javascript - 将组件反应为 PDF

Question

我正在开发一项功能，该功能将允许用户完成他们管道的最后阶段并从中获得漂亮的 PDF。

我的服务器和客户端都玩得很好。我一直无法完成的是将整个文档放入 pdf 中。它只捕获一小部分。

我不需要多个页面，尽管那会很好。无论渲染多长时间，我只想捕获所有内容。有可能有 100 个项目，例如图像和旁边的复选框。我需要一个完整的 pdf，到目前为止我只能得到其中一小部分的快照。

我尝试搞乱高度选项和各种包裹，但绝对没有运气。

我将提供 renderSimpleForm 最终在浏览器上的样子。以及它作为 PDF 出现的内容。

---

代码和图像

---

import { jsPDF } from "jspdf";
import * as htmlToImage from 'html-to-image';

        const handleSubmit = () => {
            // //Before sending the action show in progress text and disable button
            setPdf({inProgress: true})

            //Creating the pdf blob
            htmlToImage.toPng(document.getElementById('simpleForm'))
            .then(function (dataUrl) {
              var link = document.createElement('a');
              link.download = 'my-image-name.jpeg';
              const pdf = new jsPDF('p', 'mm', 'a4');
              const imgProps= pdf.getImageProperties(dataUrl);
              pdf.addImage(dataUrl, 'PNG', 0, 0);
              //Send action to server
              ClassInstancesActions.StorePassportPDFToDisk(pdf.output('blob'), productID)
            });
        }

        return (
            <div id="simpleForm" style={{ height: '9999px !important', width: '9999px !important' }}>
                {renderSimpleForm()}
                {showError()}
                {renderSubmitCancel(disableSubmit)}
            </div>
        );
    };

这是我的 SUMIT 按钮的输出 这是它在浏览器上的显示方式

标签： javascriptreactjspdfjspdfreact-to-pdf

Answer 1

好的，一段时间后，我有一个适合我需求的解决方案：

1. 指向 React 组件中的 div，然后将其 pdf
2. 保留样式

和额外的：

1. 能够以编程方式自定义和控制数据库中的元数据
2. 自定义是添加页眉、页脚、页码、首页，我可以在技术上控制每一页

我使用了 https://www.npmjs.com/package/@progress/kendo-react-pdf

我使用了它的 savePDF 函数，它允许我也有一个模板创建类型的功能，因为它是免费的，并且作为你将在代码中看到的选项参数中的道具传递。

还有一个 css 选择器，它只针对已传递的 PDF 的 div，无需指定要显示的内容和不显示的内容，因此您可以在 PDF 完全从这里出来之前实际操作它。

在视频演示中，您会看到我有一个超过 40 页的 MASSIVE div！保留了我的材质和 CSS 样式，我可以随意添加任何我想要的东西。我什至加了水印！

希望这可以帮助人们！

//component that has the div i need pdf'ed
//

var reactToPdfUtils = require('../../../../../reactToPdf.js');

    const handleSave = (sourceElement) => {
        console.log('handleSave in SFV!');
        reactToPdfUtils.useSavePDFNOW(pdfProps, cb, sourceElement)
        function cb(sendDataContent){   
            console.log(sendDataContent)
        }
    };
    
//////////////////////////////////////////////////////////////////////////////////////////////



//reactToPdf.js      file that houses the library function I manipulate to get the result


import React, { useEffect } from 'react';
import { savePDF } from '@progress/kendo-react-pdf';
import { drawDOM, exportPDF } from '@progress/kendo-drawing';

export const useSavePDFNOW = (pdfProps, cb, sourceElement) => {
    //pdfprops i pass in from meta data in my mongoDB, 
    //I made a cb to let me know when the funtion is done
    //I also do elaborate checking here myself for example
    //to make sure there is only one div that that id 
   
        //create a template
        //this function is declared then passed in later to savePDF, 
        //the magic in the library allows    you to manipulate each page if you wanted. You can do some         //cool stuff here.
 try {
        const onEveryPage = (props) => {
            if (hasAfirstPage) {
                if (props.pageNum === 1) {
                    document.querySelectorAll('#toPDF')[0].style.cssText = 'margin-top: -188.333px;height:100%;';
                    // document.querySelectorAll('kendo-pdf-page')[0].style.cssText = '';
                    return <Fragment></Fragment>;
                } else {
                    return (
                        <div style={{ zIndex: '-999999', justifyContent: 'center', display: 'flex' }}>
                            <div id='header' style={{ textAlign: 'center', fontSize: headerFontToUse + 'px', backgroundRepeat: 'no-repeat', backgroundSize: '100%', backgroundColor: 'transparent', height: headerHeightToUse, width: headerWidthToUse, backgroundImage: `url(${headerSrcToUse})`, position: 'absolute', top: 10 }}>
                                {headerTextToUse}
                            </div>
                            <div id='watermarkImage' style={{ backgroundRepeat: 'no-repeat', backgroundSize: '100%', backgroundColor: 'transparent', height: waterMarkHeightToUse, width: headerWidthToUse, opacity: 0.5 /* Firefox, Chrome, Safari, Opera, IE >= 9 (preview) */, backgroundImage: `url(${waterMarkSrcToUse})`, position: 'absolute', bottom: -90, left: 300 }}></div>
                            <div id='pageNums' style={{ position: 'absolute', bottom: 0, right: '10px' }}>
                                Page {props.pageNum} of {props.totalPages}
                            </div>
                            <h6 id='footer' style={{ fontSize: footerFontToUse + 'px', backgroundColor: 'transparent', position: 'absolute', bottom: 0, margin: '6 auto' }}>
                                {footerTextToUse}
                            </h6>
                        </div>
                    );
                }
            } else {
                return (
                    <div style={{ zIndex: '-999999', justifyContent: 'center', display: 'flex' }}>
                        <div id='header' style={{ textAlign: 'center', fontSize: headerFontToUse + 'px', backgroundRepeat: 'no-repeat', backgroundSize: '100%', backgroundColor: 'transparent', height: headerHeightToUse, width: headerWidthToUse, backgroundImage: `url(${headerSrcToUse})`, position: 'absolute', top: 10 }}>
                            {headerTextToUse}
                        </div>
                        <div id='watermarkImage' style={{ backgroundRepeat: 'no-repeat', backgroundSize: '100%', backgroundColor: 'transparent', height: waterMarkHeightToUse, width: headerWidthToUse, opacity: 0.5 /* Firefox, Chrome, Safari, Opera, IE >= 9 (preview) */, backgroundImage: `url(${waterMarkSrcToUse})`, position: 'absolute', bottom: -90, left: 300 }}></div>
                        <div id='pageNums' style={{ position: 'absolute', bottom: 0, right: '10px' }}>
                            Page {props.pageNum} of {props.totalPages}
                        </div>
                        <h6 id='footer' style={{ fontSize: footerFontToUse + 'px', backgroundColor: 'transparent', position: 'absolute', bottom: 0, margin: '6 auto' }}>
                            {footerTextToUse}
                        </h6>
                    </div>
                );
            }
        };
        //MaterialUI font fixing may have to do this elsewhere too specific
        parentWrapper.querySelectorAll('[class*=MuiTypography], [class*=Text], [class*=formControl]').forEach(function (el, i) {
            el.setAttribute('style', 'color: black; overflow: visible');
        });

        //save pdf on client side, send blob to dev to figure out what he or she wants to do with it
        let pdfBlob;
        savePDF(
            parentWrapper,
            {
                pageTemplate: onEveryPage,
                paperSize: 'a4',
                fileName: 'Testing',
                keepTogether: '.menu',
                scale: 0.6,
                title: 'Ametek/Powervar Passport',
                margin: { top: marginTopToUse, bottom: marginBottomToUse }
            },
            () => {
                // Server side rendering tested comes out exactly the same so long as the props match
                drawDOM(parentWrapper, { pageTemplate: onEveryPage, scale: 0.6, paperSize: 'A4', margin: { top: 180, bottom: 10 } })
                    .then((group) => {
                        return exportPDF(group);
                    })
                    .then((dataUri) => {
                        // Send action to database
                        pdfBlob = dataUri.split(';base64,')[1];
                        ClassInstancesActions.StorePassportPDFToDisk(pdfBlob, 'testing');
                        cb(pdfBlob);
                        parentWrapper.remove();
                    });
            }
        );
    } catch (error) {
        console.log(error);
    }
};

//This is in a style sheet
//i have a div within the div I pdf with an id of #divToDisableInteraction
//As long as there in there you can do any css magic to your pdf document here
//I tested this to high heaven you can get most things done here
//including adding an image url


kendo-pdf-document #divToDisableInteraction {
    visibility: hidden;
  }