How to imitate bootstrap's tooltip without bootstrap

Working with my next project, I had to come up with an idea to imitate tooltip bootstrap style without bootstrap. So, I did some research and found excellent resource. This example gave the idea how create fully-customized tooltip for my project.  Here's an example how I used the sample:

HTML:

<div id="top-menu-bar-buttons">

                  <div class="button1 icon-location-left"><button class="btn-secondary tooltips" type="button">Cancel<span class="width60">Cancel</span></button></div>

                  <div class="button2 icon-location-left"><button class="btn-secondary tooltips" type="button">Preview<span class="width60">Preview</span></button></div>

                  <div class="button3 icon-location-left"><button class="btn-primary tooltips" type="button"><div id="top-menu-bar-button3-text">Review Job</div><i class="fa fa-chevron-right fa-lg"></i><span class="width75">Review Job</span></button></div>

</div>

CSS:

button.tooltips {

  position: relative;

  display: inline;

}

button.tooltips span {

  position: absolute;

  color: #FFFFFF;

  background: #000000;

  height: 19px;

  line-height: 18px;

  text-align: center;

  visibility: hidden;

  border-radius: 6px;

  font-size: 12px;

  font-weight: normal;

}

button.tooltips span:after {

  content: '';

  position: absolute;

  bottom: 100%;

  left: 50%;

  margin-left: -8px;

  width: 0; height: 0;

  border-bottom: 8px solid #000000;

  border-right: 8px solid transparent;

  border-left: 8px solid transparent;

}

button:hover.tooltips span {

  visibility: visible;

  opacity: 0.8;

  top: 40px;

  bottom: 30px;

  left: 100%;

  margin-left: -76px;

  z-index: 999;

}

.width60 {

    width: 60px;

}

.width75 {

    width: 75px;

}