Resolving the jsPDF Error – Font does not exist in vFS (VueJs)

Introduction

Troubleshooting code issues is an essential part of the development process, and sometimes, unexpected errors can arise. In this blog post, we’ll explore a common problem encountered when using jsPDF in a Vue.js application: the “Font does not exist in vFS” error. We’ll guide you through the process of resolving this issue and successfully generating PDFs with custom fonts.

Identifying the Issue

When attempting to create a PDF in your Vue app with a custom font using jsPDF, you may come across the “Font does not exist in vFS” error. This error indicates that the custom font is not being recognized by jsPDF, leading to unexpected behavior and rendering issues in the generated PDF.

Font Conversion

To begin, download the desired font and convert it to base64 format using the provided ‘/fontconverter/fontconverter.html’ tool from the jsPDF GitHub repository. Once the font is converted, ensure that you have the necessary files: the .ttf file of the custom font and the corresponding .js file.

Setting Up the Font Files

Create a new folder called ‘fonts’ in your project directory. Place both the .ttf file and the .js file inside this folder. Having the font files organized in a separate folder helps maintain a clean project structure.

Implementing the Download Function

Within your Vue component or script, create a method called downloadPdf(). This method will handle the PDF generation process. Here’s an example code snippet to get you started:

code


















const doc = new jsPDF();
doc.setFontSize(28);

// Default font
doc.text(20, 30, 'This is the default font.');

// Custom font - Courier Normal
doc.setFont('courier');
doc.setFontType('normal');
doc.text(20, 60, 'This is Courier Normal.');

// Custom font - Roboto Regular
doc.addFileToVFS("./fonts/Roboto-Regular.ttf", './fonts/Roboto-Regular-normal.js');
doc.addFont("./fonts/Roboto-Regular.ttf", "Roboto", "normal");
doc.setFont("Roboto");
doc.text("Reinier van der Galien", 20, 90);

console.log(doc.getFontList());
doc.save("customFonts.pdf");

Troubleshooting the Error

After implementing the code, you may still encounter the “Font does not exist in vFS” error. This indicates that the font inclusion process has not been successful. Here are a few troubleshooting steps to follow:

1. Verify that the paths to the font files are correct.
2. Double-check the content of the .js file obtained from the font converter. Ensure that it includes the necessary font string.
3. Make sure that the font constant and file name passed to addFileToVFS and addFont methods match.

Resolving the Error

If the error persists, try the following solution:

1. Import the font files into your Vue component or script using import statements.
2. Associate the font files with their corresponding variables or constants.
3. Use the addFileToVFS and addFont methods to add the fonts to the jsPDF document. Ensure that the font names and file names match.

Here’s an example of how to import and use the font files in your code:

code










import Roboto from '@/assets/fonts/Roboto-Regular-normal.js';
import RobotoBold from '@/assets/fonts/Roboto-Bold-bold.js';

// ...

let doc = new jsPDF();
doc.addFileToVFS('Roboto-Regular.ttf', Roboto);
doc.addFileToVFS('Roboto-Bold.ttf', RobotoBold);
doc.addFont('Roboto-Regular.ttf', 'Roboto', 'normal');
doc.addFont('Roboto-Bold.ttf', 'Roboto', 'bold');
doc.setFont('Roboto');

Conclusion

In this blog post, we explored the common error “Font does not exist in vFS” that can occur when using jsPDF in a Vue.js application. By following the troubleshooting steps outlined above, you should be able to resolve the issue and successfully generate PDFs with custom fonts.

Remember, troubleshooting code issues requires patience and attention to detail. By understanding the process and following the steps, you can overcome obstacles and create exceptional PDFs in your Vue.js applications.