vue3中vue-pdf-embed实现放大、缩小、上一页、下一页、滚动翻页功能（pdf文件预览）

1.安装插件

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

2.完整代码

<template><div class="pdf-wrap scrollbar-style"><vue-pdf-embed :source="state.source" v-if="state.pdfShow" :style="scaleFun" class="vue-pdf-embed" ref="vuePdfRef" :page="state.pageNum" @wheel.prevent="handleScroll"/></div><div class="page-tool"><div class="page-tool-item" @click="lastPage">上一页</div><div class="page-tool-item">{{state.pageNum}}/{{state.numPages}}</div><div class="page-tool-item" @click="nextPage">下一页</div><div class="page-tool-item" @click="pageZoomOut">放大</div><div class="page-tool-item" @click="pageZoomIn">缩小</div><div class="page-tool-item" @click="PDFPrint">下载</div></div>
</template>
<script setup>
import { reactive, onMounted, computed } from "vue";
import VuePdfEmbed from "vue-pdf-embed";
import { createLoadingTask } from "vue3-pdfjs/esm";
import { debounce } from "@/utils/handleDebounce"; // 防抖方法const props = defineProps({pdfUrl: {type: String,required: true}
})
const scaleFun = computed(() => `transform:scale(${state.scale});margin-top:2%`)
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pdfShow: true, // pdf是否显示
});
const vuePdfRef =ref(null)
// 上一页
function lastPage() {if (state.pageNum > 1) {state.pageNum -= 1;}
}
// 下一页
function nextPage() {if (state.pageNum < state.numPages) {state.pageNum += 1;}
}
// 放大
function pageZoomOut() {if (state.scale < 2) {state.scale += 0.1;}
}
// 缩小
function pageZoomIn() {if (state.scale > 1) {state.scale -= 0.1;}
}
// 打印/下载
function PDFPrint() {vuePdfRef.value.print(300,'合同',true); // 打印：参数1为分辨率 参数2为文件名称 参数3为是否打印所有页面// vuePdfRef.value.download('合同'); // 下载：参数为文件名称。我这里会报错可能是有方法冲突了
}
// 滚轮滚动
const handleScroll = debounce((event) => {event.preventDefault(); // 阻止默认的滚动行为,这里不知为什么不起效,所以直接使用@wheel.prevent// 判断是否是ctrl+滚轮if (event.ctrlKey) { // 是ctrl+滚轮就放大缩小页面if (event.deltaY > 0) {pageZoomOut();} else if (event.deltaY < 0) {pageZoomIn();}} else { // 不是就滑动滚轮来翻页event.wheelDeltaY < 0 ? nextPage() : lastPage();}
}, 50)
onMounted(() => {const loadingTask = createLoadingTask(state.source);loadingTask.promise.then((pdf) => {state.numPages = pdf.numPages;});
});
</script>
<style lang="scss" scoped>
.pdf-preview {position: relative;height: 100vh;padding: 20px 0;box-sizing: border-box;background: rgb(66, 66, 66);
}
.vue-pdf-embed {text-align: center;width: 515px;border: 1px solid #e5e5e5;margin: 0 auto;box-sizing: border-box;
}
.pdf-wrap{overflow-y:auto ;
}.page-tool {position: absolute;bottom: 35px;padding-left: 15px;padding-right: 15px;display: flex;align-items: center;background: rgba(3, 67, 109, 0.075);color: rgba(2, 1, 41, 0.507);border-radius: 19px;z-index: 100;cursor: pointer;margin-left: 52%;transform: translateX(-50%);
}
.page-tool-item {padding: 8px 15px;padding-left: 10px;cursor: pointer;
}
</style>