代码实现

<template>
  <div class="page">
    <div id="to-img-dom">
      <strong>我是图片标题</strong>
      <p>
        我是内容，我是内容，我是内容，我是内容，我是内容，我是内容，我是内容，我是内容，我是内容，我是内容，我是内容
      </p>
      <img class="icon" src="./../../assets/qr_code.png" alt="" />
    </div>
    <div>
      <button style="margin: 12px; background-color: #ccc" @click="copyDivToImage">
        转图片到剪贴板并下载
      </button>
    </div>
  </div>
</template>

<script setup lang="ts">
import { ref, onMounted } from "vue";
import html2canvas from "html2canvas";

let copyDivToImage = () => {
  // 获取要转换的元素
  let element = document.getElementById("to-img-dom") as HTMLElement;
  // 调用html2canvas
  html2canvas(element).then((canvas) => {
    canvas.toBlob(
      async (blob) => {
        // 复制文件到剪贴板
        try {
          await navigator.clipboard.write([
            // eslint-disable-next-line no-undef
            new ClipboardItem({
              [blob!.type]: blob!,
            }),
          ]);
          console.log("图像已成功复制到剪贴板");
          downloadClipboardImage();
        } catch (err) {
          console.error("无法复制图像到剪贴板", err);
        }
      },
      "image/png", // 文件的格式
      1 // 图像压缩质量 0-1
    );
  });
};
//把剪贴板图片下载到本地
let downloadClipboardImage = async () => {
  try {
    // 获取剪贴板中的数据
    const data = await navigator.clipboard.read();

    // 检查是否有图片数据
    const imageData = data.find(
      (item) => item.types.includes("image/png") || item.types.includes("image/jpeg")
    );

    if (imageData) {
      const blob = await imageData.getType(imageData.types[0]);

      // 创建一个临时的 URL
      const url = URL.createObjectURL(blob);

      // 创建一个隐藏的链接元素并触发点击事件来下载图片
      const link = document.createElement("a");
      link.href = url;
      link.download = "clipboard-image.png";
      link.click();

      // 清理临时的 URL
      URL.revokeObjectURL(url);
    } else {
      console.error("剪贴板中没有图片数据");
    }
  } catch (error) {
    console.error("读取剪贴板数据失败:", error);
  }
};
</script>

<style scoped lang="less">
.page {
  display: flex;
  align-content: center;
  justify-content: center;
  #to-img-dom {
    padding: 12px;
    width: 200px;
    height: 300px;
    background-image: url("./../../assets/bg.png");
    background-size: 100% 100%;
    border-radius: 8px;
    .icon {
      width: 100px;
      height: 100px;
    }
  }
}
</style>