vue-pdf实现pdf在线预览并实现自定义预览框高度

npm install --save vue-pdf

  .pdf-preview {
    height: 100%;
  }

  .pdf-preview {
    height: 100%;
  }
  // 穿透vue-pdf插件中的canvas样式
  .pdf-preview canvas {
    //提高指定样式规则的应用优先权（优先级）
    height: 100% !important;
  }

<!--
 * @Author: WenZhiming
 * @Date: 2022-09-26 17:17:55
 * @LastEditors: WenZhiming
 * @LastEditTime: 2022-09-26 18:03:13
 * @Description: file content
-->
<template>
  <div class="container_upload relative">
    <pdf
      v-if="pdfUrl && pdfUrl.endsWith('.pdf')"
      class="pdf-preview"
      :src="pdfUrl"
    ></pdf>
    <div class="buttons">
      <el-button v-if="pdfUrl" type="primary" plain @click="previewPDF">
        {{ $t('查看') }}
      </el-button>
      <el-button type="primary" class="mt-12" @click="uploadPdf">
        {{ $t('上傳') }}
      </el-button>
    </div>
    <input
      ref="pdfInput"
      type="file"
      style="display: none"
      accept="application/pdf"
      @change="fileChange"
    />
  </div>
</template>

<script>
  import pdf from 'vue-pdf'
  export default {
    components: {
      pdf,
    },
    data() {
      return {
        pdfUrl: '',
      }
    },
    methods: {
      uploadPdf() {
        this.$refs.pdfInput.click()
      },
      fileChange(ev) {
        //文件上传到阿里云oss获得url
        // this._upload(ev, (url) => {
        //   this.pdfUrl = url
        // })
        this.pdfUrl = 'https://www.pinduoduo.com/pdd_privacy_policy.pdf'
      },
      previewPDF() {
        window.open(this.pdfUrl, '_blank')
      },
    },
  }
</script>

<style lang="scss">
  .container_upload {
    width: 150px;
    height: 256px;
    border: 1px solid #ddd;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    .buttons {
      z-index: 1;
      position: absolute;
      display: flex;
      flex-direction: column;
      .el-button {
        margin-left: 0;
        width: 80px;
      }
    }
    img {
      width: 100%;
      height: 100%;
    }
  }

  .pdf-preview {
    height: 100%;
  }
  // 穿透vue-pdf插件中的canvas样式
  .pdf-preview canvas {
    //提高指定样式规则的应用优先权（优先级）
    height: 100% !important;
  }
</style>