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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>web design inspiration</title>
     
<script src="https://unpkg.com/ionicons@5.0.0/dist/ionicons.js"></script>

<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css">
 <style>
    @import url("https://fonts.googleapis.com/css?family=Lato:300,400,400i");

body {
  margin:0;
  padding:0;
  font-family: Lato, sans-serif;
}

/* ICON BAR */
.icon-bar {
  width: 100%;
  display: flex;
}

.icon-bar a {
  flex-grow: 1;
  text-align: center;
  padding: 0.333333em 0;
  transition: all 0.3s ease;
  color: hsl(182, 25%, 96%);
  font-size: 2.25em;
  background: #333;
}

.icon-bar a:hover {
  background-color: hsl(0, 0%, 16%);
    color: white;
}

.icon-bar .active {
  background-color: white;
    color: black;
}
.icon-bar .active:hover {
   color: white;
}

/* TOOLTIPS */
/* Tooltip container */
.tooltip {
  position: relative;
  display: inline-block;
}

/* Tooltip text */
.tooltip .tooltiptext {
  width: 100%;
  text-align: center;
  padding:  0.3em 0;
  font-size: 0.5em;
  color: hsl(0, 0%, 16%); 
  position: absolute;
  z-index: 1;
  top: 100%;
  left: 0%; 
  opacity: 0;
  transition: opacity 0.3s ease;
}
.active .tooltiptext { color: hsl(182, 25%, 50%); }

/* Show the tooltip text when you mouse over the tooltip container */
.tooltip:hover .tooltiptext {
  opacity: 1;
}

/* SEARCH FORM */
.search-form { 
  opacity: 0;
  position: absolute;
  width: 100%;
  max-width: 32em; 
  right: 0%; 
  background: #333; 
  padding: 1em;
  box-sizing: border-box;
  z-index: 10;
  transition: all 0.3s ease;
}
.search-form input {
  width: 95%;
  font-size: 1.4em;
  padding: 0.4em;
  color: hsl(0, 0%, 33%);
    border-radius: 50px;
    border: 1px solid #333;
}
.search-form input:focus {
  outline: none;
}

/* MEDIA QUERy (icon bar, tooltips, search form) */ 
@media screen and (max-width: 47.9375em) {
  .icon-bar a { font-size: 1.75em; }
  .tooltip .tooltiptext { font-size: 0.55em; }
  .search-form { max-width: 26.25em; }
  .search-form input { font-size: 1.2em; padding: 0.3em; }
}

/* HERO AREA */
.hero {
/* 	background: #f2f2f2; */
  background:url(watch.jpg);
  height: 60vw;
  display: flex;
  color:hsl(182, 25%, 50%);
  transition: height 0.3s ease;
}
 
/* MEDIA QUERY (hero area) */
@media screen and (max-width: 47.9375em) {
/* 	.hero-content h2 { font-size: 7vw; } */
/* 	.hero-content h3 { font-size: 3vw; } */
}
    
    
    </style>
</head>
<body>
 
<header>
  
<div class="icon-bar">
  <a class="active tooltip" href="#">
        <i class="fa fa-house-damage"></i>
    <span class="tooltiptext">Home</span>
  </a> 
  <a class="tooltip" href="#">
    <i class="fab fa-apple"></i>
    <span class="tooltiptext">MacOS</span>
  </a> 
  <a class="tooltip" href="#">
    <i class="fab fa-windows"></i>
    <span class="tooltiptext">Windows</span>
  </a>
  <a class="tooltip" href="#">
    <i class="fab fa-android"></i>
    <span class="tooltiptext">Android</span>
  </a> 
  <a class="tooltip" href="#">
    <i class="fab fa-ubuntu"></i>
    <span class="tooltiptext">Ubuntu</span>
  </a> 
  <a class="tooltip search" href="#">
    <i class="fa fa-search"></i>
    <span class="tooltiptext">Search</span>
  </a> 
</div>
  
<div class="search-form"><input type="text" placeholder="Enter search term..."></div>
  
</header>
  
<div class="hero">
   
</div>
<script>
    // get icon bar links and search form
var els = document.querySelectorAll( '.icon-bar a' );
var searchForm = document.querySelector( '.search-form' );

els.forEach( function( el ) {
  
  el.onclick = function() {
    
    	// change active icon
    document.querySelector ('.active' ).classList.remove( 'active' );
        el.classList.add( 'active' );
    
    // check if search icon has been clicked
    if ( el.classList.contains( 'search' ) ) {
      
      searchForm.children[0].focus(); // put focus on text input
      
      // toggle search form
      if ( searchForm.style.opacity == 0 ) { 
        searchForm.style.opacity = 1;
      } else {
        searchForm.style.opacity = 0;
      }
      
    } else { // another icon has been clicked
      
      searchForm.style.opacity = 0;
      searchForm.children[0].value = '';
      
    }
    
    }
  
});
    
    
</script>
</body>  
</html>

在线演示? 让链接同时具备两种打开方式