react实现卡片式弹出层学习教程效果代码-html代码-BFW代码库

代码语言：html
代码描述：react实现卡片式弹出层学习教程效果代码
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">

  
  <link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/10.4.1/styles/agate.min.css'>
  
<style>
@import url("https://fonts.googleapis.com/css2?family=Fredoka+One&display=swap");

body {
  background-color: #151515;
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

a,
a:visited {
  color: inherit;
}

.App {
  display: flex;
  justify-content: center;
  color: white;
}

@media (min-width: 770px) and (min-height: 770px) {
  .App {
    align-items: center;
    height: 100vh;
  }
}

* {
  box-sizing: border-box;
}

header {
  height: 120px;
  margin: 0;
  grid-row: 1;
  grid-column: 1/4;
}

header h1 {
  font-family: "Fredoka One", cursive;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, auto);
  grid-template-rows: repeat(12, auto);
  gap: 10px;
  padding: 50px;
}

.grid .block:nth-of-type(1) {
  grid-row: 2/4;
  grid-column: 1/4;
}

.grid .block:nth-of-type(2) {
  grid-row: 4/6;
  grid-column: 1/4;
}

.grid .block:nth-of-type(3) {
  grid-row: 6/8;
  grid-column: 1/4;
}

.grid .big-block {
  grid-row: 8/11;
  grid-column: 1/4;
}

.grid .small-block {
  grid-row: 11;
  grid-column: 1/4;
}

@media (min-width: 770px) {
  .grid {
    grid-template-columns: repeat(6, auto);
    grid-template-rows: repeat(6, auto);
  }

  .grid .block:nth-of-type(1) {
    grid-row: 2/4;
    grid-column: 1/4;
  }

  .grid .block:nth-of-type(2) {
    grid-row: 4/6;
    grid-column: 1/4;
  }

  .grid .block:nth-of-type(3) {
    grid-row: 1/3;
    grid-column: 4/7;
  }

  .grid .big-block {
    grid-row: 3/6;
    grid-column: 4/7;
  }

  .grid .small-block {
    grid-row: 6;
    grid-column: 1/6;
  }
}

.block {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: inherit;
}

.big-block {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: inherit;
}

.small-block {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: inherit;
}

@media (min-width: 770px) {
  .small-block {
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(1, 1fr);
  }
}

.day {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  cursor: pointer;

  background: white;
  border-radius: 10px;
  perspective: 500px;
}

.day .cover {
  border-radius: 10px;
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Fredoka One", cursive;
  font-size: 3em;
  transform-origin: left top;
  transition: 1s ease-in-out;
}

.day:hover {
  z-index: 10;
}

.day:hover .cover {
  transform: rotateY(-100deg);
}

.day:nth-of-type(5n-4) .cover {
  background-color: #2f3029;
  color: #f5eed7;
}

.day:nth-of-type(5n-3) .cover {
  background-color: #b73a3b;
  color: #f5eed7;

  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='15' height='15' viewBox='0 0 100 100'><circle cx='25' cy='25' r='15' fill='%239B2D2B'/><circle cx='75' cy='75' r='16' fill='%239B2D2B'/></svg>");
}

.day:nth-of-type(5n-2) .cover {
  background-color: #f5eed7;
  color: #252721;

  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='47.5' height='47.5' viewBox='0 0 100 100'><path d='M 25 10 L 25 17 M 25 33 L 25 40 M 10 25 L 17 25 M 33 25 L 40 25' stroke='%23CD803D' stroke-width='6' stroke-linecap='round' /><circle cx='75' cy='75' r='4' fill='%23CD803D'/></svg>");
}

.day:nth-of-type(5n-1) .cover {
  background-color: #b7c7b0;
  color: #252721;

  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 120 120'><polygon fill='%2393A891' points='120 120 60 120 90 90 120 60 120 0 120 0 60 60 0 0 0 60 30 90 60 120 120 120 '/></svg>");
}

.day:nth-of-type(5n-0) .cover {
  background-color: #b73a3b;
  color: #f5eed7;

  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='70' height='70' viewBox='0 0 100 100'><path d='M 0 25 L 25 0 M 0 50 L 50 0 M 0 75 L 75 0 M 0 100 L 100 0 M 0 125 L 125 0 M 0 150 L 150 0 M 0 175 L 175 0' stroke='%239B2D2B' stroke-width='6' /></svg>");
}

.block:nth-of-type(1) *:nth-of-type(2) {
  grid-column: 2;
  grid-row: 1/3;
}

.block:nth-of-type(2) *:nth-of-type(5) {
  grid-column: 3;
  grid-row: 1/3;
}

.block:nth-of-type(3) *:nth-of-type(1) {
  grid-column: 1;
  grid-row: 1/3;
}

.block:nth-of-type(3) *:nth-of-type(4) {
  grid-column: 3;
  grid-row: 1/3;
}

.big-block *:nth-child(5) {
  grid-column: 2/4;
  grid-row: 2;
}

.small-block *:nth-child(2) {
  grid-column: 2/4;
  grid-row: 1;
}

@keyframes App-logo-spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

svg {
  border-radius: 10px;
}

.gingerbread .body {
  fill: #cd803d;
}

.gingerbread .eye {
  fill: white;
}
.gingerbread .mouth {
  fill: none;
  stroke: white;
  stroke-width: 2px;
  rx: 2px;
}

.gingerbread .limb {
  stroke: #cd803d;
  stroke-width: 35px;
  stroke-linecap: round;
}

.house {
  stroke: black;
  stroke-width: 2px;
  fill: white;
}

.house .roof {
  fill: none;
  stroke: #d1495b;
  stroke-width: 10px;
  stroke-linecap: round;
}

.house .door {
  fill: #d1495b;
  rx: 2px;
}

.house .stair {
  fill: gray;
}

.house .window {
  fill: #fdea96;
  rx: 5px;
}

.house .window-sill {
  fill: #d1495b;
  stroke-linecap: round;
  rx: 5px;
}

.candy .body {
  stroke-linecap: round;
  fill: none;
}

.candy .red-mark {
  stroke: #d1495b;
  stroke-width: 2.5px;
}

.candy .green-mark {
  stroke: #234236;
  stroke-width: 2.5px;
}

.gift .box {
  fill: #d1495b;
  stroke: black;
  stroke-width: 2px;
}

.gift .stripe {
  fill: white;
  stroke: black;
  stroke-width: 2px;
}

.gift .ribbon {
  stroke: #b73a3b;
  stroke-width: 4px;
  fill: none;
}

.bear {
  background-color: #f5eed7;
}

.bear .face {
  fill: white;
  rx: 50;
  ry: 30;
}

.bear .mouth {
  fill: none;
  stroke: black;
  stroke-width: 2;
}

.sleigh {
  offset-path: path(
    "M-200 80 L -90 80 Q 60 80 60 -10 A 50 50 0 0 0 -60 -10 Q -60 80 90 80 L 200 80"
  );
  animation: roller-coaster 6000ms infinite linear;
}

@keyframes roller-coaster {
  0% {
    offset-distance: 0%;
  }
  100% {
    offset-distance: 100%;
  }
}

.background {
  display: inline-block;
  border-radius: 10px;

  background-color: #38755b;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50' viewBox='0 0 120 120'%3E%3Cpolygon fill='%230c5c4c' points='120 120 60 120 90 90 120 60 120 0 120 0 60 60 0 0 0 60 30 90 60 120 120 120 '/%3E%3C/svg%3E");
}

.flake {
  animation-duration: inherit;
  animation-name: snowing;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}
.flake.small {
  opacity: 0.7;
}
.flake.slow {
  animation-duration: 5s;
}
.flake.fast {
  animation-duration: 3s;
}

@keyframes snowing {
  from {
    transform: translate(0, -100px);
  }
  to {
    transform: translate(0, 100px);
  }
}

.lights {
  fill: none;
  stroke: #5f4c6c;
  stroke-width: 2;
}

.lights #button {
  cursor: pointer;
}

.bell:hover {
  transform-origin: center 30%;
}

.bell:hover,
.bell:hover .bell-tongue {
  animation-duration: 0.5s;
  animation-delay: -0.25s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: ease-in-out;
  animation-name: ring;
}

@keyframes ring {
  from {
    transform: rotate(-20deg);
  }
  to {
    transform: rotate(20deg);
  }
}

.detail-screen {
  position: fixed;
  width: 100%;
  height: 100%;
  background-color: white;
  z-index: 100;
  display: grid;
  grid-template-columns: auto auto;
}

@media (min-width: 770px) {
  .detail-screen {
    grid-template-columns: minmax(400px, auto) auto;
  }
}

@media (min-width: 1200px) {
  .detail-screen {
    width: 1200px;
    height: calc(100% - 30px);
    border-radius: 10px;
  }
  .details {
    border-top-right-radius: 10px;
    border-bottom-right-radius: 10px;
  }
}

.content {
  display: flex;
  justify-content: center;
  padding: 50px;
}

@media (min-width: 770px) {
  .content {
    padding: 50px 0 50px 0;
  }
}

.close {
  position: absolute;
  top: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: gray;
  cursor: pointer;

  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='50' height='50' viewBox='0 0 100 100'><path d='M 30 30 L 70 70 M 30 70 L 70 30' stroke='white' stroke-width='10' /></svg>");
}

.details {
  padding: 40px;
  background-color: #333333;
  overflow: scroll;
  color: black;
  background-color: lightgray;
}

.code-section {
  margin-top: 3em;
  margin-bottom: 3em;
}

.source-code {
  color: white;
  background-color: #333333;
  padding: 2em;
  border-radius: 5px;
  overflow: scroll;
}

.twitter {
  color: #f5eed7;
  font-size: 0.8em;
  background-color: #16212b;
}

#youtube,
#youtube-card {
  display: none;
}

@media (min-height: 425px) {
  /** Youtube logo by https://codepen.io/alvaromontoro */
  #youtube {
    z-index: 50;
    width: 100px;
    display: block;
    height: 70px;
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: red;
    border-radius: 50% / 11%;
    transform: scale(0.8);
    transition: transform 0.5s;
  }

  #youtube:hover,
  #youtube:focus {
    transform: scale(0.9);
  }

  #youtube::before {
    content: "";
    display: block;
    position: absolute;
    top: 7.5%;
    left: -6%;
    width: 112%;
    height: 85%;
    background: red;
    border-radius: 9% / 50%;
  }

  #youtube::after {
    content: "";
    display: block;
    position: absolute;
    top: 20px;
    left: 40px;
    width: 45px;
    height: 30px;
    border: 15px solid transparent;
    box-sizing: border-box;
    border-left: 30px solid white;
  }

  #youtube span {
    font-size: 0;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
  }

  #youtube:hover + #youtube-card {
    z-index: 49;
    display: block;
    position: fixed;
    bottom: 12px;
    right: 10px;
    padding: 25px 130px 25px 25px;
    width: 300px;
    background-color: white;
  }
}
</style>



</head>

<body  >
  <div id="root"></div>


<script>
  // This section contains the detail screen metadata
  const detailScreens = [];
  detailScreens.push({
    title: "Christmas bauble",
    description: `<p>The SVG tag contains the image elements and defines the frame of our image. It has a width and a height property defining how much space the image takes up in the document. There's also a viewBox property that defines a coordinate system. Every image element is positioned based on this coordinate system. The first two values in viewBox define the top-left coordinate in the image and the last two define the size. The size, in this case, matches the one defined at the width and the height, but that's not necessary. If they don't match the image scales up or scales down. With this setting, the 0,0 coordinate ends up at the middle of the image.</p>
    <p>Let’s start with a simple Christmas bauble. Here we only use simple shapes, a rectangle, and two circles. We position and style these elements with attributes. For the circle, we define the center position and for the rectangle, we define the top left corner. These positions are always related to the coordinate system defined by the viewBox.</p>

<p>We also have presentational attributes that style our shapes. Unlike in HTML, we do not use background-color to set a color for a shape but we use the fill attribute. And to set a border for a shape we use stroke and stroke-width. Note how we use the circle element both to draw a ring and a ball with different attributes.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <circle cx="0" cy="20" r="70" fill="#D1495B" />

  <circle
    cx="0"
    cy="-75"
    r="12"
    fill="none"
    stroke="#F79257"
    stroke-width="2"
  />

  <rect x="-17.5" y="-65" width="35" height="20" fill="#F79257" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Tree",
    description: `<p>We can’t always use basic shapes to assemble our image. A polygon is the simplest way to draw a freeform shape. Here we set a list of coordinates that are connected with straight lines.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <polygon points="0,0 80,120 -80,120" fill="#234236" />
  <polygon points="0,-40 60,60 -60,60" fill="#0C5C4C" />
  <polygon points="0,-80 40,0 -40,0" fill="#38755B" />
  <rect x="-20" y="120" width="40" height="30" fill="brown" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Gingerbread figure",
    description: `<p>Since our SVG is living inside an HTML file now, we can assign CSS classes to each tag and move some attributes to CSS. You can only move the presentation attributes though. Position attributes and attributes that define the shape still have to stay in HTML. But colors, stroke, and font attributes can be moved to CSS.</p>

<p>We already saw the fill and some of the stroke properties, but here’s another one. The stroke-linecap. This can make our line cap round. Note that the legs and the arms are simple lines here. To give you a comparison if we remove the line cap and set a smaller stroke-width, then this is how it would looks like. But by setting a thick stroke width and a round line cap we can shape legs and arms for our figure.</p>

<p>Also, note the rx property at the rectangle defining the mouth. This will make the edges round. You can think of it as border-radius if you like.</p>`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg class=“gingerbread" width="200" height="200" viewBox="-100 -100 200 200">
  <circle class="body" cx="0" cy="-50" r="30" />

  <circle class="eye" cx="-12" cy="-55" r="3" />
  <circle class="eye" cx="12" cy="-55" r="3" />
  <rect class="mouth" x="-10" y="-40" width="20" height="5" rx="2" />

  <line class="limb" x1="-40" y1="-10" x2="40" y2="-10" />
  <line class="limb" x1="-25" y1="50" x2="0" y2="-15" />
  <line class=“limb" x1="25" y1="50" x2="0" y2="-15" />

  <circle class="button" cx="0" cy="-10" r="5" />
  <circle class="button" cx="0" cy="10" r="5" />
</svg>`
      },
      {
        type: "CSS",
        content: `.gingerbread .body {
  fill: #cd803d;
}

.gingerbread .eye {
  fill: white;
}

.gingerbread .mouth {
  fill: none;
  stroke: white;
  stroke-width: 2px;
}

.gingerbread .limb {
  stroke: #cd803d;
  stroke-width: 35px;
  stroke-linecap: round;
}`
      }
    ]
  });
  detailScreens.push({
    title: "House",
    sourceCodes: [{
        type: "HTML",
        content: `<svg class=“house" width="200" height="200" viewBox="-100 -100 200 200">
  <polygon class="wall" points="-65,80 -65,-10 0,-70 65,-10 65,80" />
  <polyline class="roof" points="-75,-8 0,-78 75,-8" />

  <rect class="door" x="-45" y="10" width="30" height="60" />
  <circle class="door-knob" cx="-35" cy="40" r="2" />
  <rect class="stair" x="-47" y="70" width="34" height="5" />
  <rect class="stair" x="-49" y="75" width="38" height="5" />

  <rect class="window" x="5" y="15" width="40" height="35" />
  <line x1="5" y1="32.5" x2="45" y2="32.5" />
  <line x1="25" y1="15" x2="25" y2="50" />
  <rect class="window-sill" x="2" y="48" width="46" height="5" />

  <circle class="window" cx="0" cy="-25" r="15" />
  <line x1="-15" y1="-25" x2="15" y2="-25" />
  <line x1="0" y1="-40" x2="0" y2="-10" />
</svg>`
      },
      {
        type: "CSS",
        content: `.house {
  stroke: black;
  stroke-width: 2px;
  fill: white;
}

.house .roof {
  fill: none;
  stroke: #d1495b;
  stroke-width: 10px;
  stroke-linecap: round;
}

.house .door {
  fill: #d1495b;
  rx: 2px;
}

.house .stair {
  fill: gray;
}

.house .window {
  fill: #fdea96;
  rx: 5px;
}

.house .window-sill {
  fill: #d1495b;
  stroke-linecap: round;
  rx: 5px;
}`
      }
    ]
  });
  detailScreens.push({
    title: "Christmas bauble with clip-path",
    description: `<p>This bauble has a motif on its side defined as a polyline. Polylines normally wouldn't care about the edge of the ball. Part of the line would overhang or stop too soon. We use clip-path here to make sure that the motif fits perfectly with the ball.</p>

<p>We define the motif to be bigger than the ball then we cut the overhanging parts with a clip-path. The clip-path is defined in the definitions section. The defs section is like a hidden compartment of our image. Things here don't show up as part of our image, but we can refer to them and use them later.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <clipPath id="ball">
      <circle cx="0" cy="20" r="70" />
    </clipPath>
  </defs>

  <circle cx="0" cy="20" r="70" fill="#D1495B" />

  <polyline
    clip-path="url(#ball)"
    points="-120 40 -80 0 -40 40 0 0 40 40 80 0 120 40"
    fill="none"
    stroke="#9C2D2A"
    stroke-width="20"
  />

  <circle
    cx="0"
    cy="-75"
    r="12"
    fill="none"
    stroke="#F79257"
    stroke-width="2"
  />
  <rect x="-17.5" y="-65" width="35" height="20" fill="#F79257" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Star",
    description: `<p>A star is a simple shape, so we could define it as a bunch of polygons and set each point individually. But then we would need to know each coordinate. Instead of that, we can just define one wing, then repeat it five times with a rotation to get the same shape. We use the transform attribute to set a rotation.</p>

<p>In this example, each wing consists of two polygons. They need to be rotated the same way, so we can group them with a g tag and rotate them together. You can think of the g tag as the div tag in HTML. On its own, it does not represent anything. But it can contain other elements and attributes defined on the group tag apply to its children.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <g transform="translate(0 5)">
    <g>
      <polygon points="0,0 36,-50 0,-100" fill="#EDD8B7" />
      <polygon points="0,0 -36,-50 0,-100" fill="#E5C39C" />
    </g>
    <g transform="rotate(72)">
      <polygon points="0,0 36,-50 0,-100" fill="#EDD8B7" />
      <polygon points="0,0 -36,-50 0,-100" fill="#E5C39C" />
    </g>
    <g transform="rotate(-72)">
      <polygon points="0,0 36,-50 0,-100" fill="#EDD8B7" />
      <polygon points="0,0 -36,-50 0,-100" fill="#E5C39C" />
    </g>
    <g transform="rotate(144)">
      <polygon points="0,0 36,-50 0,-100" fill="#EDD8B7" />
      <polygon points="0,0 -36,-50 0,-100" fill="#E5C39C" />
    </g>
    <g transform="rotate(-144)">
      <polygon points="0,0 36,-50 0,-100" fill="#EDD8B7" />
      <polygon points="0,0 -36,-50 0,-100" fill="#E5C39C" />
    </g>
  </g>
</svg>`
    }]
  });
  detailScreens.push({
    title: "Snowflake",
    description: `<p>Instead of repeating the same code over and over again we can also create a definition for a shape and reuse it. Here we define a branch of a snowflake then use it six times with different rotations.</p>

<p>The branch is defined as a path. The path is the most powerful SVG tag. We can define pretty much anything with paths and if you open any SVG file, you will see paths mostly.</p>

<p>The shape of the path is defined by the d attribute. Here we define several drawing commands. A command always starts with a letter defining the command type and ends with a coordinate. Here we only have the two most simple commands, move to and line to. The move to command moves the cursor to a point without drawing a line and the line to command draws a straight line from the previous point. A command always continues the previous command so when we draw a line we only define the endpoint. The starting point will be the previous command’s endpoint. This path is a bit unusual because there are several move to commands in it to draw the main branch and each side branches with the same path.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <path
      id="branch"
      d="
        M 0 0 L 0 -90
        M 0 -20 L 20 -34
        M 0 -20 L -20 -34
        M 0 -40 L 20 -54
        M 0 -40 L -20 -54
        M 0 -60 L 20 -74
        M 0 -60 L -20 -74"
      stroke="#E5C39C"
      stroke-width="5"
    />
  </defs>

  <use href="#branch" />
  <use href="#branch" transform="rotate(60)" />
  <use href="#branch" transform="rotate(120)" />
  <use href="#branch" transform="rotate(180)" />
  <use href="#branch" transform="rotate(240)" />
  <use href="#branch" transform="rotate(300)" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Forest",
    description: `Rotation is not the only way we can generate images from simple shapes. In this example, we define a tree shape then place it to various positions in different sizes to draw a forest.`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <g id="tree">
      <polygon points="-10,0 10,0 0 -50" fill="#38755b" />
      <line
        x1="0"
        y1="0"
        x2="0"
        y2="10"
        stroke="#778074"
        stroke-width="2"
      />
    </g>
  </defs>

  <rect x="-100" y="-100" width="200" height="200" fill="#F1DBC3" />
  <circle cx="0" cy="380" r="350" fill="#F8F4E8" />

  <use href="#tree" x="-30" y="25" transform="scale(2)" />
  <use href="#tree" x="-20" y="40" transform="scale(1.2)" />
  <use href="#tree" x="40" y="40" />
  <use href="#tree" x="50" y="30" transform="scale(1.5)" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Christmas bauble with gradient",
    description: `The filling of a shape can be defined as a gradient. Here we apply a radial gradient to our Christmas decoration to have a subtle 3D effect. It has a different syntax than CSS but the capabilities are rather similar. Gradients in SVG though can also be applied for strokes and pretty cool effects can be achieved that way.`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <radialGradient id="shine" cx="0.25" cy="0.25" r="0.35">
      <stop offset="0%" stop-color="#e3a8b0" />
      <stop offset="100%" stop-color="#D1495B" />
    </radialGradient>
  </defs>

  <circle cx="0" cy="20" r="70" fill="url(#shine)" />
  <circle
    cx="0"
    cy="-75"
    r="12"
    fill="none"
    stroke="#F79257"
    stroke-width="2"
  />
  <rect x="-17.5" y="-65" width="35" height="20" fill="#F79257" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Snowman",
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="400" viewBox="-100 -200 200 400">
  <defs>
    <radialGradient id="snowball" cx="0.25" cy="0.25" r="1">
      <stop offset="0%" stop-color="white" />
      <stop offset="50%" stop-color="white" />
      <stop offset="100%" stop-color="#d6d6d6" />
    </radialGradient>
  </defs>

  <circle id="bigball" cx="0" cy="60" r="80" fill="url(#snowball)" />
  <circle cx="0" cy="-40" r="50" fill="url(#snowball)" />
  <polygon points="10,-46 50,-40 10,-34" fill="#e66465" />

  <circle cx="0" cy="-55" r="5" />
  <circle cx="20" cy="-55" r="5" />

  <line
    x1="-40"
    y1="30"
    x2="-90"
    y2="-30"
    stroke="black"
    stroke-width="5"
  />
  <line x1="-65" y1="0" x2="-90" y2="-10" stroke="black" stroke-width="5" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Quadratic Bézier",
    description: `The path element becomes really powerful when we start using curves. One of them is the quadratic Bezier curve that not only defines an endpoint for a segment but also has a control point. The control point is an invisible coordinate to which the line is bending to, but not touching it. Here we have a series of quadratic beziers where the control points get further and further away from the center of the tree as the path goes down.`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="400" viewBox="-100 -200 200 400">
  <path
    d="
      M 0 -80
      Q 5 -75 0 -70
      Q -10 -65 0 -60
      Q 15 -55 0 -50
      Q -20 -45 0 -40
      Q 25 -35 0 -30
      Q -30 -25 0 -20
      Q 35 -15 0 -10
      Q -40 -5 0 0
      Q 45 5 0 10
      Q -50 15 0 20
      Q 55 25 0 30
      Q -60 35 0 40
      Q 65 45 0 50
      Q -70 55 0 60
      Q 75 65 0 70
      Q -80 75 0 80
      Q 85 85 0 90
      Q -90 95 0 100
      Q 95 105 0 110
      Q -100 115 0 120
      L 0 140
      L 20 140
      L -20 140"
    fill="none"
    stroke="#0C5C4C"
    stroke-width="5"
  />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Cubic Bézier",
    description: `<p>While the quadratic bezier is great when we want to bend a line, often it’s not flexible enough. With cubic Bezier, we not only one have one control point but two. The first control point sets the initial direction of the curve and the second one defines from which direction should the curve arrive to its endpoint. If these directions match the directions of the line before and the line after the curve, then we have a smooth transitioning between the path segments.</p>

<p>In this example the ribbon of the gift box uses a cubic Bezier that smoothly continues the previous straight line then turns back to the direction of the upcoming line.</p>`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <circle cx="0" cy="-50" r="10" fill="#a9172a" />
  <rect class="box" x="-60" y="-40" width="120" height="100" />
  <rect class="box" x="-70" y="-47" width="140" height="20" />
  <rect class="stripe" x="-20" y="-40" width="40" height="100" />
  <rect class="stripe" x="-25" y="-47" width="50" height="20" />

  <path
    class="ribbon"
    d="
      M 0 -50
      L 30 -50
      C 50 -50 50 -70 30 -65
      L 0 -50"
  />

  <path
    class="ribbon"
    d="
      M 0 -50
      L -30 -50
      C -50 -50 -50 -70 -30 -65
      L 0 -50"
  />
</svg>`
      },
      {
        type: "CSS",
        content: `.gift .box {
  fill: #d1495b;
  stroke: black;
  stroke-width: 2px;
}

.gift .stripe {
  fill: white;
  stroke: black;
  stroke-width: 2px;
}

.gift .ribbon {
  stroke: #b73a3b;
  stroke-width: 4px;
  fill: none;
}`
      }
    ]
  });
  detailScreens.push({
    title: "Bell",
    description: `Let’s have another example with cubic and quadratic beziers. Here the bottom of this bell is defined with straight lines. Then a quadratic Beziers starts the bell cloak. Then the line is continued with a cubic Bezier to form the top of the bell. Then we reach the bottom part with another quadratic bezier.`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <g stroke="black" stroke-width="2">
    <circle cx="0" cy="-45" r="7" fill="#4F6D7A" />
    <circle cx="0" cy="50" r="10" fill="#F79257" />
    <path
      d="
        M -50 40
        L -50 50
        L 50 50
        L 50 40
        Q 40 40 40 10
        C 40 -60 -40 -60 -40 10
        Q -40 40 -50 40"
      fill="#FDEA96"
    />
  </g>
</svg>`
    }]
  });
  detailScreens.push({
    title: "Arc",
    description: `<p>If you thought that cubic Beziers are the most complicated parts of SVGs then I have bad news for you. Arcs are even more complicated.</p>

<p>The last two parameters are still the endpoint of the arc. Arcs have five extra parameters on top of that though. You define a horizontal and vertical radius for an arc. If these two values are not the same then you end up with an ellipse. If you draw an ellipse you can also turn it by an angle, which will be the third parameter. Given the starting point coming from the previous segment, given the endpoint defined here, and the radiuses there are still two possible arc centers and four possible arcs to draw. The last two parameters of an arc are to pick one of these four options.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="400" viewBox="-100 -200 200 400">
  <path
    d="
      M 50 120
      L 50 -80
      A 50 50 0 0 0 -50 -80"
    stroke="#cd803d"
    stroke-width="45"
    class="body"
  />

  <path
    d="
      M 50 120
      L 50 -80
      A 50 50 0 0 0 -50 -80"
    stroke="white"
    stroke-width="40"
    class="body"
  />

  <line class="green-mark" x1="-35" y1="-90" x2="-60" y2="-100" />
  <line class="red-mark" x1="-15" y1="-115" x2="-25" y2="-135" />
  <line class="green-mark" x1="20" y1="-110" x2="35" y2="-130" />
  <line class="red-mark" x1="40" y1="-60" x2="60" y2="-80" />
  <line class="green-mark" x1="40" y1="-10" x2="60" y2="-30" />
  <line class="red-mark" x1="40" y1="40" x2="60" y2="20" />
  <line class="green-mark" x1="40" y1="90" x2="60" y2="70" />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Ribbon",
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <path
      id="ribbon"
      d="
        M 0 -20
        Q 28 -40 56 -45
        C 96 -48 96 48 56 45
        Q 28 40 0 20"
      fill="#B73A3B"
    />
  </defs>

  <use href="#ribbon" />
  <use href="#ribbon" transform="scale(-1)" />
  <ellipse cx="0" cy="0" rx="20" ry="24" fill="#9C2D2A" />

  <path
    d="
      M 0 20
      Q 40 40 30 60
      Q 20 80 40 90

      M 0 20
      Q -30 30 -20 60
      Q -10 90 -50 100"
    fill="none"
    stroke="#B73A3B"
    stroke-width="3"
  />
</svg>`
    }]
  });
  detailScreens.push({
    title: "Bear",
    sourceCodes: [{
        type: "HTML",
        content: `<svg class="bear" width="200" height="200" viewBox="-100 -100 200 200">
  <circle cx="-40" cy="-50" r="20" fill="white" />
  <circle cx="40" cy="-50" r="20" fill="white" />
  <circle cx="-40" cy="-50" r="15" fill="#E5C39C" />
  <circle cx="40" cy="-50" r="15" fill="#E5C39C" />

  <rect class="face" x="-55" y="-60" width="110" height="120" />
  <circle cx="20" cy="-30" r="3" />
  <circle cx="-20" cy="-30" r="3" />

  <path
    d="
      M -30 0
      C -30 -25 30 -25 30 0
      L 30 30
      Q 30 40 20 40
      L -20 40
      Q -30 40 -30 30"
    fill="#E5C39C"
  />
  <path
    d="
      M -10 0
      L 10 0
      C 10 20 -10 20 -10 0"
  />
  <path
    class="mouth"
    d="
      M 0 10
      Q 0 25 10 25

      M 0 10
      Q 0 25 -10 25"
  />
</svg>`
      },
      {
        type: "CSS",
        content: `.bear {
  background-color: #f5eed7;
}

.bear .face {
  fill: white;
  rx: 50;
  ry: 30;
}

.bear .mouth {
  fill: none;
  stroke: black;
  stroke-width: 2;
}`
      }
    ]
  });
  detailScreens.push({
    title: "Text Path",
    description: `Drawing shapes are not the only use case for paths. We can also use them to render a text along an invisible path. We can define a path in the definitions section to make sure it's invisible. Then we refer to it in the textPath attribute to make a text go around a circle. Here we use arc again, but you can use any other path and the text will follow it.`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <path id="text-arc" d="M 0, 50 A 50 50 0 1 1 1,50" />
  </defs>

  <text
    fill="#0c5c4c"
    font-family="Tahoma"
    font-size="0.77em"
    font-weight="bold"
  >
    <textPath href="#text-arc">
      Happy Holidays! Happy Holidays! Happy Holidays!
    </textPath>
  </text>
</svg>`
    }]
  });
  detailScreens.push({
    title: "Path based animation",
    description: `<p>Another fun use of paths is to create animation paths. This method is not SVG only. I’m using a CSS property here that works for any other HTML tag. But if you check the value of this attribute, you see that we define a path the same way as we do for SVGs.</p>

<p>To give you a fair warning though, this feature at this point is rather experimental at this point and it’s not supported for Safari. There’s also an old SVG specific way for doing the same thing with animationMotion. Unfortunately, that’s rather obsolete. So at this point, neither of these are fully supported, but I’m sure there’s going to be a way in the future to use paths for animation.</p>`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg width="400" height="200" viewBox="-200 -100 400 200" fill="none">
  <path
    stroke="#E0CEB9"
    stroke-width="4"
    d=“
      M-200 80 L -80 80 Q 80 80 70 -10
      A 70 70 0 0 0 -70 -10
      Q -80 80 80 80 L 200 80"
  />

  <g class="sleigh">
    <path
      d="
      M -30 -2 L 30 -2 A 10 10 0 0 0 30 -22
      M -20 -2 L -20 -17
      M 20 -2 L 20 -17"
      stroke="#AF6455"
      stroke-width="5"
    />
    <path d="M -27 -17 L 27 -17" stroke="#7A504F" stroke-width="6" />
  </g>
</svg>`
      },
      {
        type: "CSS",
        content: `.sleigh {
  offset-path: path(
    "M-200 80 L -90 80 Q 60 80 60 -10 A 50 50 0 0 0 -60 -10 Q -60 80 90 80 L 200 80"
  );
  animation: roller-coaster 6000ms infinite linear;
}

@keyframes roller-coaster {
  0% {
    offset-distance: 0%;
  }
  100% {
    offset-distance: 100%;
  }
}`
      }
    ]
  });
  detailScreens.push({
    title: "Ringing on hover",
    description: `A more traditional animation that certainly works in every browser is a ringing effect. We animate the transform property with keyframes. We can even trigger this effect on hovering. There’s nothing SVG specific here. The same works with any HTML element, but it’s a cool example of how to combine SVGs with CSS.`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg class="bell" width="200" height="200" viewBox="-100 -100 200 200">
  <g stroke="#001514" stroke-width="2">
    <circle cx="0" cy="-45" r="7" fill="#4F6D7A" />
    <circle class="bell-tongue" cx="0" cy="50" r="10" fill="#F79257" />
    <path
      d="
        M -50 40
        L -50 50
        L 50 50
        L 50 40
        Q 40 40 40 10
        C 40 -60 -40 -60 -40 10
        Q -40 40 -50 40"
      fill="#FDEA96"
    />
  </g>
</svg>`
      },
      {
        type: "CSS",
        content: `.bell:hover {
  transform-origin: center 30%;
}

.bell:hover,
.bell:hover .bell-tongue {
  animation-duration: 0.5s;
  animation-delay: -0.25s;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: ease-in-out;
  animation-name: ring;
}

@keyframes ring {
  from {
    transform: rotate(-20deg);
  }
  to {
    transform: rotate(20deg);
  }
}`
      }
    ]
  });
  detailScreens.push({
    title: "Snowing",
    descritpion: `To continue our forest example we can add a snowing effect with a similar animation. We animate transform again, but this time we move many more elements. It's a bit glitchy and not the most sophisticated animation, but you get the idea.`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <defs>
    <g id="tree">
      <polygon points="-10,0 10,0 0 -50" fill="#38755b" />
      <line x2="0" y2="10" stroke="#778074" stroke-width="2" />
    </g>
   <circle id="big" cx="0" cy="0" r="5" fill="white" />
    <circle id="small" cx="0" cy="0" r="3" fill="white" />
  </defs>

  <rect
    x="-100"
    y="-100"
    width=“200"
    height="200"
    fill=“#F1DBC3"
  />
  <circle cx="0" cy="380" r="350" fill="#F8F4E8" />

  <use href="#tree" x="-30" y="25" transform="scale(2)" />
  <use href="#tree" x="-20" y="40" transform="scale(1.2)" />
  <use href="#tree" x="40" y="40" />
  <use href="#tree" x="50" y="30" transform="scale(1.5)" />

  <use href="#big" x="0" y="0" class="flake fast" />
  <use href="#big" x="-50" y="-20" class="flake fast opaque" />
  <use href="#big" x="30" y="-40" class="flake fast" />
  <use href="#big" x="50" y="-20" class="flake fast opaque" />
  <use href="#big" x="30" y="50" class="flake slow" />
  <use href="#big" x="-70" y="-80" class="flake slow opaque" />
  <use href="#big" x="30" y="50" class="flake slow" />
  <use href="#big" x="90" y="-80" class="flake slow opaque" />
  <use href="#small" x="10" y="-50" class="flake slow" />
  <use href="#small" x="-50" y="-60" class="flake slow opaque" />
  <use href="#small" x="30" y="70" class="flake slow" />
  <use href="#small" x="10" y="-80" class="flake slow opaque" />
</svg>`
      },
      {
        type: "CSS",
        content: `.flake {
  animation-duration: inherit;
  animation-name: snowing;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

@keyframes snowing {
  from {
    transform: translate(0, -100px);
  }
  to {
    transform: translate(0, 100px);
  }
}

.flake.opaque {
  opacity: 0.7;
}

.flake.slow {
  animation-duration: 5s;
}

.flake.fast {
  animation-duration: 3s;
}`
      }
    ]
  });
  detailScreens.push({
    title: "Background pattern",
    description: `This example is a bit of an easter egg. For any HTML element, you can set a background image in CSS. Here we usually provide a link to an image, but we can also inline one here. Normally you wouldn't do that, because you end up with something gibberish in your CSS. If we do that with an SVG though then it’s not even that cryptic. This SVG code is still character encoded, so that’s why you still see some weird parts.  The pointy brackets are replaced here. This is a great way to create background patterns with only a few lines of code in CSS. If you like this idea check out svgbackgrounds.com for a lot of great patterns.`,
    sourceCodes: [{
        type: "HTML",
        content: `<div class="background" />`
      },
      {
        type: "CSS",
        content: `.background {
  background-color: #38755b;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='50' height='50' viewBox='0 0 120 120'%3E%3Cpolygon fill='%230c5c4c' points='120 120 60 120 90 90 120 60 120 0 120 0 60 60 0 0 0 60 30 90 60 120 120 120 '/%3E%3C/svg%3E");
}
      `
      }
    ]
  });
  detailScreens.push({
    title: "Clock",
    description: `<p>SVG elements can be manipulated from JavaScript the same way as any other HTML tag. In this example we are using a short code snipped to show the actual time on a clock. You can even have a script tag inside the SVG but of course, you can have it outside of an SVG as well and refer to the elements the same way.</p>

<p>There’s another trick here worth mentioning. The dots here showing each hour are actually part of a circle. In CSS we can set the border-style to be dashed, but CSS is not too flexible on this one. SVG though took this to the next level and we can fine-tune the length of each dash segment and the space in between. That’s what we use here to show the dots for each hour.</p>`,
    sourceCodes: [{
      type: "HTML",
      content: `<svg width="200" height="200" viewBox="-100 -100 200 200">
  <script>
    window.addEventListener("DOMContentLoaded", () => {
      const hoursElement = document.getElementById("hours");
      const minutesElement = document.getElementById("minutes");
      const hour = new Date().getHours() % 12;
      const minute = new Date().getMinutes();
      hoursElement.setAttribute("transform", \`rotate(\${(360 / 12) * hour})\`);
      minutesElement.setAttribute("transform", \`rotate(\${(360 / 60) * minute})\`);
    });
  \</script\>

  <rect x="-100" y="-100" width="200" height="200" fill="#CD803D" />

  <circle r="55" stroke="#FCCE7B" stroke-width="10" fill="white" />
  <circle
    r="45"
    stroke="#B6705F"
    stroke-width="6"
    stroke-dasharray="6 17.56194490192345"
    stroke-dashoffset="3"
    fill="none"
  />

  <g stroke="#5f4c6c" stroke-linecap="round">
    <line id="hours" y2="-20" stroke-width="8" />
    <line id="minutes" y2="-35" stroke-width="6" />
  </g>
</svg>`
    }]
  });
  detailScreens.push({
    title: "Interaction",
    description: `We can not only manipulate SVGs from JavaScript but we can also assign event listeners to parts of SVGs. Here, by clicking the red button we switch on or off the lights. The possibilities are endless. You can even create a full-featured game with SVG and JavaScript.`,
    sourceCodes: [{
        type: "HTML",
        content: `<svg class="lights" width="200" height="200" viewBox="-100 -100 200 200">
  <script>
    window.addEventListener("DOMContentLoaded", () => {
      const button = document.getElementById("button");
      let lightsOn = false;
      button.addEventListener("click", () => {
        const bulbs = document.querySelectorAll(".b");
        bulbs[0].setAttribute("fill", lightsOn ? "white" : "#FFC05B");
        bul.........完整代码请登录后点击上方下载按钮下载查看