the following changes for the popover to position below with some overlap and to show the arrow correctly.

js

case 'bottom-right':  
    tp = {top: pos.top + pos.height + 10, left: pos.left + pos.width - 40}  
    break  

css

    .popover.bottom-right .arrow {  
      left: 20px; /* MODIFIED */  
      margin-left: -11px;  
      border-top-width: 0;  
      border-bottom-color: #999;  
      border-bottom-color: rgba(0, 0, 0, 0.25);  
      top: -11px;  
    }  
    .popover.bottom-right .arrow:after {  
      top: 1px;  
      margin-left: -10px;  
      border-top-width: 0;  
      border-bottom-color: #ffffff;  
    }  

This can be extended for arrow locations elsewhere .. enjoy!

回答8:

Sure you can. Fortunately there is a clean way to do that and it is in the Bootstrap popover / tooltip documentation as well.

let mySpecialTooltip = $('#mySpecialTooltip); 
mySpecialTooltip.tooltip({
 container: 'body',
 placement: 'bottom',
 html: true,
 template: '<div class="tooltip your-custom-class" role="tooltip"><div class="arrow"></div><div class="tooltip-inner"></div></div>'
}); 

in your css file:-

.your-custom-class {
 bottom: your value;
}

Make sure to add the template in bootstrap's tooltip documentation and add your custom class name and style it using css

And, that's it. You can find more about this on https://getbootstrap.com/docs/4.0/components/tooltips/

回答9:

Maybe you don't need this logic for a responsive behavior.

E.g.

placement: 'auto left'

Bootstrap 3 has auto value for placement. Bootstrap doc:

When "auto" is specified, it will dynamically reorient the tooltip. For example, if placement is "auto left", the tooltip will display to the left when possible, otherwise it will display right.

回答10:

If you take a look at bootstrap source codes, you will notice that position can be modified using margin.

So, first you should change popover template to add own css class to not get in conflict with other popovers:

$(".trigger").popover({
  html: true,
  placement: 'bottom',
  trigger: 'click',
  template: '<div class="popover popover--topright" role="tooltip"><div class="arrow"></div><h3 class="popover-title"></h3><div class="popover-content"></div></div>'
});

Then using css you can easily shift popover position:

.popover.popover--topright {
  /* margin-top: 0px; // Use to change vertical position */
  margin-right: 40px; /* Use to change horizontal position */
}
.popover.popover--topright .arrow {
  left: 88% !important; /* fix arrow position */
}

This solution would not influence other popovers you have. Same solution can be used on tooltips as well because popover class inherit from tooltip class.

Here's a simple jsFiddle