如何使用vue-pdf-embed实现PDF在线预览

vue create vue-pdf-demo
// 或者npm create vite
cd vue-pdf-demo

npm install vue-pdf-embed

<template>
  <div class="page-tool">
    <div class="page-tool-item" @click="lastPage">上一页</div>
    <div class="page-tool-item" @click="nextPage">下一页</div>
    <div class="page-tool-item">{{ state.pageNum }}/{{ state.numPages }}</div>
    <div class="page-tool-item" @click="pageZoomOut">放大</div>
    <div class="page-tool-item" @click="pageZoomIn">缩小</div> 
  </div>
  <div class="pdf-preview">
    <div class="pdf-wrap">
      <vue-pdf-embed :source="state.source" :style="scale" class="vue-pdf-embed" :page="state.pageNum" />
    </div>
  </div>
</template>

<script setup>
import { reactive, onMounted, computed } from "vue";
import VuePdfEmbed from "vue-pdf-embed";
import { createLoadingTask } from "vue3-pdfjs";

const props = defineProps({
  pdfUrl: {
    type: String,
    required: true,
  },
});

const state = reactive({
  source: props.pdfUrl, //预览pdf文件地址
  pageNum: 1, //当前页面
  scale: 1, // 缩放比例
  numPages: 0, // 总页数
});

const scale = computed(() => `transform:scale(${state.scale})`);

onMounted(() => {
  const loadingTask = createLoadingTask(state.source);
  loadingTask.promise.then((pdf) => {
    state.numPages = pdf.numPages;
  });
});

function lastPage() {
  if (state.pageNum > 1) {
    state.pageNum -= 1;
  }
}

function nextPage() {
  if (state.pageNum < state.numPages) {
    state.pageNum += 1;
  }
}

function pageZoomOut() {
  if (state.scale < 2) {
    state.scale += 0.1;
  }
}

function pageZoomIn() {
  if (state.scale > 1) {
    state.scale -= 0.1;
  }
}

</script>

<style lang="less" scoped>
.pdf-preview {
  margin-top: 10px;
  padding:0;
  height: 100vh;
  box-sizing: border-box;
  background-color:  #fff;
}

.pdf-wrap {
  overflow-y: auto;
}

.vue-pdf-embed {
  text-align: center;
  width: 100%;
  border: 1px solid #e5e5e5;
  margin: 0 auto;
  box-sizing: border-box;
}

.page-tool {
  padding-left: 10px;
  padding-right: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgb(66, 66, 66);
  color: white;
  border-radius: 19px;
  margin-left: 10%;
  margin-right: 10%;
}

.page-tool-item {
  padding: 10px 0;
  padding-left: 10px;
  width: 33%;
  text-align: center;
}
</style>

<template>
    <div>
        <PDFView  :pdfUrl="folderSource" />
    </div>
</template>

<script>
import { ref } from "vue";
export default {
   name: "pdf",
   setup() {
     const  folderSource = ref('/path/to/your/pdf/file.pdf');
    
     return{
        folderSource
   }
}
</script>