官网下载PDF.JS，得到  以下文件，放到PUBLIC目录 下：

注：记得修改viewer.html/viewer.mjs中的路径。

新建pdfview.vue：

<script setup>
import {ref, onMounted} from 'vue'
import http from "@/utils/http.js";
import router from "@/router/index.js";
import {useRoute} from 'vue-router';

const route = useRoute();

const url = ref('');

function onBack() {
  router.go(-1);
}

onMounted(() => {
  console.log(route.query)
  url.value = "/pdf/viewer.html?file="+ route.query.url;
  console.log('pdf url:' + url.value);

});
</script>

<template>
  <div class="page">
    <iframe width="100%" style="height: 100vh;border:none;" :src="url"></iframe>
  </div>
</template>

<style scoped>


</style>