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CSS

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JavaScript

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Babel includes JSX processing.

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HTML 

              
                <div class="widget-wrap">
  <div id="grid"></div>
  <h1>CSS CUSTOM TOOLTIP</h1>
  
  Lorem ipsum dolor sit amet,
  <i data-tooltip="Top Tip" class="top">Demo - Top</i>
  consectetur adipiscing elit.
  <i data-tooltip="Bottom Tip" class="bottom">Demo - Bottom</i>
  Ut fringilla placerat accumsan.
  <i data-tooltip="Left Tip" class="left">Demo - Left</i>
  Maecenas elit dui, consectetur nec justo id, accumsan vestibulum mi.
  <i data-tooltip="Right Tip" class="right">Demo - Right</i>
  
  <!-- (X) VISIT CODE-BOXX -->
  <div id="code-boxx">
    Visit
    <a href="https://code-boxx.com/css-custom-tooltip/"
       target="_blank">
      Code Boxx
    </a> for more details.
  </div>
</div>
!

CSS 

              
                /* (A) BUILD TOOLTIP USING BEFORE PSEUDO-CLASS */
[data-tooltip]::before {
  content: attr(data-tooltip);
}

/* (B) POSITION TOOLTIP */
[data-tooltip] {
  position: relative;
  display: inline-block;
}
[data-tooltip]::before {
  position: absolute;
  z-index: 999;
}
[data-tooltip].top::before {
  bottom: 100%;
  margin-bottom: 10px;
}
[data-tooltip].bottom::before {
  top: 100%;
  margin-top: 10px;
}
[data-tooltip].left::before {
  right: 100%;
  margin-right: 10px;
}
[data-tooltip].right::before {
  left: 100%;
  margin-left: 10px;
}

/* (C) SHOW TOOLTIP ONLY ON HOVER */
[data-tooltip]::before {
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.5s;
}
[data-tooltip]:hover::before {
  visibility: visible;
  opacity: 1;
}

/* (D) STYLE THE TOOLTIP */
[data-tooltip] { background: #fea; }
[data-tooltip]::before {
  background: #000;
  color: #fff;
  padding: 5px;
  min-width: 100px;
  text-align: center;
}

/* (X) DOES NOT MATTER */
/* PAGE & BODY */
* {
  font-family: arial, sans-serif;
  box-sizing: border-box;
}
body {
  display: flex;
  align-items: center; justify-content: center;
  min-height: 100vh;
  background-image: url(https://images.unsplash.com/photo-1600172454284-934feca24ccd?crop=entropy&cs=srgb&fm=jpg&ixid=MnwxNDU4OXwwfDF8cmFuZG9tfHx8fHx8fHx8MTY0NjUzNTA0NA&ixlib=rb-1.2.1&q=85);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}

/* WIDGET */
.widget-wrap {
  max-width: 500px;
  padding: 30px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.4);
}

/* SVG */
#grid {
  width: 100%; height:100px;
  background-image: url('data:image/svg+xml;utf8,<svg viewBox="0 0 512 512" width="100" xmlns="http://www.w3.org/2000/svg"><path d="M256 8C119.043 8 8 119.083 8 256c0 136.997 111.043 248 248 248s248-111.003 248-248C504 119.083 392.957 8 256 8zm0 110c23.196 0 42 18.804 42 42s-18.804 42-42 42-42-18.804-42-42 18.804-42 42-42zm56 254c0 6.627-5.373 12-12 12h-88c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h12v-64h-12c-6.627 0-12-5.373-12-12v-24c0-6.627 5.373-12 12-12h64c6.627 0 12 5.373 12 12v100h12c6.627 0 12 5.373 12 12v24z" /></svg>');
  background-repeat: no-repeat;
  background-position: center;
}

/* FOOTER */
#code-boxx {
  font-weight: 600;
  margin-top: 50px;
}
#code-boxx a {
  display: inline-block;
  padding: 5px;
  text-decoration: none;
  background: #b90a0a;
  color: #fff;
}
#code-boxx , h1 { text-align: center; }
!

JS
!
999px

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