页面过渡动画效果（CSS/VueJS）

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html

css

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html

<v-app id="page">
    <v-content>
      <v-container fluid fill-height>
        <v-layout align-center justify-center>
          <v-flex xs10 sm8 lg6>

<v-card class="elevation-12">
              <v-toolbar color="primary" dark flat dense>
                <v-toolbar-title>Reveal Effect #2 (CSS)</v-toolbar-title>
                <v-spacer></v-spacer>
                <v-progress-circular v-if="!revealed" indeterminate size="18"></v-progress-circular>   
              </v-toolbar>

<v-card-text>
                <v-row>
                  <v-col cols="12" sm="6">
                    <v-select v-model="anim" :items="anims" label="Animation"></v-select>
                    <v-slider v-model="animDuration" min="1" max="5" label="Duration" thumb-label prepend-icon="mdi-timer"></v-slider>
                    <v-slider v-model="animDelay" min="0" max="5" label="Delay" thumb-label prepend-icon="mdi-timer"></v-slider>  
                  </v-col>
                  <v-col cols="12" sm="6">
                    <v-select v-model="shape" :items="shapes" label="Shape"></v-select>
                    <v-slider v-model="shapeSize" min="30" max="100" label="Size" thumb-label prepend-icon="mdi-crop"></v-slider>  
                  </v-col>
                </v-row>

<v-row>
                  <v-col cols="12" sm="6">
                    Delay type
                    <v-radio-group v-model="delayType" row>
                      <v-radio v-for="t in delayTypes" :key="t.value" :label="t.text" :value="t.value"></v-radio>
                    </v-radio-group>
                  </v-col>
                  <v-col cols="12" sm="6">
                    <v-switch v-model="randomColors" label="Random colors" dense></v-switch>
                    <v-switch v-model="animDurationRnd" label="Random duration" dense></v-switch>
                  </v-col>
                </v-row>
              </v-card-text>

<v-card-actions class="justify-center">
                <div class="text-center">
                  <v-btn @click="randomEffect" :disabled="!revealed" color="primary" small>Random</v-btn>
                  <v-btn @click="revealEffect" :disabled="!revealed" color="primary" small>Go</v-btn>
                </div>
              </v-card-actions>
            </v-card>

</v-flex>
        </v-layout>
      </v-container>
    </v-content>
  </v-app>

</div>

css

@import url("https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.7.2/animate.min.css");
@import url("https://cdn.jsdelivr.net/npm/@mdi/font@4.x/css/materialdesignicons.min.css");
@import url("https://cdn.jsdelivr.net/npm/vuetify@2.x/dist/vuetify.min.css");
body {
  margin: 0;
  width: 100%;
  height: 100%;
}

#page {
  visibility: hidden;
}

#reveal {
  position: fixed;
  z-index: 1;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  pointer-events: none;
}

#app.loaded .v-application {
  background-image: radial-gradient(circle, #73aad6, #003962, #000);
}

#app.loaded #page {
  visibility: visible;
}

#app.loaded #reveal {
  opacity: 1;
}

#app.revealed #reveal {
  display: none;
}

#reveal > div {
  position: absolute;
  background-color: #fff;
  animation-fill-mode: forwards;
}

#reveal > .circle {
  border-radius: 50%;
}

.custom1 {
  animation-name: custom1;
  animation-timing-function: ease-in;
}

@keyframes custom1 {
  from { opacity: 1; transform: scale3d(1, 1, 1) translate3d(0, 0, 0); }
  to { opacity: 0; transform: scale3d(0.2, 0.2, 0.2) translate3d(150px, -100px, 0); }
}

JavaScript

const { random: rnd, floor, ceil, sqrt } = Math;

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data: {
    elements: [],
    shape: 'circle',
    shapes: ['square', 'circle'],
    shapeSize: 50,
    shapeRadius: 50,
    anim: 'zoomOut',
    animDuration: 2.5,
    animDurationRnd: false,
    animDelay: 2.5,
    delayType: 'radial1',
    delayTypes: [
      { value: 'horizontal', text: 'Horizontal' },
      { value: 'radial1', text: 'Radial' },
      { value: 'radial2', text: 'Radial (inverse)' },
      { value: 'random', text: 'Random' },
      { value: 'vertical', text: 'Vertical' },
    ],
    anims: [
      'custom1',
      'bounceOut',
      'zoomOut', 'zoomOutDown', 'zoomOutLeft', 'zoomOutRight', 'zoomOutUp',
      'fadeOut', 'fadeOutDown', 'fadeOutLeft', 'fadeOutRight', 'fadeOutUp',
      'flipOutX', 'flipOutY',
      'lightSpeedOut',
      'rotateOut', 'rotateOutDownLeft', 'rotateOutDownRight', 'rotateOutUpLeft', 'rotateOutUpRight',
      'rollOut',
    ],
    randomColors: true,
    loaded: false, revealed: false,  
    width: 0, height: 0, cx: 0, cy: 0, nx: 0, ny: 0
  },
  mounted() {
    this.onResize();
    window.addEventListener('resize', this.onResize);
    this.revealEffect();
  },
  methods: {
    revealEffect() {
      this.loaded = false;
      this.revealed = false;
      this.shapeRadius = this.shapeSize * (1 + sqrt(2) / 2);
      this.nx = ceil(this.width / this.shapeSize)+1;
      this.ny = ceil(this.height / this.shapeSize)+1;
      this.animCount = this.nx * this.ny;
      this.elements = [];
      for (let i = 0; i < this.nx; i++) {
        for (let j = 0; j < this.ny; j++) {
          const x = i * this.shapeSize;
          const y = j * this.shapeSize;
          const duration = this.animDurationRnd ? rnd() * this.animDuration : this.animDuration;
          const el = { x, y, duration, delay: this.delay(i, j, x, y), anim: this.anim, shape: this.shape };
          el.style = this.getStyle(el);
          this.elements.push(el);
        }
      }
      if (this.randomColors) {
        setTimeout(() => {
          const cscale = chroma.scale([chroma.random(), chroma.random()]);//.mode('lch');
          this.elements.forEach(el => {
            el.style = { ...el.style, 'background-color': cscale(rnd()) };
          });
        }, 150);
      }
      this.loaded = true;
    },
    randomEffect() {
      this.shape = this.shapes[floor(rnd() * this.shapes.length)];
      this.shapeSize = 50 + rnd() * 50;
      this.anim = this.anims[floor(rnd() * this.anims.length)];
      this.animDuration = 1.5 + rnd() * 3;
      this.animDurationRnd = rnd() > 0.7;
      this.animDelay = 1.5 + rnd() * 2;
      this.delayType = this.delayTypes[floor(rnd() * this.delayTypes.length)].value;
      this.randomColors = rnd() > 0.4;
      this.revealEffect();
    },
    animationend(e) {
      if (--this.animCount==0) {
        this.revealed = true;
        this.elements = [];
      }
    },
    getStyle(el) {
      const style = {};
      let x = el.x - 1;
      let y = el.y - 1;
      let w = this.shapeSize + 2, h = w;
      if (this.shape=='circle') {
        x -= this.shapeSize * 0.5 * sqrt(2);
        y -= this.shapeSize * 0.5 * sqrt(2);
        w = this.shapeRadius + 2; h = w;
      }
      style.left = x + 'px'; style.top = y + 'px';
      style.width = w + 'px'; style.height = h + 'px';
      style['animation-duration'] = el.duration + 's';
      style['animation-delay'] = el.delay + 's';
      if (this.randomColors) {
        style['transition-property'] = 'background-color';
        style['transition-delay'] = (el.delay - 0.15) + 's';
        style['transition-duration'] = (el.duration - 0.15) + 's';
      }
      return style;
    },
    delay(i, j, x, y) {
      let delay = 0, dx, dy, d, max;
      switch (this.delayType) {
        case 'horizontal':
          delay = (i*this.ny+j) * this.animDelay / 500;
          break;
        case 'radial1':
          dx = x - this.cx + this.shapeSize/2;
          dy = y - this.cy + this.shapeSize/2;
          d = Math.sqrt(dx*dx + dy*dy);
          delay = d * this.animDelay / 500;
          break;
        case 'radial2':
          max = Math.sqrt(this.cx*this.cx + this.cy*this.cy);
          dx = x - this.cx + this.shapeSize/2;
          dy = y - this.cy + this.shapeSize/2;
          d = max - Math.sqrt(dx*dx + dy*dy);
          delay = d * this.animDelay / 500;
          break;
        case 'vertical':
          delay = (j*this.nx+i) * this.animDelay / 500;
          break;
        default:
          delay = Math.random() * this.animDelay;
          break;
      }
      return delay + 0.4;
    },
    onResize() {
      this.width = window.innerWidth;
      this.height = window.innerHeight;
      this.cx = this.width / 2;
      this.cy = this.height / 2;
    }
  }
});

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