vue 前端實現pdf下載.npm install html2canvas jspdf --save

npm install html2canvas jspdf --save

 

// 頁面使用
<div id='pdfDom'>
...........
</div>
<el-button @click="getPdf('#pdfDom')">下載測試</el-button>

// main.js 檔案
import htmlToPdf from './plugins/utils/htmlToPdf';
Vue.use(htmlToPdf);

/**
 * 匯出頁面為PDF格式
 *  */ 
import html2Canvas from 'html2canvas'
import JsPDF from 'jspdf'
export default {
    install(Vue, options) {
        Vue.prototype.getPdf = function () {
            var title = this.htmlTitle
            html2Canvas(document.querySelector('#pdfDom'), {
                allowTaint: true
            }).then(function (canvas) {
                let contentWidth = canvas.width   // 獲得該容器的寬
                let contentHeight = canvas.height   // 獲得該容器的高
                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')  // A4紙，縱向
                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')
            })
        }
    }
}