vue吸取图片主题色---ColorThief

npm i --save colorthief

<template>
  <div>
    <img :src="coverLarge" crossorigin="anonymous" alt="" />
  </div>
</template>
<script>
import ColorThief from 'colorthief'
export default {
  data () {
    return {
      coverLarge:'',
    };
  },
  methods: {
    ImgColor() {
      let domImg = document.querySelector('img'); // 获取图片dom节点
      let colorthief = new ColorThief();
      domImg.addEventListener('load', () => { // 图片加载
        console.log('主色调', this.rgbaToHex(colorthief.getColor(domImg)));//图片主色调，第二个参数可选(1~10)
      })
    },
    rgbaToHex(rgba) { // rgba转16进制
      let hex = '#';
      for (const i of rgba) {
        hex += i.toString(16).padStart(2, '0');
      }
      return hex;
    },
    getMusicList () {
      return new Promise((resolve, reject) => {
        let sData = {}
        songInfo(sData).then(response => {
          const { data: res } = response
          this.coverLarge = res.data.coverLarge
          this.$nextTick(() => {
            this.ImgColor()
          })
        })
        resolve(true)
      }).catch(() => {
        reject(false)
      })
    },
  },
  mounted () {
    this.getMusicList()
  },
};
</script>

如果报错：The canvas has been tainted by cross-origin data.
说明跨域了，需要给图片设置属性：crossorigin="anonymous"