圆形导航菜单

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html

css

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html

<div class="main">
  <div class="navigation-circle">
    <div class="navigation-circle__inner">
      <svg class="navigation-circle-svg navigation-circle-svg--opaque" version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" viewbox="0 0 320 320" style="enable-background:new 0 0 320 320;">
        <circle cx="160" cy="160" r="158" fill="none" stroke-width="1" stroke="#c644fc" stroke-linecap="round" stroke-miterlimit="10" style="stroke-dashoffset:0;stroke-dasharray:none;"></circle>
      </svg>
      <svg class="navigation-circle-svg navigation-circle-svg--mask" version="1.1" xmlns="http://www.w3.org/2000/svg" x="0px" y="0px" viewbox="0 0 320 320" style="enable-background:new 0 0 320 320;">
        <circle id="mask-circle" cx="160" cy="160" r="158" fill="none" stroke-width="2" stroke="#c644fc" stroke-linecap="round" stroke-miterlimit="10" style="stroke-dasharray:1005.3088px;"></circle>
      </svg>
      <ul class="navigation-circle__list">
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(1)" onmouseenter="calculateOffset(1)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #1
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(2)" onmouseenter="calculateOffset(2)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #2
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(3)" onmouseenter="calculateOffset(3)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #3
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(4)" onmouseenter="calculateOffset(4)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #4
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(5)" onmouseenter="calculateOffset(5)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #5
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(6)" onmouseenter="calculateOffset(6)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #6
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
        <li class="navigation-circle-list-item"><a class="navigation-circle-list-item__point" onclick="onClick(7)" onmouseenter="calculateOffset(7)" onMouseLeave="onMouseLeave()">
            <div class="navigation-circle-list-item__meta">
              <h3 class="navigation-circle-list-item__title">Item #7
              </h3>
              <h4 class="navigation-circle-list-item__subtitle">It just goes round and round</h4>
            </div></a></li>
      </ul>
    </div>
  </div>
</div>

css

@charset "UTF-8";
* {
  margin: 0;
  padding: 0;
  border: 0;
  outline: none;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}

html,
body {
  height: 100vh;
  width: 100vw;
  background-color: #1f1f21;
}

.main {
  display: flex;
  height: 100vh;
  width: 100vw;
  flex-wrap: wrap;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.navigation-circle {
  display: block;
  position: relative;
  height: 320px;
  width: 320px;
  margin: auto;
}
.navigation-circle__inner {
  display: block;
  position: relative;
  height: 100%;
  width: 100%;
}
.navigation-circle__list {
  display: block;
  position: absolute;
  height: 320px;
  width: 320px;
  transform: rotate(-90deg);
  animation: 2.2s cubic-bezier(0.25, -0.25, 0.35, 1) 0 1 animate-in-list forwards;
}

.navigation-circle-svg {
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  transform: rotateZ(-90deg);
}
.navigation-circle-svg--opaque {
  opacity: 0.5;
}
.navigation-circle-svg--mask circle {
  transition: all 0.5s ease;
  transition-delay: 0.5s;
  animation: 2.2s ease 0 1 animate-in-svg-circle-mask backwards;
}

.navigation-circle-list-item {
  display: block;
  position: absolute;
  height: 0;
  width: calc(50% + 16px);
  top: 50%;
  left: 50%;
  list-style: none;
  transform-origin: 0 0;
}
.navigation-circle-list-item__point {
  display: block;
  position: absolute;
  height: 32px;
  width: 32px;
  top: -16px;
  right: 2px;
  cursor: pointer;
  transform: scale(0);
}
.navigation-circle-list-item__point:before {
  content: "?";
  display: block;
  position: absolute;
  height: 32px;
  width: 32px;
  top: 0;
  color: #c644fc;
  background-color: #1f1f21;
  font-size: 12px;
  font-weight: 400;
  line-height: 32px;
  text-align: center;
  border: 2px solid #c644fc;
  border-radius: 50%;
  box-shadow: inset 0px 0px 0px 0px #c644fc;
  transform: scale(0.75);
  transition: all 0.5s ease;
}
.navigation-circle-list-item__point:after {
  content: "";
  display: block;
  position: absolute;
  height: 1px;
  width: 0px;
  top: 18px;
  left: 31px;
  background-color: #c644fc;
  transition: all 0.5s ease;
}
.navigation-circle-list-item__meta {
  display: block;
  position: absolute;
  overflow: hidden;
  opacity: 0;
  transform-origin: center;
  margin-left: 78px;
  min-width: 68px;
  padding: 4px;
}
.navigation-circle-list-item__title {
  display: block;
  color: #f7f7f7;
  text-align: left;
  font-size: 10px;
  border-bottom: 1px solid #f7f7f7;
  padding-bottom: 4px;
  margin-bottom: 6px;
}
.navigation-circle-list-item__subtitle {
  display: block;
  color: #f7f7f7;
  text-align: center;
  font-weight: 200;
  font-size: 8px;
}

.navigation-circle-list-item:nth-of-type(1) {
  transform: rotateZ(calc((360deg / 7) * 1));
}

.navigation-circle-list-item:nth-of-type(1)
.navigation-circle-list-item__meta {
  transform: rotateZ(38.5714285714deg);
}

.navigation-circle-list-item:nth-of-type(1)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 0s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(2) {
  transform: rotateZ(calc((360deg / 7) * 2));
}

.navigation-circle-list-item:nth-of-type(2)
.navigation-circle-list-item__meta {
  transform: rotateZ(-12.8571428571deg);
}

.navigation-circle-list-item:nth-of-type(2)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 0.2s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(3) {
  transform: rotateZ(calc((360deg / 7) * 3));
}

.navigation-circle-list-item:nth-of-type(3)
.navigation-circle-list-item__meta {
  transform: rotateZ(-64.2857142857deg);
}

.navigation-circle-list-item:nth-of-type(3)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 0.4s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(4) {
  transform: rotateZ(calc((360deg / 7) * 4));
}

.navigation-circle-list-item:nth-of-type(4)
.navigation-circle-list-item__meta {
  transform: rotateZ(-115.7142857143deg);
}

.navigation-circle-list-item:nth-of-type(4)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 0.6s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(5) {
  transform: rotateZ(calc((360deg / 7) * 5));
}

.navigation-circle-list-item:nth-of-type(5)
.navigation-circle-list-item__meta {
  transform: rotateZ(-167.1428571429deg);
}

.navigation-circle-list-item:nth-of-type(5)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 0.8s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(6) {
  transform: rotateZ(calc((360deg / 7) * 6));
}

.navigation-circle-list-item:nth-of-type(6)
.navigation-circle-list-item__meta {
  transform: rotateZ(-218.5714285714deg);
}

.navigation-circle-list-item:nth-of-type(6)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 1s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:nth-of-type(7) {
  transform: rotateZ(calc((360deg / 7) * 7));
}

.navigation-circle-list-item:nth-of-type(7)
.navigation-circle-list-item__meta {
  transform: rotateZ(-270deg);
}

.navigation-circle-list-item:nth-of-type(7)
.navigation-circle-list-item__point {
  animation: 1s cubic-bezier(0.55, -0.3, 0.6, 1.5) 1.2s 1 animate-in-list-item-point forwards;
}

.navigation-circle-list-item:hover .navigation-circle-list-item__point:before {
  transform: scale(1);
  font-size: 16px;
}

.navigation-circle-list-item:hover .navigation-circle-list-item__point:after {
  width: 32px;
  left: 34px;
}

.navigation-circle-list-item:hover .navigation-circle-list-item__meta {
  opacity: 1;
}

.navigation-circle-list-item:active .navigation-circle-list-item__point:before,
.navigation-circle-list-item.active .navigation-circle-list-item__point:before {
  transform: scale(0.85);
  color: #1f1f21;
  box-shadow: inset 0px 0px 0px 16px #c644fc;
  border-color: transparent;
}

.navigation-circle-list-item:active .navigation-circle-list-item__point:after,
.navigation-circle-list-item.active .navigation-circle-list-item__point:after {
  width: 34px;
  left: 32px;
}

.navigation-circle-list-item:active .navigation-circle-list-item__meta,
.navigation-circle-list-item.active .navigation-circle-list-item__meta {
  opacity: 1;
}

@keyframes animate-in-list {
  0% {
    transform: rotate(-540deg);
  }
  100% {
    transform: rotate(-90deg);
  }
}
@keyframes animate-in-svg-circle-mask {
  0% {
    stroke-dashoffset: 1005;
  }
  100% {
    stroke-dashoffset: 0;
  }
}
@keyframes animate-in-list-item-point {
  0% {
    transform: scale(0);
  }
  100% {
    transform: scale(1);
  }
}

JavaScript

const pointCount = 7;
const circleRadius = 160;
const startAnimDelta = 5;
const circumference = Math.PI * circleRadius * 2;

var selectedItemIndex = -1;

var circlePath = document.getElementById('mask-circle');

/**
 * @description On Mouse Leave event handler for points
 */
const onMouseLeave = () => {
	let index = (selectedItemIndex !== -1) ? selectedItemIndex : 0;
	calculateOffset(index);
};

/**
 * @description On Click event handler for points
 * @param {Number} index - Index of list item
 */
const onClick = (index) => {
	//If already selected, deselect
	selectedItemIndex = (selectedItemIndex === index) ? -1 : index;
	calculateOffset(index);
	
	//Find active item, deselect
	let activeListItem = document.querySelectorAll('.navigation-circle-list-item.active');
	if (activeListItem.length > 0) activeListItem[0].classList.remove('active');
	
	//Find new item by index, select
	let listItem = document.querySelectorAll('.navigation-circle-list-item:nth-of-type(' + selectedItemIndex + ')');
	if (listItem.length > 0) listItem[0].classList.add('active');
};

/**
 * @description - Calculate offset for circle path by index of list item
 * @param {Number} index - Index of list item
 */
const calculateOffset = (index=0) => {
	let offset = 0;

if (index !== 0) offset = (circumference / pointCount) * (pointCount - index);
	
	circlePath.style.strokeDashoffset = `${offset}px`;
};

// INTRO

let buffer = 500;
let delay = 1000 * (1 + (pointCount / startAnimDelta) - (1 / startAnimDelta)) + buffer;

setTimeout(() => onClick(1), delay);

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