Popovers are used to display additional content when a user hovers over or clicks on an element, and they are similar to tooltips, except that the content contained in them can be much richer. Just as with tooltips, Bootstrap 4 relies on the third-party plugin Popper.js to position popovers.
Similar to tooltips, popover elements are denoted using the data-toggle attribute set to popover. The title attribute is used to denote the popover's title, while the data-content attribute should point to its content: top, bottom, left, and right:
<a href="#"
data-toggle="popover"
title="My popover title"
data-content="My popover content">
Click me
</a>As there is some overhead involved in initializing the popovers, Bootstrap does not initialize them automatically. As such, we must do so ourselves:
$('[data-toggle="popover"]').popover()
Figure 5.13: A sample popover created using Popper.js and Bootstrap 4; the popover appears when the "Click me" link is pressed
Using...