Theme functions

---

The theme functions are a way to customize the look and add some logic to your CV Theme. You can use them in your theme template to help you display the content of your CV.

Functions

inc - Increment a number

The inc function is used to increment a number. It can also be used to get the next item of a list.

Code	Output
{{ inc 5 }}	6
{{ inc 0 }}	1
{{ inc $length }}	$length + 1

dec - Decrement a number

The dec function is used to decrement a number. It can also be used to get the last item of a list.

Code	Output
{{ dec 5 }}	4
{{ dec 0 }}	-1
{{ dec $length }}	$length - 1

Last item of a list

{{ $list := (list "a" "b" "c") }}
{{ index $list (dec (len $list)) }}

This code will output c.

list - Create a list

The list function is used to create a list of items.

Code	Output
{{ list 1 2 3 }}	[1 2 3]
{{ list "a" "b" "c" }}	[a b c]
{{ list "CV" "Wonder" }}	[CV Wonder]

join - Concatenate strings

The join function is used to concatenate a list of strings without or with a separator.

Code	Output
{{ join (list "CV" "Wonder") "" }}	CVWonder
{{ join (list "CV" "Wonder") " " }}	CV Wonder
{{ join (list "a" "b" "c") " " }}	a b c
{{ join (list "1" "2" "3") "-" }}	1-2-3

split - Split a string

The split function is used to split a string into a list of substrings.

Code	Output
{{ split "CV Wonder" " " }}	[CV Wonder]
{{ split "CV-Wonder" "-" }}	[CV Wonder]
{{ split "1-2-3" "-" }}	[1 2 3]

trim - Remove leading/trailing whitespaces

The trim function is used to remove leading and trailing whitespace from a string.

Code	Output
{{ trim " CV Wonder " }}	CV Wonder
{{ trim " CV Wonder " }}	CV Wonder
{{ trim " CV Wonder " }}	CV Wonder

lower - String to lowercase

The lower function is used to convert a string to lowercase.

Code	Output
{{ lower "CV Wonder" }}	cv wonder
{{ lower "CVWONDER" }}	cvwonder
{{ lower "cv wonder" }}	cv wonder

upper - String to uppercase

The upper function is used to convert a string to uppercase.

Code	Output
{{ upper "CV Wonder" }}	CV WONDER
{{ upper "cvwonder" }}	CVWONDER
{{ upper "cv wonder" }}	CV WONDER
{{ upper "CV WONDER" }}	CV WONDER

replace - Replace a substring

The replace function is used to replace a substring in a string.

Code	Output
{{ replace "Hello World" "World" "CV Wonder" }}	Hello CV Wonder
{{ replace "Hello World" "World" "" }}	Hello

odd - Check if a number is odd

The odd function is used to check if a number is odd.

Code	Output
{{ odd 1 }}	true
{{ odd 2 }}	false
{{ odd 3 }}	true

even - Check if a number is even

The even function is used to check if a number is even.

Code	Output
{{ even 1 }}	false
{{ even 2 }}	true
{{ even 3 }}	false

add - Add two numbers

The add function is used to add two numbers.

Code	Output
{{ add 1 2 }}	3
{{ add 2 3 }}	5
{{ add 10 2 }}	12

sub - Subtract two numbers

The sub function is used to subtract two numbers.

Code	Output
{{ sub 1 2 }}	-1
{{ sub 2 3 }}	-1
{{ sub 10 2 }}	8

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qrCode - Generate an inline QR code

The qrCode function generates a QR code from a URL and returns an HTML <img> tag with the image embedded as a PNG base64 data URI. The QR code is produced at render time — no network requests, no external files. It works in both HTML and PDF output.

Returns an empty string when url is empty, so it is safe to call directly against model fields.

Signature:

{{ qrCode <url> [options...] }}

Options are "key=value" strings passed after the URL:

Option	Description	Default	Values
size	Pixels per QR cell	5	Integer (1–255)
fg	Foreground (module) color	#000000	Hex color (#RRGGBB)
bg	Background color	#ffffff	Hex color (#RRGGBB)
ec	Error correction level	M	L (7%) / M (15%) / Q (25%) / H (30%)

Total image size

size sets the width of each individual QR cell in pixels, not the total image width. The total size depends on the URL length (longer URLs require a higher QR version and more cells). For pixel-perfect layouts, wrap the output in a fixed-size <div> controlled by CSS.

Code	Description
{{ qrCode .Person.Site }}	QR code with all defaults
{{ qrCode .Person.Site "size=6" }}	Larger cells
{{ qrCode .Person.Site "fg=#0077b5" }}	Blue modules (LinkedIn brand color)
{{ qrCode .Person.Site "bg=#f5f5f5" }}	Light grey background
{{ qrCode .Person.Site "ec=H" }}	Highest error correction (30%)

Typical usage in a theme:

{{/* Portfolio QR code in the header — only shown when a site URL is set */}}
{{ if .Person.Site }}
  <div class="qr-contact">
    {{ qrCode .Person.Site "size=5" "fg=#333333" }}
    <span>Portfolio</span>
  </div>
{{ end }}

{{/* LinkedIn QR code with brand color in the sidebar */}}
{{ if .SocialNetworks.Linkedin }}
  {{ qrCode (printf "https://linkedin.com/in/%s" .SocialNetworks.Linkedin) "size=5" "fg=#0077b5" }}
{{ end }}

{{/* High error correction for a small QR in a logo-heavy layout */}}
{{ qrCode .Person.Site "size=4" "fg=#222222" "ec=H" }}

PDF support

QR codes generated by qrCode are embedded as data URIs and render correctly in PDF output produced by cvwonder generate --export=pdf.

Missing functions

If you need a function that is not available in CV Wonder, you can ask us to add it on Github Issues. We will be happy to help you.