彩色叠加使用Box-Shadow

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html

css

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html

css

/* pokemone pictures */

.pokemon {
  width: 200px;
  height: 200px;
  /* center content using flex box */
  display: flex;
  justify-content: center;
  align-items: center;
  /* overlay */
  box-shadow: 0 0 0 100px inset, 0 0 5px grey;
  /* hover out transition */
  transition: box-shadow 1s;
  float: left;
  margin: 10px;
}

/* pokemone names */

.pokemon::after {
  width: 80%;
  height: 80%;
  display: block;
  white-space: pre;
  font: 15pt 'sigmar one';
  color: white;
  border: 2px solid;
  text-align: center;
  /* center content using flex box */
  display: flex;
  justify-content: center;
  align-items: center;
  /* hover out transition */
  transition: opacity 1s .5s;
}

/* reveal pokemone picture on hover */

.pokemon:hover {
  box-shadow: 0 0 0 5px inset, 0 0 5px grey, 0 0 10px grey inset;
  transition: box-shadow 1s;
}

/* hide pokemone name on hover */

.pokemon:hover::after {
  opacity: 0;
  transition: opacity .5s;
}

#bulbasaur {
  background-image: url(http://www.jq22.com/demo/box-slider201801222346/img/1.jpg);
  color: rgba(71, 121, 94, .9);
}

#bulbasaur::after {
  content: 'Bulbasaur';
}

#charmander {
  background-image: url(http://www.jq22.com/demo/box-slider201801222346/img/2.jpg);
  color: rgba(221, 86, 63, .9);
}

#charmander::after {
  content: 'Charmander'
}

#squirtle {
  background-image: url(http://www.jq22.com/demo/box-slider201801222346/img/3.jpg);
  color: rgba(65, 102, 114, .9);
}

#squirtle::after {
  content: 'Squirtle'
}

#pikachu {
  background-image: url(http://www.jq22.com/demo/box-slider201801222346/img/4.jpg);
  color: rgba(179, 152, 98, .9);
}

#pikachu::after {
  content: 'Pikachu'
}

#wrapper {
  width: 500px;
  height: 500px;
  margin:  auto;
}

JavaScript

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