1. Installation dependencies
The following two dependencies are mainly used:
html2canvas: By obtaining an element of HTML and then generating a Canvas, users can save it as a picture.
jspdf: HTML5-based client-side solution for generating PDF documents for various purposes.
npm install html2canvas jspdf --save
2. How to use
The following is used locally
/ 导出页面为PDF格式
import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'
export default{
install (Vue, options) {
Vue.prototype.getPdf = function () {
//获取页面标题，作为文件名称，也可以使用时间戳生成不重复的文件名使用
var title = this.htmlTitle
html2Canvas(document.querySelector('#pdfDom'), {
allowTaint: true,
//防止页面过宽导致右侧出现黑灰色背景区域
scale: 2
}).then(function (canvas) {
let contentWidth = canvas.width
let contentHeight = canvas.height
//A4纸张标准宽高进行转换
let pageHeight = contentWidth / 592.28 * 841.89
let leftHeight = contentHeight
let position = 0
let imgWidth = 595.28
let imgHeight = 592.28 / contentWidth * contentHeight
let pageData = canvas.toDataURL('image/jpeg', 1.0)
let PDF = new JsPDF('', 'pt', 'a4')
if (leftHeight < pageHeight) {
PDF.addImage(pageData, 'JPEG', 0, 0, imgWidth, imgHeight)
} else {
while (leftHeight > 0) {
PDF.addImage(pageData, 'JPEG', 0, position, imgWidth, imgHeight)
leftHeight -= pageHeight
position -= 841.89
if (leftHeight > 0) {
PDF.addPage()
}
}
}
//文件导出生成
PDF.save(title + '.pdf')
}
)
}
}
}
It can also be introduced in the global main.js file and mounted globally:
import htmlToPdf from '@/components/utils/htmlToPdf'
// 使用Vue.use()方法就会调用工具方法中的install方法
Vue.use(htmlToPdf)
3. Call the export method in the page to export and download files
1. The page label elements are as follows:
<div id="pdfDom">
<!-- 要下载的HTML页面,页面是由后台返回 -->
<div v-html="pageData" class="markdown-body"></div>
</div>
<el-button type="primary" size="small" @click="getPdf('#pdfDom')">点击下载</el-button>
2. The js part of the page is as follows:
export default {
data () {
return {
htmlTitle: '页面导出PDF文件名'
}
}
}
The above content is reproduced at: https://www.cnblogs.com/guobin-/p/14451837.html
Supplement: You can add padding to the content container to beautify the printing result:
.markdown-body{
width:70%;
margin:50px auto;
padding:50px 30px;//打印页面四周留白
}