图片预览

配置安装

Color-Thief 安装包使用文档

yarn add colorthief -S // npm install colorthief --save

代码

<template>
  <div class="img-thief">
    <div class="container">
      <div class="thief-item" v-for="(item, index) in imgList" :key="item">
        <img draggable="false" :src="item" alt="" @contextmenu.prevent @mouseenter="handleMouseEnter($event.target, index)" @mouseleave="handleMouseLeave($event.target, index)" :style="{ opacity: index === hoverIndex ? 1 : hoverIndex === -1 ? 1 : 0.2 }" />
      </div>
    </div>
  </div>
</template>
<script>
import ColorThief from 'ColorThief';
const colorThief = new ColorThief();
export default {
  data() {
    return {
      imgList: [require('@/assets/thief/1.jpg'), require('@/assets/thief/2.jpg'), require('@/assets/thief/3.jpg'), require('@/assets/thief/4.jpg')],
      hoverIndex: -1,
    };
  },

  methods: {
    handleMouseEnter(item, index) {
      let html = document.documentElement;
      this.hoverIndex = index;
      const thiefColors = colorThief.getPalette(item, 3);
      const mapThiefColors = thiefColors.map((color) => `rgb(${color[0]},${color[1]},${color[2]})`);
      html.style.setProperty('--thief-bg-color1', mapThiefColors[0]);
      html.style.setProperty('--thief-bg-color2', mapThiefColors[1]);
      html.style.setProperty('--thief-bg-color3', mapThiefColors[2]);
    },
    handleMouseLeave() {
      let html = document.documentElement;
      this.hoverIndex = -1;
      html.style.setProperty('--thief-bg-color1', '#fff');
      html.style.setProperty('--thief-bg-color2', '#fff');
      html.style.setProperty('--thief-bg-color3', '#fff');
    },
  },
};
</script>

<style lang="scss" scoped>
.img-thief {
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
  background: linear-gradient(to top, var(--thief-bg-color1), var(--thief-bg-color2), var(--thief-bg-color3));
}
.container {
  width: 800px;
  height: 800px;
}
.thief-item {
  width: 370px;
  height: 370px;
  margin-left: 20px;
  margin-top: 20px;
  float: left;
  box-sizing: border-box;
  border: 4px solid transparent;

  &:hover {
    border: 4px solid #fff;
    cursor: pointer;
    transform: translateZ(10px) scale(1.02);
    transition: all 0.8s;
  }

  img {
    width: 100%;
    height: 100%;
    user-select: none;
    display: block;
  }
}
</style>

variable.scss 定义全局变量

html {
  --thief-bg-color1: #fff;
  --thief-bg-color2: #fff;
  --thief-bg-color3: #fff;
}