via Virtual file system (VFS)

TL;DR

pdfmake uses a 2nd file: vfs_fonts.js for fonts (and other files) you wish to embed into your generated PDFs.

When you run command node build-vfs.js "./examples/fonts" in the pdfmake package directory a new build/vfs_fonts.js file is created containing an embedded copy of all files from the local examples/fonts subdirectory (in a key/value object pdfMake.vfs).

Detailed Instructions

To use custom fonts, 3 steps are required:

1. create a new vfs_fonts.js file containing your font files
2. assign pdfMake.addFonts(...) (or legacy pdfMake.fonts) in your javascript
3. specify the font in your doc-definition

1. create a new vfs_fonts.js containing your font files

• Install pdfmake npm install pdfmake
• Go to package directory ./node_modules/pdfmake/
• Create the examples/fonts subdirectory in your pdfmake code directory, if it doesn’t already exist.
• Copy your fonts (and other files you wish to embed) into the examples/fonts subdirectory.
• Run command node build-vfs.js "./examples/fonts". Or run node build-vfs.js to show help.
• Include your new build/vfs_fonts.js file in your code (in the same way you include pdfmake.js or pdfmake.min.js).

The above steps embeds all files from examples/fonts (into a local key/value variable pdfMake.vfs) - not only fonts. Which means you could put images in there, run node build-vfs.js "./examples/fonts, and reference them by filename in your doc-definition object.

You don’t need to reference the files in examples/fonts anymore because all files have been copied to the vfs_fonts.js.

For building script in other languages see https://github.com/pdfmake/vfs-builders.

2. assign pdfMake.addFonts(...) (or legacy pdfMake.fonts) in your javascript

In your code, before calling pdfMake.createPdf(docDefinition) set pdfMake.addFonts(...) (or legacy pdfMake.fonts) as in the example below (notice we don’t specify paths, just filenames):

pdfMake.addFonts({
  yourFontName: {
    normal: 'fontFile.ttf',
    bold: 'fontFile2.ttf',
    italics: 'fontFile3.ttf',
    bolditalics: 'fontFile4.ttf'
  },
  anotherFontName: {
    (...)
  },

  // example of usage fonts in collection
  PingFangSC: {
    normal: ['pingfang.ttc', 'PingFangSC-Regular'],
    bold: ['pingfang.ttc', 'PingFangSC-Semibold'],
  }
});

or legacy:

pdfMake.fonts = {
  yourFontName: {
    normal: 'fontFile.ttf',
    bold: 'fontFile2.ttf',
    italics: 'fontFile3.ttf',
    bolditalics: 'fontFile4.ttf'
  },
  anotherFontName: {
    (...)
  },

  // example of usage fonts in collection
  PingFangSC: {
    normal: ['pingfang.ttc', 'PingFangSC-Regular'],
    bold: ['pingfang.ttc', 'PingFangSC-Semibold'],
  }
}

The keys defined here will be used as font names in your doc-definition styles.

Each font-family defines 4 properties: normal, bold, italics and bolditalics referring to appropriate files (the ones you embedded from examples/fonts/). You should define all 4 components (even if they all point to the same font file).

By default pdfmake uses the following font structure:

pdfMake.addFonts({
  Roboto: {
    normal: 'Roboto-Regular.ttf',
    bold: 'Roboto-Medium.ttf',
    italics: 'Roboto-Italic.ttf',
    bolditalics: 'Roboto-MediumItalic.ttf'
  }
});

or legacy:

pdfMake.fonts = {
  Roboto: {
    normal: 'Roboto-Regular.ttf',
    bold: 'Roboto-Medium.ttf',
    italics: 'Roboto-Italic.ttf',
    bolditalics: 'Roboto-MediumItalic.ttf'
  }
};

Alternatively, instead of changing the global value, you can pass the fonts object directly to createPdf:

pdfMake.createPdf(docDefinition, null, fonts)

// The full signature of createPdf looks like this.
// tableLayouts, fonts and vfs are all optional - falsy values will cause
// pdfMake.tableLayouts, pdfMake.fonts or pdfMake.vfs to be used.
pdfMake.createPdf(docDefinition, tableLayouts, fonts, vfs)

3. specify the font in your doc-definition

pdfMake uses ‘Roboto’ as default font, so in order to use your font, you should specify it in your doc-definition object.

The easiest way is to set it globally in the defaultStyle

var docDefinition = {
  content: (...),
  defaultStyle: {
    font: 'yourFontName'
  }
}