HTML美观的搜索框怎么做?

一、"融情于景"1.0

html 复制代码
<form action="" class="search-bar">
  <input type="search" name="search" pattern=".*\S.*" required>
  <button class="search-btn" type="submit">
    <span>Search</span>
  </button>
</form>
css 复制代码
* {
  border: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
:root {
  font-size: calc(16px + (24 - 16)*(100vw - 320px)/(1920 - 320));
}
body, button, input {
  font: 1em Hind, sans-serif;
  line-height: 1.5em;
}
body, input {
  color: #171717;
}
body, .search-bar {
  display: flex;
}
body {
  background: #f1f1f1;
  height: 100vh;
}
.search-bar input,
.search-btn, 
.search-btn:before, 
.search-btn:after {
  transition: all 0.25s ease-out;
}
.search-bar input,
.search-btn {
  width: 3em;
  height: 3em;
}
.search-bar input:invalid:not(:focus),
.search-btn {
  cursor: pointer;
}
.search-bar,
.search-bar input:focus,
.search-bar input:valid  {
  width: 100%;
}
.search-bar input:focus,
.search-bar input:not(:focus) + .search-btn:focus {
  outline: transparent;
}
.search-bar {
  margin: auto;
  padding: 1.5em;
  justify-content: center;
  max-width: 30em;
}
.search-bar input {
  background: transparent;
  border-radius: 1.5em;
  box-shadow: 0 0 0 0.4em #171717 inset;
  padding: 0.75em;
  transform: translate(0.5em,0.5em) scale(0.5);
  transform-origin: 100% 0;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}
.search-bar input::-webkit-search-decoration {
  -webkit-appearance: none;
}
.search-bar input:focus,
.search-bar input:valid {
  background: #fff;
  border-radius: 0.375em 0 0 0.375em;
  box-shadow: 0 0 0 0.1em #d9d9d9 inset;
  transform: scale(1);
}
.search-btn {
  background: #171717;
  border-radius: 0 0.75em 0.75em 0 / 0 1.5em 1.5em 0;
  padding: 0.75em;
  position: relative;
  transform: translate(0.25em,0.25em) rotate(45deg) scale(0.25,0.125);
  transform-origin: 0 50%;
}
.search-btn:before, 
.search-btn:after {
  content: "";
  display: block;
  opacity: 0;
  position: absolute;
}
.search-btn:before {
  border-radius: 50%;
  box-shadow: 0 0 0 0.2em #f1f1f1 inset;
  top: 0.75em;
  left: 0.75em;
  width: 1.2em;
  height: 1.2em;
}
.search-btn:after {
  background: #f1f1f1;
  border-radius: 0 0.25em 0.25em 0;
  top: 51%;
  left: 51%;
  width: 0.75em;
  height: 0.25em;
  transform: translate(0.2em,0) rotate(45deg);
  transform-origin: 0 50%;
}
.search-btn span {
  display: inline-block;
  overflow: hidden;
  width: 1px;
  height: 1px;
}

/* Active state */
.search-bar input:focus + .search-btn,
.search-bar input:valid + .search-btn {
  background: #2762f3;
  border-radius: 0 0.375em 0.375em 0;
  transform: scale(1);
}
.search-bar input:focus + .search-btn:before, 
.search-bar input:focus + .search-btn:after,
.search-bar input:valid + .search-btn:before, 
.search-bar input:valid + .search-btn:after {
  opacity: 1;
}
.search-bar input:focus + .search-btn:hover,
.search-bar input:valid + .search-btn:hover,
.search-bar input:valid:not(:focus) + .search-btn:focus {
  background: #0c48db;
}
.search-bar input:focus + .search-btn:active,
.search-bar input:valid + .search-btn:active {
  transform: translateY(1px);
}

@media screen and (prefers-color-scheme: dark) {
  body, input {
    color: #f1f1f1;
  }
  body {
    background: #171717;
  }
  .search-bar input {
    box-shadow: 0 0 0 0.4em #f1f1f1 inset;
  }
  .search-bar input:focus,
  .search-bar input:valid {
    background: #3d3d3d;
    box-shadow: 0 0 0 0.1em #3d3d3d inset;
  }
  .search-btn {
    background: #f1f1f1;
  }
}

二、"融情于景"2.0

html 复制代码
<div class="container">
  <input type="text" placeholder="Search...">
  <div class="search"></div>
</div>
css 复制代码
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
}

body {
  background: #252525;
}

.container {
  position: absolute;
  margin: auto;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  width: 300px;
  height: 100px;
}
.container .search {
  position: absolute;
  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 80px;
  height: 80px;
  background: crimson;
  border-radius: 50%;
  transition: all 1s;
  z-index: 4;
  box-shadow: 0 0 25px 0 rgba(0, 0, 0, 0.4);
}
.container .search:hover {
  cursor: pointer;
}
.container .search::before {
  content: "";
  position: absolute;
  margin: auto;
  top: 22px;
  right: 0;
  bottom: 0;
  left: 22px;
  width: 12px;
  height: 2px;
  background: white;
  transform: rotate(45deg);
  transition: all 0.5s;
}
.container .search::after {
  content: "";
  position: absolute;
  margin: auto;
  top: -5px;
  right: 0;
  bottom: 0;
  left: -5px;
  width: 25px;
  height: 25px;
  border-radius: 50%;
  border: 2px solid white;
  transition: all 0.5s;
}
.container input {
  font-family: "Inconsolata", monospace;
  position: absolute;
  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 50px;
  height: 50px;
  outline: none;
  border: none;
  background: crimson;
  color: white;
  text-shadow: 0 0 10px crimson;
  padding: 0 80px 0 20px;
  border-radius: 30px;
  box-shadow: 0 0 25px 0 crimson, 0 20px 25px 0 rgba(0, 0, 0, 0.2);
  transition: all 1s;
  opacity: 0;
  z-index: 5;
  font-weight: bolder;
  letter-spacing: 0.1em;
}
.container input:hover {
  cursor: pointer;
}
.container input:focus {
  width: 300px;
  opacity: 1;
  cursor: text;
}
.container input:focus ~ .search {
  right: -250px;
  background: #151515;
  z-index: 6;
}
.container input:focus ~ .search::before {
  top: 0;
  left: 0;
  width: 25px;
}
.container input:focus ~ .search::after {
  top: 0;
  left: 0;
  width: 25px;
  height: 2px;
  border: none;
  background: white;
  border-radius: 0%;
  transform: rotate(-45deg);
}
.container input::placeholder {
  color: white;
  opacity: 0.5;
  font-weight: bolder;
}
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