vue3在页面中展示PDF

添加PDF预览插件

npm install vue-pdf-embed
npm install vue3-pdfjs

使用插件来展示pdf

import { reactive, onMounted, computed } from "vue";
import VuePdfEmbed from "vue-pdf-embed";
import { createLoadingTask } from "vue3-pdfjs"; // 获得总页数
import pdfurl from '/@/assets/abc.pdf'; //pdf存放地址

在template中写入

<vue-pdf-embed :source="state.source" :style="scaleFun" class="vue-pdf-embed" :page="state.pageNum" width="800"/>

各参数及作用请见官网
https://www.npmjs.com/package/vue-pdf-embed

实现上下页跳转

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

const state = reactive({
    source: 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 scaleFun = computed(() => 'transform:scale(${state.scale})')
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;
    }
}

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

源代码

<template>
<div class="pdf-preview">
    <div class="pdf-wrap">
     <vue-pdf-embed :source="state.source" :style="scaleFun" class="vue-pdf-embed" :page="state.pageNum" width="800"/>
</div>
<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>

</template>

<script lang="ts" setup>
import { reactive, onMounted, computed } from "vue";
import VuePdfEmbed from "vue-pdf-embed";
import { createLoadingTask } from "vue3-pdfjs"; // 获得总页数
import pdfurl from '/@/assets/abc.pdf';

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

const state = reactive({
    source: 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 scaleFun = computed(() => 'transform:scale(${state.scale})')
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;
    }
}

onMounted(() => {
    const loadingTask = createLoadingTask(state.source);
    loadingTask.promise.then((pdf:{numPages: number}) => {
        state.numPages = pdf.numPages;
    });
});
</script>

<style lang="css" scoped>
.page-tool {
    position: absolute;
    bottom: 35px;
    padding-left: 15px;
    padding-right: 15px;
    display: flex;
    align-items: center;
    background: rgb(66, 66, 66);
    color: white;
    border-radius: 19px;
    z-index: 100;
    cursor: pointer;
    margin-left: 50%;
    transform: translateX(-50%);
}
.page-tool-item {
    padding: 8px 15px;
    padding-left: 10px;
    cursor: pointer;
}

</style>

效果显示