jQuery平滑滚动的粘性导航菜单

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html

css

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html

css

/*** Mixins & Default Styles ***/
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  overflow-x: hidden;
  overflow-y: scroll;
}

/*** Color Variables ***/
/*** Centering Hack ***/
/*** Header Styles ***/
header {
  width: 100vw;
  height: 100vh;
  background: #5661f2;
  display: flex;
}

/*** Navigation Styles ***/
nav {
  width: 100vw;
  height: 160px;
  background: #46b2f0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  position: fixed;
  z-index: 10;
  transition: all 0.3s;
}
nav.navShadow {
  box-shadow: 0 4px 30px -5px rgba(0, 0, 0, 0.2);
  height: 100px;
}
nav.navShadow #word-mark {
  opacity: 0;
}

#brand,
#menu,
ul {
  display: flex;
  align-items: center;
}

#brand {
  padding-left: 40px;
}

#logo {
  width: 55px;
  height: 55px;
  background: #fff;
  border-radius: 50%;
  cursor: pointer;
}

#word-mark {
  width: 120px;
  height: 20px;
  background: #fff;
  border-radius: 90px;
  margin-left: 20px;
  opacity: 1;
  transition: all 0.3s;
}

/*** Menu Styles ***/
#menu {
  justify-content: flex-end;
  padding-right: 40px;
}

li {
  margin-left: 20px;
}
li a {
  width: 80px;
  height: 20px;
  background: #fff;
  display: block;
  border-radius: 90px;
}

#menu-toggle {
  width: 55px;
  height: 55px;
  background: #2ea8ee;
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: 50%;
  cursor: pointer;
  display: none;
}
#menu-toggle:hover .bar {
  width: 25px;
}
#menu-toggle.closeMenu .bar {
  width: 25px;
}
#menu-toggle.closeMenu .bar:first-child {
  transform: translateY(7px) rotate(45deg);
}
#menu-toggle.closeMenu .bar:nth-child(2) {
  transform: scale(0);
}
#menu-toggle.closeMenu .bar:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

.bar {
  width: 25px;
  height: 2px;
  background: #fff;
  transition: 0.3s ease-in-out;
}
.bar:nth-child(2) {
  width: 20px;
  margin: 5px 0;
}
.bar:last-child {
  width: 15px;
}

/*** Hero Section Styles ***/
#hero-section {
  width: 100vw;
  height: calc(100vh - 160px);
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 160px;
}

#head-line {
  width: 520px;
  height: 30px;
  background: #fff;
  border-radius: 90px;
  position: relative;
}
#head-line:before, #head-line:after {
  content: "";
  height: 30px;
  border-radius: 90px;
}
#head-line:before {
  width: 360px;
  background: #fff;
  position: absolute;
  top: -60px;
  left: 50%;
  transform: translate(-50%, 0);
}
#head-line:after {
  width: 200px;
  background: #fff;
  position: absolute;
  left: 50%;
  bottom: -60px;
  transform: translate(-50%, 0);
}

/*** Section Styles ***/
section {
  width: 100vw;
  height: calc(100vh - 100px);
  display: flex;
  justify-content: center;
}
section:nth-child(odd) {
  background: #fa6c98;
}
section:nth-child(even) {
  background: #79edfc;
}

#heading {
  width: 120px;
  height: 20px;
  background: #fff;
  border-radius: 90px;
  margin-top: 40px;
}

/*** Responsive Menu For Smaller Device ***/
@media screen and (max-width: 767px) {
  #menu-toggle {
    display: flex;
  }

ul {
    display: inline-block;
    width: 100vw;
    height: 0;
    background: #79edfc;
    position: absolute;
    top: 160px;
    transform: translate(, );
    box-shadow: 0 5px 30px -4px rgba(0, 0, 0, 0.2);
    transition: all 0.3s;
  }
  ul.showMenu {
    height: 250px;
  }
  ul.showMenu li {
    height: 80px;
    opacity: 1;
    visibility: visible;
  }

li {
    width: 50%;
    height: 80px;
    float: left;
    padding-left: 40px;
    opacity: 0;
    visibility: hidden;
    margin-left: 0;
    transition: all 0.3s 0.1s;
  }
  li:first-child, li:nth-child(2) {
    margin-top: 80px;
  }

#head-line {
    transform: scale(0.8);
  }
}

JavaScript

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