html导出pdf(vue中可用)
1、插件安装
npm install html2canvas --save
npm install jspdf --save
<script src="https://cdn.bootcss.com/jspdf/1.3.4/jspdf.debug.js"></script>
2、注册一个全局可用的导出方法
// 导出页面为PDF格式
import html2canvas from 'html2canvas'
export default {
install(Vue, options) {
Vue.prototype.ExportSavePdf = function(htmlTitle, currentTime) {
var element = document.getElementById('pdfCentent')
html2canvas(element, {
logging: false
}).then(function(canvas) {
var pdf = new jsPDF('p', 'mm', 'a4') // A4纸,纵向
var ctx = canvas.getContext('2d')
var a4w = 170
var a4h = 280 // A4大小,210mm x 297mm,四边各保留20mm的边距,显示区域170x257
var imgHeight = Math.floor(a4h * canvas.width / a4w) // 按A4显示比例换算一页图像的像素高度
var renderedHeight = 0
while (renderedHeight < canvas.height) {
var page = document.createElement('canvas')
page.width = canvas.width
page.height = Math.min(imgHeight, canvas.height - renderedHeight)// 可能内容不足一页
// 用getImageData剪裁指定区域,并画到前面创建的canvas对象中
page.getContext('2d').putImageData(ctx.getImageData(0, renderedHeight, canvas.width, Math.min(imgHeight, canvas.height - renderedHeight)), 0, 0)
pdf.addImage(page.toDataURL('image/jpeg', 1.0), 'JPEG', 10, 10, a4w, Math.min(a4h, a4w * page.height / page.width)) // 添加图像到页面,保留10mm边距
renderedHeight += imgHeight
if (renderedHeight < canvas.height) {
pdf.addPage()
}// 如果后面还有内容,添加一个空页
// delete page;
}
pdf.save(htmlTitle + currentTime)
})
}
}
}
3、组件内要导出PDF
<div id="pdfCentent">
我是导出pdf里面的内容
<div @click="ExportSavePdf(htmlTitle,nowTime)">导出导出</div>
</div>
4、ie浏览器目前不支持下载,原因是不支持一些方法,感兴趣的可看下这篇文章
https://blog.csdn.net/hongyu_789/article/details/80494156
https://www.iteye.com/topic/376590
5.在vue的组件里面做了一个小demo:
<template>
<div class="three">
<div id="pdfCentent">
我是导出pdf里面的内容
<el-button @click="ExportSavePdf(htmlTitle,nowTime)" type="primary">导出</el-button>
</div>
</div>
</template>
<script>
import html2canvas from 'html2canvas'
import jsPDF from 'jspdf'
export default {
components: {},
data() {
return {
};
},
methods:{
ExportSavePdf(htmlTitle, currentTime){
var element = document.getElementById('pdfCentent')
html2canvas(element, {
logging: false
}).then(function(canvas) {
var pdf = new jsPDF('p', 'mm', 'a4') // A4纸,纵向
var ctx = canvas.getContext('2d')
var a4w = 170
var a4h = 280 // A4大小,210mm x 297mm,四边各保留20mm的边距,显示区域170x257
var imgHeight = Math.floor(a4h * canvas.width / a4w) // 按A4显示比例换算一页图像的像素高度
var renderedHeight = 0
while (renderedHeight < canvas.height) {
var page = document.createElement('canvas')
page.width = canvas.width
page.height = Math.min(imgHeight, canvas.height - renderedHeight)// 可能内容不足一页
// 用getImageData剪裁指定区域,并画到前面创建的canvas对象中
page.getContext('2d').putImageData(ctx.getImageData(0, renderedHeight, canvas.width, Math.min(imgHeight, canvas.height - renderedHeight)), 0, 0)
pdf.addImage(page.toDataURL('image/jpeg', 1.0), 'JPEG', 10, 10, a4w, Math.min(a4h, a4w * page.height / page.width)) // 添加图像到页面,保留10mm边距
renderedHeight += imgHeight
if (renderedHeight < canvas.height) {
pdf.addPage()
}// 如果后面还有内容,添加一个空页
// delete page;
}
pdf.save(htmlTitle + currentTime)
})
}
}
};
</script>
<style lang="less">
.three{
padding: 30px;
width:100%;
height: 100%;
}
</style>
效果: