vue pdf导出 html2canvas+jspdf

第一个.将页面html转换成图片 npm install --save html2canvas

第二个.将图片生成pdf npm install jspdf --save

官方文档  http://html2canvas.hertzen.com/

// 导出页面为PDF格式
import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'
export default{
install (Vue) {

Vue.prototype.getPdf = function () {
var title = this.htmlTitle
html2Canvas(document.querySelector('#pdfDom'), {
useCORS: true,    //如果有图片跨域CORS策略 就是加上
scale:1.3          //如果得到PDF模糊可以设成1.3，或2  这样文件大小对应也会变大
}).then(function (canvas) {

let contentWidth = canvas.width
let contentHeight = canvas.height
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()
}
}
}
PDF.save(title + '.pdf')
}
)
}
}
}