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Manchmal müssen Sie die Tabellen oder Daten Ihrer App als PDF speichern, um sie einfacher teilen zu können. Mit React PDF Renderer können Sie Ihre React-Komponenten ganz einfach in hochwertige PDFs umwandeln. In diesem Blog erfahren Sie, wie Sie Ihre Webinhalte ganz einfach in gemeinsam nutzbare PDFs umwandeln können.
React PDF Renderer verfügt über einen eigenen Satz an Komponenten, die sich ein wenig von regulären React-Komponenten oder HTML-Tags unterscheiden. Die Funktionsweise ist jedoch leicht zu verstehen. Sobald Sie die Grundlagen erlernt haben, können Sie React PDF Renderer effizient verwenden, um PDFs in Ihren React-Apps zu erstellen. Bevor wir uns mit dem Code befassen, schauen wir uns zunächst die Hauptkomponenten an, die von React PDF Renderer bereitgestellt werden, und sehen, wie sie funktionieren.
Mit diesen Grundlagen sind Sie bereit, mit der Konvertierung Ihrer React-Komponenten in PDFs zu beginnen.
React PDF Renderer verwendet verschiedene Komponenten, um Sie bei der Konvertierung von React-Komponenten in PDFs zu unterstützen. Hier sind die wichtigsten Komponenten und ihre Verwendung:
Komponente anzeigen:
<View style={{ width: 100, height: 50, backgroundColor: 'blue' }} > /* pdf content */ </View>
Textkomponente:
<Text style={{ fontSize: 14, fontWeight: 'bold', color: 'black' }}> Hello, World! </Text>
Bildkomponente:
<Image src="example.jpg" style={{ width: 200, height: 100 }} />
Seitenkomponente:
<Page size="A4" style={{ margin: 10 }}>Page Content</Page>
Link-Komponente:
<Link src="https://example.com" style={{ color: 'blue' }}> Click here </Link>
Dokumentkomponente:
<Document title="Example Document"> <Page> <Text> Content </Text> </Page> </Document>
Dies sind die Grundkomponenten, die bei der Arbeit mit React PDF verwendet werden. Eine vollständige Liste der Komponenten mit verfügbaren gültigen Requisiten finden Sie hier.
Sie können mit der Erstellung Ihrer PDFs in Ihrer vorhandenen App beginnen oder eine Online-REPL speziell für React PDF verwenden. Der Vorteil einer Online-React-PDF-REPL besteht darin, dass wir sofort die Vorschau unseres Codes sehen können. Ohne dieses Vorschausystem müssten wir das PDF jedes Mal herunterladen, um es anzuzeigen.
Daher werden wir die Online-REPL für React PDF verwenden, da wir damit unsere Codeänderungen sofort in der Vorschau anzeigen können. Diese Vorschaufunktion ist beim Erstellen einer PDF-Datei großartig, da sie Zeit spart und uns hilft, Fehler frühzeitig zu erkennen. Allerdings werde ich auch erläutern, wie Sie React PDF in Ihrer React-Anwendung einrichten können.
Lassen Sie uns eine neue React-Anwendung erstellen, React PDF Renderer installieren und unsere erste Codezeile damit schreiben.
Öffnen Sie Ihr Terminal und führen Sie den folgenden Befehl aus, um mit „React App erstellen“ eine neue React-App zu erstellen
npx create-react-app my-react-pdf-app
Dieser Befehl erstellt ein neues Verzeichnis mit dem Namen my-react-pdf-app mit einem grundlegenden React-Setup.
cd my-react-pdf-app
Verwenden Sie npm, um die React PDF Renderer-Bibliothek zu installieren.
npm install @react-pdf/renderer
Öffnen Sie das neu erstellte Projekt (my-react-pdf-app) in Ihrem bevorzugten Code-Editor (wie VSCode). Erstellen Sie eine neue Datei mit dem Namen MyDocument.js im src-Verzeichnis.
// src/MyDocument.js import React from 'react'; import { Document, Page, Text, View, StyleSheet } from '@react-pdf/renderer'; // Create styles const styles = StyleSheet.create({ page: { flexDirection: 'column', backgroundColor: '#E4E4E4', }, section: { margin: 10, padding: 10, flexGrow: 1, }, }); // Create Document Component const MyDocument = () => ( 5e4f0452c956abb82e6662046a0f6630 f62a09f3ac49e1b121eab0a662e707ab 65c25a3ac84fa161f59dba223913d55d 7afbc23223af17d69e2ad2a4e42c6248Section #1b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc 65c25a3ac84fa161f59dba223913d55d 7afbc23223af17d69e2ad2a4e42c6248Section #2b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc 768cdee1b4b725a4a4a773fe2d988b48 e4a958d5d76049640eeb8862309d22ea ); export default MyDocument;
Öffnen Sie App.js und ändern Sie es, um das PDF-Dokument zu rendern.
// src/App.js import React from 'react'; import { PDFDownloadLink } from '@react-pdf/renderer'; import MyDocument from './MyDocument'; const App = () => ( d7ae34ce73578a20fe774d5bff7fdec1 52a0d453c6b753de18addead7faa5270 2a5e2cb62ffa546b17d950c2d80a5565} fileName="mypdf.pdf"> {({ blob, url, loading, error }) => loading ? 'Loading document...' : 'Download PDF now!' } a2e48c1b8615792ef118bf94ebf72b0f ab946e7546ab66a280dd9c9f9310ecd5 16b28748ea4df4d9c2150843fecfba68 ); export default App;
Öffnen Sie Ihr Terminal, stellen Sie sicher, dass Sie sich im Projektverzeichnis befinden, und starten Sie den Entwicklungsserver.
npm start
Your default browser should automatically open and navigate to http://localhost:3000, where you will see a link to download the PDF.
But in this blog, we will use an Online Code REPL so that we can see the output instantly. Then, we can use the same code in our React app to download it. Both methods will give the same result.
So, we are going to code this PDF design. With this design, we will understand how all the components work. After that, you can code any PDF design.
So, till now, we understand that there are three major components for React PDF:
This PDF design is also divided into these three main components.
So, from the above diagram, I hope you understand what we need to build first. First, we will create a document using the 5e4f0452c956abb82e6662046a0f6630 component. Then, we will declare a 9bf8075cc227fc55eb2ec8dec5c506d4, and after that, we will declare a 548e7793df275d156d270cdda504ba19 and start defining our components there.
Basic Setup
Start with importing basic things and components we need to use for React PDF.
import React from 'react'; import { Page, Text, View, Document, StyleSheet, Image } from '@react-pdf/renderer';
Document Styling
Now we will style our document. Here, we will set how our entire document looks. We will use StyleSheet.create to define the styles for our PDF components. This is similar to CSS but written in JavaScript objects:
const styles = StyleSheet.create({ page: { padding: 20, backgroundColor: '#ffffff' }, section: { marginBottom: 20 } }); // we will add more style later on.
Here, we will use the page and section styles in our components like this.
164ad81a262e166f89474676f68481d7
Define Data
Define the data you want to display in the PDF document. This data can be dynamic and fetched from an API or a database:
const data = [ { title: 'Attack on Titan', studio: 'Wit Studio', genre: 'Action, Dark Fantasy', releaseDate: '04-07-2013', status: 'Completed', rating: '9.0', cost: '$120' } ];
Create Document Component
Define the MyDocument component which will structure the PDF document. The name can be anything. It is our React component.
const MyDocument = () => { return ( // Our pdf code will be here ); }; export default MyDocument;
The component returns JSX that describes the structure of the PDF document. So, in the return statement, we will start by using our first React PDF component, which is 7d26fa5b48246651078c945a5dd27298.
const MyDocument = () => { return ( 5e4f0452c956abb82e6662046a0f6630 /* Here we will steup our page */ e4a958d5d76049640eeb8862309d22ea ); }; export default MyDocument;
This creates a Black PDF Document.
Create PDF Pages
Now, let's start by creating pages for our PDF. Use the 9bf8075cc227fc55eb2ec8dec5c506d4 component to define pages. The number of 9bf8075cc227fc55eb2ec8dec5c506d4 components will determine the number of pages. For example, if you use two 9bf8075cc227fc55eb2ec8dec5c506d4 tags, your PDF will have two pages. If you have too much data for a single page, React PDF will automatically create additional pages as needed.
The 9bf8075cc227fc55eb2ec8dec5c506d4 component has several props, such as size, which defines the page size like A4, A2, A3, etc., along with many other props. You can see all page props here.
// Create Document Component const MyDocument = () => { return ( 5e4f0452c956abb82e6662046a0f6630 f62a09f3ac49e1b121eab0a662e707ab 548e7793df275d156d270cdda504ba19 7afbc23223af17d69e2ad2a4e42c6248Hellob735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc 768cdee1b4b725a4a4a773fe2d988b48 e4a958d5d76049640eeb8862309d22ea ); }; export default MyDocument;
Here, we use the 9bf8075cc227fc55eb2ec8dec5c506d4 component and add a size prop, giving it a value. We also use the style defined in our style object. Inside the 9bf8075cc227fc55eb2ec8dec5c506d4 component, we are using the 548e7793df275d156d270cdda504ba19 component, and within that, we are using the 7afbc23223af17d69e2ad2a4e42c6248 component to display the text "Hello." The output will look like this:
So, the View component works just like a div. For example, if you want a big box in your PDF divided into specific columns, and you want to give each column a different color, you just need a few View components and some styling. If you need to add text, use the Text component. To add an image, use the Image component. Check the code and output below.
// Create styles const styles = StyleSheet.create({ page: { padding: 20, backgroundColor: '#ffffff' }, section: { marginBottom: 20 }, bigBox: { flexDirection: 'row', marginBottom: 20, borderWidth: 1, borderColor: '#000', }, column: { flex: 1, padding: 10, borderWidth: 1, borderColor: '#000', }, column1: { backgroundColor: '#ffcccc', }, column2: { backgroundColor: '#ccffcc', }, column3: { backgroundColor: '#ccccff', }, text: { fontSize: 12, }, image: { width: "auto", height: 100, }, canvas: { width: '100%', height: 100, borderWidth: 1, borderColor: '#000', backgroundColor: '#e0e0e0', } }); // Create Document Component const MyDocument = () => { return ( 5e4f0452c956abb82e6662046a0f6630 f62a09f3ac49e1b121eab0a662e707ab e083f898c6a88be4e07aab1713b82b7e 9df84018ceed6bd882576384b887180b 39954ff4c9e4db30e0ee1fc3bb4fc2adThis is a text columnb735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc ff1825fdb126314f18619f60b9c1b2de b2470f12f33ae95c3e2d32a5d643f772 3d260b73c372472a96940693fb62cbcc 19705b263d431bf38aed3ede2eb87325 a99003f66f50a5e4cc78e3fd02cbf161 39954ff4c9e4db30e0ee1fc3bb4fc2adCanvas section (Placeholder)b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc 3d260b73c372472a96940693fb62cbcc 3d260b73c372472a96940693fb62cbcc 768cdee1b4b725a4a4a773fe2d988b48 e4a958d5d76049640eeb8862309d22ea ); }; export default MyDocument;
Explanation
Here, each column is given a different background color for visual separation. The first column contains text, the second contains an image, and the third contains a placeholder for a canvas section.
So, for this, we just used the View, Text, and Image components. I hope you now understand that to create any component, we only need a few components to create a PDF in React. Now, let's return to our main design. We will use the same components and add some styling like flex, border styling, font styling, etc.
Let's create the header first. We need to use a View component as the header, apply some styles using flex, and add Image and Text components to it.
// src/MyDocument.js import React from 'react'; import { Page, Text, View, Document, StyleSheet, Image } from '@react-pdf/renderer'; // Create styles const styles = StyleSheet.create({ page: { padding: 20, backgroundColor: '#ffffff' }, section: { marginBottom: 20 }, headerContainer: { flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center', marginBottom: 20 }, headerText: { fontSize: 20, fontWeight: 'bold' }, image: { width: 50, height: 50 }, date: { fontSize: 12, textAlign: 'right' }, }); // Create Document Component const MyDocument = () => { return ( 5e4f0452c956abb82e6662046a0f6630 f62a09f3ac49e1b121eab0a662e707ab 65c25a3ac84fa161f59dba223913d55d d81020391e9a1e9e7184a59ac3fd2ec9 56eaf10c7301651cea8f447a8c5a9b2f 4c99eff61a1244fa7b73bb6939161067Anime Reportb735fb8965edb39ac28662131d16c063 26b82f871a2a216f2d655d904af97a08{new Date().toLocaleDateString()}b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc 3d260b73c372472a96940693fb62cbcc 768cdee1b4b725a4a4a773fe2d988b48 e4a958d5d76049640eeb8862309d22ea ); }; export default MyDocument;
You see, it's easy to grasp.
Let's code the table. To create tables using React PDF Renderer, we just need to use flex styling and the View and Text components. Each View component will contain one Text component, but you can add more Text components if needed.
The Main Structure
This code will create a table in a PDF document.
f3e30c3a6c14cdf9d1097ae9176a520e {/* Table Header */} 2a771865ce4bcf8501c0e7132cefe043 {/* Each Column Header */} 3b248e8febf36e71ef673d6bd1e9793f 723631ac8b1f909a8cf0faa818558df2Titleb735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc {/* More column headers... */} 3d260b73c372472a96940693fb62cbcc {/* Table Rows */} {data.map((item, index) => ( 8940b7edfa38482a1b18f3b1d2b332b2 {/* Each Column in a Row */} 3cf60c0359dc6945f5fdf28a20f40b67 e61307a8a3f08727a3101e2a080aeae4{item.title}b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc {/* More columns... */} 3d260b73c372472a96940693fb62cbcc ))} 3d260b73c372472a96940693fb62cbcc
Table Container
<View style={styles.table}>
This View acts as the main container for the entire table. The styles.table style will define how the table is displayed, like borders, padding, etc.
Table Header Row
<View style={styles.tableRow}>
This View represents a row in the table. The styles.tableRow style will apply to both the header row and each data row.
Column Headers
<View style={styles.tableColHeader}> <Text style={styles.tableCellHeader}>Title</Text> </View>
Each View inside the header row is a column header. The styles.tableColHeader style will define how the header cells look, such as their background color, borders, and text alignment. The Text component inside it contains the column's title and uses the styles.tableCellHeader style for text styling. Repeat this for each column header (e.g., Title, Studio, Genre, Release Date, Status, Rating, Cost).
Data Rows
{data.map((item, index) => ( <View style={styles.tableRow} key={index}> {/* Columns for each row */} </View> ))}
Here, we use the map function to loop over an array called data. For each item in the array, it creates a new row in the table. The key attribute helps React manage the list of items efficiently.
Columns in Data Rows
<View style={styles.tableCol}> <Text style={styles.tableCell}>{item.title}</Text> </View>
Each View inside the data row is a column. The styles.tableCol style will define the appearance of the cells in the data rows, and the Text component inside displays the actual data. The styles.tableCell style is applied to the text for consistent styling. Repeat this for each column in the data row (e.g., item.title, item.studio, item.genre, item.releaseDate, item.status, item.rating, item.cost).
Table Code
// React PDF Renderer Component import React from 'react'; import { Page, Text, View, Document, StyleSheet } from '@react-pdf/renderer'; // Create styles const styles = StyleSheet.create({ // after date styling.... table: { display: "table", width: "auto", borderStyle: "solid", borderWidth: 1, borderColor: '#bfbfbf' }, tableRow: { flexDirection: "row" }, tableColHeader: { width: "15%", borderStyle: "solid", borderWidth: 1, borderColor: '#bfbfbf', backgroundColor: '#f0f0f0' }, tableCol: { width: "15%", borderStyle: "solid", borderWidth: 1, borderColor: '#bfbfbf' }, tableCellHeader: { margin: 5, fontSize: 10, fontWeight: "bold" }, tableCell: { margin: 5, fontSize: 10 }, footerContainer: { flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center', marginTop: 20 }, footerText: { fontSize: 12 }, totalCost: { fontSize: 12, fontWeight: 'bold' } }); const data = [ { title: 'Attack on Titan', studio: 'Wit Studio', genre: 'Action, Dark Fantasy', releaseDate: '04-07-2013', status: 'Completed', rating: '9.0', cost: '$120' }, // You can add more or fetch data from an API or database ]; // Create Document Component const MyDocument = () => (); export default MyDocument; /* After header code */ <View style={styles.table}> <View style={styles.tableRow}> Title Studio Genre Release Date Status Rating {data.map((item, index) => ( Cost ))} {item.title} {item.studio} {item.genre} {item.releaseDate} {item.status} {item.rating} {item.cost}
Here, we've created a simple table with headers and data rows. Each item in the data array becomes a row in the table, and each property of the item becomes a cell in that row. The styling makes sure the table looks neat and professional in the PDF document.
Now, at the end, we can code a footer. The code below creates a footer with an image and a text displaying the total cost.
// style code after table styles... footerContainer: { flexDirection: 'row', justifyContent: 'space-between', alignItems: 'center', marginTop: 20 }, footerText: { fontSize: 12 }, totalCost: { fontSize: 12, fontWeight: 'bold' } //... After table code add footer 1973e766c157f8d31ba188d30374dca8 56eaf10c7301651cea8f447a8c5a9b2f c3fcc784b557b2f1c4fe82e26015222bTotal Cost: ${calculateTotalCost()}b735fb8965edb39ac28662131d16c063 3d260b73c372472a96940693fb62cbcc
This View acts as the main container for the footer. The styles.footerContainer style defines how the footer is displayed, including its layout, padding, margin, and alignment. The Image component displays an image, while the Text component shows the total cost.
In this blog, we covered how to use React PDF Renderer to convert React components into high-quality PDFs. We covered the key components, including Document, Page, View, Text, Image, and Link, and explained their uses and styling. We covered, creating a basic PDF document, adding pages, styling, and building complex structures like tables and footers. By following this, you can easily transform your web content into shareable PDFs using React.
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