Vue를 사용하여 불꽃놀이 애니메이션 특수 효과를 구현하는 방법

vue create firework-animation

cd firework-animation
npm run serve

<template>
  <div class="firework" :style="{ top: posY + 'px', left: posX + 'px' }">
    <div class="dot" v-for="(particle, index) in particles" :key="index" :style="{ backgroundColor: particle.color, top: particle.y + 'px', left: particle.x + 'px' }"></div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      particles: [],
      posX: 0,
      posY: 0,
    };
  },
  methods: {
    explode() {
      for (let i = 0; i < 50; i++) {
        const particle = {
          x: 0,
          y: 0,
          color: getRandomColor(),
          speedX: getRandomFloat(-5, 5),
          speedY: getRandomFloat(-5, 5),
          gravity: 0.1,
          alpha: 1,
        };
        this.particles.push(particle);
      }
      this.animate();
    },
    animate() {
      const animation = requestAnimationFrame(this.animate);
      const canvas = this.$el.getBoundingClientRect().toJSON();

      this.particles.forEach((particle, index) => {
        particle.x += particle.speedX;
        particle.y += particle.speedY;

        particle.speedY += particle.gravity;

        if (particle.alpha > 0.1) {
          particle.alpha -= 0.01;
        } else {
          this.particles.splice(index, 1);
        }

        if (
          particle.x < canvas.left ||
          particle.x > canvas.right ||
          particle.y < canvas.top ||
          particle.y > canvas.bottom
        ) {
          this.particles.splice(index, 1);
        }
      });

      if (this.particles.length === 0) {
        cancelAnimationFrame(animation);
      }
    },
  },
  mounted() {
    this.posX = this.$el.offsetWidth / 2;
    this.posY = this.$el.offsetHeight / 2;

    setInterval(() => {
      this.explode();
    }, 1000);
  },
};

function getRandomColor() {
  const letters = '0123456789ABCDEF';
  let color = '#';
  for (let i = 0; i < 6; i++) {
    color += letters[Math.floor(Math.random() * 16)];
  }
  return color;
}

function getRandomFloat(min, max) {
  return Math.random() * (max - min) + min;
}
</script>

<style scoped>
.firework {
  position: relative;
  width: 300px;
  height: 300px;
  background-color: black;
  margin: 100px auto;
}

.dot {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
</style>

<template>
  <div id="app">
    <Firework></Firework>
  </div>
</template>

<script>
import Firework from './components/Firework.vue';

export default {
  name: 'App',
  components: {
    Firework,
  },
};
</script>

<style>
#app {
  text-align: center;
}
</style>