carbon/eel

Some nice Eel helper for Neos.io

2.23.1 2025-07-23 18:10 UTC

Requires

• php: ^8.1
• behat/transliterator: ^1.2
• gehrisandro/tailwind-merge-php: ^1.0
• matthiasmullie/minify: ^1.3
• neos/flow: ^7.0 || ^8.0 || ^9.0

MIT

• Jon Uhlmann

• helper
• Neos
• carbon
• FUSION
• eel

README

Carbon.Eel Package for Neos CMS

BEM Helper

Generates BEM classes. The modifiers property can be a string (for one modifier), an array (e.g. ['one', 'two']), or an array with keys and values. If you have an array with keys and values (like a Fusion DataStructure) and a value is true, the key's name gets used for the modifier.

• block (string, required) The name of the block
• element (string) The name of the element, optional
• modifiers (string|array) The name of the modifiers, optional

BEM.array(block, element, modifiers)

Shortcut to Carbon.Array.BEM(block, element, modifiers)

BEM.string(block, element, modifiers)

Shortcut to Carbon.String.BEM(block, element, modifiers)

BEM.modifier(class, modifiers)

Generates a string with BEM classes. The modifiers property can be a string (for one modifier), an array (e.g. ['one', 'two']), or an array with keys and values. If you have an array with keys and values (like a Fusion DataStructure) and the value is true, the key's name gets used for the modifier.

• class (string, required) The name of the class
• modifiers (string|array) The name of the modifiers, optional

Return The string

Array Helper

Carbon.Array.BEM(block, element, modifiers)

Generates an array with BEM classes. The modifiers property can be a string (for one modifier), an array (e.g. ['one', 'two']), or an array with keys and values. If you have an array with keys and values (like a Fusion DataStructure) and the value is true, the key's name gets used for the modifier.

• block (string, required) The name of the block
• element (string) The name of the element, optional
• modifiers (string|array) The name of the modifiers, optional

Return The array

Carbon.Array.chunck(array, length, preserveKeys)

Chunks an array into arrays with length elements. The last chunk may contain less than length elements.

• array (array, required) The array to work on
• length (integer, required) The size of each chunk
• preserveKeys (bool) When set to true, keys will be preserved. Default is false, which will reindex the chunk numerically

Carbon.Array.join(array, separator)

Join the given array recursively using the given separator.

${Carbon.Array.join(array, ',')}

• array (array) The array that should be processed
• separator (string, optional) The separator between the values defaults to ,

Return The converted array as a string

Carbon.Array.extractSubElements(array, preserveKeys)

This method extracts sub-elements to the parent level.

An input array of type:

[
 element1 => [
   0 => 'value1'
 ],
 element2 => [
   0 => 'value2'
   1 => 'value3'
 ],

will be converted to:

[
   0 => 'value1'
   1 => 'value2'
   2 => 'value3'
]

• array (array) The array that should be processed
• preserveKeys (boolean, optional) Option if the key should be preserved, defaults to false

Return The converted array

Carbon.Array.intersect(array1, array2, array_)

• array1 (iterable|mixed) First array or value
• array2 (iterable|mixed) Second array or value
• array_ (iterable|mixed, optional) Optional variable list of additional arrays / values

Returns an array containing all the values of array1 that are present in all the arguments.

Carbon.Array.length(array)

The method counts elements of a given array or a countable object. Return 0 if it is not an countable object.

count = ${Carbon.Array.length(countable)}

Carbon.Array.hasKey(array, key)

Returns a boolean if the array has a specific key

bool = ${Carbon.Array.hasKey(array, key)}

Carbon.Array.hasValue(array, value)

Returns a boolean if the array has a specific value

bool = ${Carbon.Array.hasValue(array, value)}

Carbon.Array.getValueByPath(array, path)

Returns the value of a nested array by following the specified path.

value = ${Carbon.Array.getValueByPath(array, path)}

Carbon.Array.setValueByPath(array, path, value)

Sets the given value in a nested array or object by following the specified path.

array = ${Carbon.Array.setValueByPath(subject, path, value)}

Carbon.Array.check(variable)

Check if a variable is iterable and has items

Return The variable or null if it is empty or not an iterable

Carbon.Array.isCountable(variable)

Check if the given variable is countable

Return true or false

Carbon.Array.sortByItem(array, key, direction)

• array (iterable|mixed) array with arrays to sort
• key (string) Key of array to sort
• direction (string, optional) ASC or DESC. Direction of sorting
• translate (boolean, optional) If true, the key will be translated using the translation service

Return The sorted array

Date Helper

Carbon.Date.secondsUntil(string|DateTime, dateinerval)

Return seconds until the given offset or datetime. Very useful for maximumLifetime on the @cache entry.

• string (string|DateTime) DateTime (string or object) or an offset in DateInterval format starting from midnight
• dateinerval (boolean, optional) true if interval should be used or first argument should be used for the date, defaults to true

In this example, we clear the cache at midnight by adding an offset of 0 hours.

@cache {
    mode = 'cached'
    maximumLifetime = ${Carbon.Date.secondsUntil('PT0H')}
    ...
}

To get the seconds until next year, you can do it like this:

secondUntilNextYear = ${Carbon.Date.secondsUntil('first day of January next year', false)}

You can also compare date with this: (In this case, you don't need to set dateinerval to false)

compareDateToNow = ${Carbon.Date.secondsUntil(DateTimeObject)}

Return The timespan in seconds (integer)

Carbon.Date.timeToDateInterval(string)

Convert time duration (1:00) into a DateInterval

Return The duration as DateInterval

FileContent Helper

Carbon.FileContent.path(string)

Returns the file content of a path. Fails silently.

Examples:

Carbon.FileContent.path('resource://Foo.Bar/Private/Assets/Logo.svg')
Carbon.FileContent.path('Foo.Bar/Private/Assets/Logo.svg')

• string (string) The path to the file

Return The content of the file

Carbon.FileContent.pathHash(string, length)

Returns the hash value from the file content of a path. Fails silently.

Examples:

Carbon.FileContent.pathHash('resource://Foo.Bar/Private/Assets/Logo.svg') == 1d62f5a5
Carbon.FileContent.pathHash('Foo.Bar/Private/Assets/Logo.svg', 20) == 1d62f5a55ad5e304d60d

• string (string) The path to the file
• length (integer, optional) The length of the hash value defaults to 8. The maximal value is 40

Return The hash value from the content of the file

Carbon.FileContent.resource(resource)

Returns the file content of a persisted resource. Fails silently.

Example:

Carbon.FileContent.resource(q(node).property('file'))

• resource (resource) The persisted resource to read

Return The content of the file

Carbon.FileContent.resourceHash(resource, length)

Returns the hash value from the file content of a persisted resource. Fails silently.

Example:

Expression	Result
Carbon.FileContent.resourceHash(q(node).property('file'))	'1d62f5a5'
Carbon.FileContent.resourceHash(q(node).property('file'), 20)	'1d62f5a55ad5e304d60d'

• resource (resource) The persisted resource to read
• length (integer, optional) The length of the hash value defaults to 8. The maximal value is 40

Return The hash value from the content of the file

Tailwind Helper

Tailwind.merge(mixed1, mixed2, mixedN)

This helper allows you to merge multiple Tailwind CSS classes and automatically resolves conflicts between them without headaches. Render all arguments as classNames and apply conditions if needed. Merge strings and arrays to a string with unique values, separated by an empty space.

All arguments of the eel helper are evaluated and the following rules are applied:

• falsy values: (null, '', [], {}) are not rendererd
• array: all items that are scalar and truthy are rendered as classname
• object: keys that have a truthy values are rendered as classname
• scalar: is cast to string and rendered as class-name

It is based on tailwind-merge-php.

Examples:

Expression	Result
Tailwind.merge('w-8 h-8 rounded-full rounded-lg')	'w-8 h-8 rounded-lg'
Tailwind.merge(['w-8 rounded-full'], 'rounded-lg', 'h-8')	'w-8 rounded-lg h-8'
Tailwind.merge(null, null, {}, [])	null
Tailwind.merge('one', ['one', 'two'], {three: true, four: false}	'one two three'

Return The merged string

Configuration

If you are using Tailwind CSS without any extra config, you can use the Eel helper right away. And stop reading here.

If you're using a custom Tailwind config, you may need to configure the Eel helper as well to merge classes properly.

By default it is configured in a way that you can still use it if all the following apply to your Tailwind config:

• Only using color names which don't clash with other Tailwind class names
• Only deviating by number values from number-based Tailwind classes
• Only using font-family classes which don't clash with default font-weight classes
• Sticking to default Tailwind config for everything else

If some of these points don't apply to you, you need to customize the configuration.

This is an example to add a custom font size of very-large:

Carbon:
  Eel:
    tailwindMergeConfig:
      classGroups:
        "font-size":
          - text: ["very-large"]

You can also enable different validators, to make everything easier. For instance, if you use the Tailwind OKLCH Plugin, you can set it like that:

Carbon:
  Eel:
    tailwindMergeConfig:
      classGroups:
        "fill-lightness":
          - "fill-lightness-offset":
              ["INTEGER_VALIDATOR", "ARBITRARY_NUMBER_VALIDATOR"]
        "border-lightness":
          - "border-lightness-offset":
              ["INTEGER_VALIDATOR", "ARBITRARY_NUMBER_VALIDATOR"]
        "text-lightness":
          - "text-lightness-offset":
              ["INTEGER_VALIDATOR", "ARBITRARY_NUMBER_VALIDATOR"]
        "bg-lightness":
          - "bg-lightness-offset":
              ["INTEGER_VALIDATOR", "ARBITRARY_NUMBER_VALIDATOR"]

If you want to use a certain validator, just change it to constant case and add it as a string. So, for examle, if you want to use the TshirtSizeValidator, just add TSHIRT_SIZE_VALIDATOR to the list.

The merge service uses a its own cache Carbon_Eel_Tailwind. Make sure to clear the cache when you are making changes to the configuration.

AlpineJS Helper

AlpineJS.object(arg1, arg2, ..argN)

Generate an object for AlpineJS directive x-data. Supports nested arrays. You could do the same with Json.stringify(), but this function is shorter, as AlpineJS accepts objects and easier to write and read. The default magics from Alpine.js will not be converted to string. The same goes with methods (see example below).

Examples:

Expression	Result
AlpineJS.object({effect: 'slide', spaceBetween: 12, loop: true, navigation: null})	"{effect:'slide',spaceBetween:12,loop:true,navigation:null}"
AlpineJS.object({nested: {value: true, nulled: null'}})	"{nested:{value:true,nulled:null}}"
AlpineJS.object({persistedNumber: '$persist(5)'})	"{persistedNumber:$persist(5)}"
AlpineJS.object({value: 'someValue', log(value): '{console.log(value)}'})	"{value:'someValue',log(value){console.log(value)}}"

Of course you can also pass DataStructures to the helper:

prototype(Foo.Bar:Example) < prototype(Neos.Fusion:Component) {
  data = Neos.Fusion:DataStructure {
    effect = 'slide'
    spaceBetween = 12
    persistedNumber = '$persist(5)'
    'log(value)' = '{console.log(value)}'
  }

  renderer = ${AlpineJS.object(props.data)}
}

• ...arguments The array

Return The JavaScript object as string

AlpineJS.function(name, arg1, arg2, ..argN)

Generate a function call for AlpineJS. More info. Supports nested arrays. In named arrays ({first:1,second:null}) null get filtered out, but in list arrays ([1,null]) and in plain values the will stay. Basically it is the same as AlpineJS.object, just wrapped in a function call.

Examples:

Expression	Result
AlpineJS.function('slider', {effect: 'slide', spaceBetween: 12, loop: true, navigation: null})	"slider({effect:'slide',spaceBetween:12,loop:true})"
AlpineJS.function('slider', 'one', 1, false, null, ['string', 2, null])	"slider('one',1,false,null,['string',2,null])"
AlpineJS.function("vote", 4)	"vote(4)"

• name (string) The name for the function (e.g x-data, x-on:click, etc.)
• ...arguments (mixed) The options for the function

Return The string for the x-data function call

AlpineJS.magic(name, arg1, arg2, ..argN)

Generate a call for a magic function for AlpineJS.. Supports nested arrays. In named arrays ({first:1,second:null}) null get filtered out, but in list arrays ([1,null]) and in plain values the will stay.

Examples:

Expression	Result
AlpineJS.magic('dispatch', 'notify')	"$dispatch('notify')"
AlpineJS.magic('$dispatch', 'notify', { message: 'Hello World!' })	"$dispatch('notify',{message:'Hello World!'})"
AlpineJS.magic('dispatch', 'notify', { message: true, nested: {value: true} })	"$dispatch('notify',{message:true,nested:{value:true}})"

• name (string) The name for the magic. If not prefixed with an $, it will automatically prefixed.
• ...arguments (mixed) The options for the function

Return The string for the magic function call

AlpineJS.expression(value)

Use this to pass a javascript expression inside of the AlpineJS.object, AlpineJS.function or AlpineJS.magic helper

Examples:

Expression	Result
AlpineJS.object({theme: AlpineJS.expression("localStorage.theme||'system'"), show: true})	"{theme:localStorage.theme||'system',show:true}"
AlpineJS.function('themeSwitcher', {theme: AlpineJS.expression("localStorage.theme||'system'")	"themeSwitcher({theme:localStorage.theme||'system',show:true})"

String Helper

Carbon.String.BEM(block, element, modifiers)

Generates a string with BEM classes. The modifiers property can be a string (for one modifier), an array (e.g. ['one', 'two']), or an array with keys and values. If you have an array with keys and values (like a Fusion DataStructure) and the value is true, the key's name gets used for the modifier.

• block (string, required) The name of the block
• element (string) The name of the element, optional
• modifiers (string|array) The name of the modifiers, optional

Return The string

Carbon.String.getPropertyFromNodeLink(node, value, propertyName, fallback)

Get a property from a node link. Can be used to get the title from a page who is linked via the link editor.

Example:

Expression	Result
Carbon.String.getPropertyFromNodeLink(site, 'node://aaaa-bbbb-ccc')	'Title from the linked page'
Carbon.String.getPropertyFromNodeLink(site, 'node://aaaa-bbbb-ccc', null)	null
Carbon.String.getPropertyFromNodeLink(null, 'node://aaaa-bbbb-ccc')	null
Carbon.String.getPropertyFromNodeLink(site, 'some other value')	null
Carbon.String.getPropertyFromNodeLink(site, 'some other value', 'title', 'fallback value')	'fallback value'

• node (NodeInterface) The node, usally site
• value (string) The value to process
• propertyName (string) The name of the property to get
• fallback (mixed) The fallback value if nothing is found

Carbon.String.urlize(string)

Generates a slug of the given string

Examples:

Expression	Result
Carbon.String.urlize('Hello World')	'hello-world'
Carbon.String.urlize('Ä_ÖÜ äöü')	'ae-oeue-aeoeue'

• string (string) The string to convert

Return The converted string

Carbon.String.minifyJS(javascript)

Minifies JavaScript so that it can be delivered to the client quicker.

• javascript (string, required) The JavaScript to minify

Return The minified JavaScript

Carbon.String.minifyCSS(javascript)

Minifies CSS so that it can be delivered to the client quicker.

• css (string, required) The CSS to minify

Return The minified CSS

Carbon.String.toPascalCase(string)

Convert strings to PascalCase.

Examples:

Expression	Result
Carbon.String.toPascalCase('hello-world')	'HelloWorld'
Carbon.String.toPascalCase('hello world')	'HelloWorld'
Carbon.String.toPascalCase('Hello World')	'HelloWorld'

• string (string) The string to convert

Return The converted string

Carbon.String.toCamelCase(string)

Convert strings to camelCase.

Examples:

Expression	Result
Carbon.String.toCamelCase('hello-world')	'helloWorld'
Carbon.String.toCamelCase('hello world')	'helloWorld'
Carbon.String.toCamelCase('Hello World')	'helloWorld'

• string (string) The string to convert

Return The converted string

Carbon.String.convertCamelCase(string, separator)

Convert CamelCaseStrings to hyphen-case-strings

Examples:

Expression	Result
Carbon.String.convertCamelCase('HelloWorld')	'hello-world'
Carbon.String.convertCamelCase('HelloWorld', '_')	'hello_world'
Carbon.String.convertCamelCase('HelloWorld', '')	'helloworld'

• string (string) The string to convert
• separator (string, optional) The separator between the words defaults to -

Return The converted string

Carbon.String.titleCaseWords(input)

Make every word title case. Splits by uppercase letters, ., - and _

For example, Carbon.String.titleCaseWords(' createWebsite_user for-neos ') results in 'Create Website User For Neos'

• input (string) A string to convert

Return The converted string

Carbon.String.convertToString(input, separator)

Helper to make sure to get a string back.

Examples:

Expression	Result
Carbon.String.convertToString(' helloworld ')	'helloworld'
Carbon.String.convertToString([' hello', ' world'])	'hello world'
Carbon.String.convertToString([' hello', ' world'], '-')	'hello-world'

• input (string, array) A string or an array to convert
• separator (string, optional) The separator between the words, defaults to whitespace

Return The converted string

Carbon.String.nl2br(string, separator)

Replace all newlines with an <br>.

Examples:

Expression	Result
Carbon.String.nl2br('hello\nworld')	'hello<br>world'
Carbon.String.nl2br('hello\nworld', ' - ')	'hello - world'

• string (string) A string to convert
• separator (string, optional) The separator between the words, defaults to <br>

Return The converted string

Carbon.String.removeNbsp(string)

Replace non-breaking spaces and double spaces with a normal space.

Examples:

Expression	Result
Carbon.String.removeNbsp(' hello world')	'hello world'
Carbon.String.removeNbsp('hello world')	'hello world'

• string (string) A string to convert

Return The converted string

Carbon.String.classNames(mixed1, mixed2, mixedN)

Render all arguments as classNames and apply conditions if needed. Merge strings and arrays to a string with unique values, separated by an empty space.

All arguments of the eel helper are evaluated and the following rules are applied:

• falsy values: (null, '', [], {}) are not rendererd
• array: all items that are scalar and truthy are rendered as classname
• object: keys that have a truthy values are rendered as classname
• scalar: is cast to string and rendered as class-name

Examples:

Expression	Result
Carbon.String.classNames('', 'one')	'one'
Carbon.String.classNames(['one two three'], ['one', 'four'])	'one two three four'
Carbon.String.classNames(null, false, [null], {one: false})	null
Carbon.String.classNames('one two three', ['one', 'four'])	'one two three four'
Carbon.String.classNames('one', {two: true, three: false })	'one two'

Return The merged string

Carbon.String.splitIntegerAndString(string)

Split a string into an array width integers and strings. Useful for animations.

Examples:

Expression	Result
Carbon.String.splitIntegerAndString('1000+ customers')	[1000, '+ customers']
Carbon.String.splitIntegerAndString('24/7 reachability')	[24, '/', 7, ' reachability']
Carbon.String.splitIntegerAndString('0 issues')	[0, ' issues']
Carbon.String.splitIntegerAndString('')	[]
Carbon.String.splitIntegerAndString(null)	[]
Carbon.String.splitIntegerAndString(100)	[100]

• string (string) The string to split

Return The string, splitted into an array of integers and strings

Carbon.String.phone(phoneNumber, defaultCountryCode, prefix)

Helper to convert phone numbers to a compatible format for links

Examples:

Expression	Result
Carbon.String.phone(' 079 123 45 67 ')	'tel:[phone]'
Carbon.String.phone('[phone]/45/67')	'tel:[phone]'
Carbon.String.phone('079 123 45 67', '+41')	'tel:[phone]'
Carbon.String.phone('079 123 45 67', null, null)	'0791234567'
Carbon.String.phone(' / (0) ')	null

• phoneNumber (string) The phone number to convert
• defaultCountryCode (string, optional) The default country code, for example '+41'
• prefix (string, optional) Prefix the phone number, defaults to 'tel:'

Return The phone number, optimized for links

Carbon.String.isValidEmail(emailAddress)

Checks if the string is a valid email address

Examples:

Expression	Result
Carbon.String.isValidEmail('')	false
Carbon.String.isValidEmail('Some text')	false
Carbon.String.isValidEmail('[e-mail]')	true

• emailAddress (string) The string to check

Carbon.String.replaceOnce(string, search, replace)

Helper to replace the first occurrence of a string.

Examples:

Expression	Result
Carbon.String.replaceOnce('Foo Bar Foo', 'Foo', 'X')	'X Bar Foo'
Carbon.String.replaceOnce('Foo Bar Foo', 'Foo ')	'Bar Foo'

• string (string) The string being searched and replaced on
• search (string) The value being searched for
• prefix (string, optional) The replacement value that replaces found search value

Returns the string with one occurrence replaced

Carbon.String.generateHmac(string)

Generate a hash (HMAC) for a given string

• string (string, required) The string for which a hash should be generated

Return The hash of the string

Carbon.String.validateHmac(string, hmac)

Tests if a string $string matches the HMAC given by $hash.

• string (string, required) The string which should be validated
• hmac (string, required) The hash of the string

Return true if string and hash fit together, false otherwise.

Carbon.String.heading(tagName, modifier)

Generate a heading tag name name based on the given tag name and modifier.

The possible input & output tags are: h1, h2, h3, h4, h5, h6 and p. If the input tag is not one of theese, the same tag gets returned.

Examples:

Expression	Result
Carbon.String.heading('h1')	'h2'
Carbon.String.heading('p', -5)	'h2'
Carbon.String.heading('h1', 2)	'h3'
Carbon.String.heading('h2', -1)	'h1'
Carbon.String.heading('h2', -2)	'h1'
Carbon.String.heading('h1', 5)	'h6'
Carbon.String.heading('h1', 6)	'p'
Carbon.String.heading('ul')	'ul'

Number Helper

Carbon.Number.format(number, decimals, dec_point, thousands_sep)

Format a number with grouped thousands. If decimals is set to null, it returns as many as needed decimals.

• number (float, required) The number being formatted
• decimals (integer, optional) Sets the number of decimal points, defaults to null
• dec_point (string, optional) The name of the modifier defaults to .
• thousands_sep (string, optional) The name of the modifier defaults to ,

Carbon.Number.formatLocale(number, decimals, locale)

Format a localized number with grouped thousands. If decimals is set to null, it returns as many as needed decimals.

• number (float, required) The number being formatted
• decimals (integer, optional) Sets the number of decimal points, defaults to null
• locale (string, optional) String locale - example (de_DE|en|ru_RU)

Carbon.Number.decimalDigits(number)

Get number of decimal digits.

• number (float, required) The number being formatted

Carbon.Number.pxToRem(value, fallback)

Convert a pixel value to rem

• value (numeric | string, required) The value to converted
• fallback (numeric | string, optional) Fallback value if value is false or null

Examples:

Expression	Result
Carbon.Number.pxToRem('')	'0'
Carbon.Number.pxToRem('8px')	'0.5rem'
Carbon.Number.pxToRem(16)	'1rem'
Carbon.Number.pxToRem(0)	'0'
Carbon.Number.pxToRem(false, 32)	'2rem'
Carbon.Number.pxToRem(null, '16px')	'1rem'

Returns a string with the converted value

Backend Helper

Carbon.Backend.language()

Returns the language from the interface

Carbon.Backend.translate(id, originalLabel, arguments, source, package, quantity, locale)

Get the translated value (in the language of the interface) for an id or original label. If the only id is set and contains a translation shorthand string, translate according to that shorthand.

In all other cases: Replace all placeholders with corresponding values if they exist in the translated label.

• id (string) Id to use for finding translation (trans-unit id in XLIFF)
• originalLabel (string, optional) The original translation value (the untranslated source string)
• arguments (array, optional) Array of numerically indexed or named values to be inserted into placeholders
• source (string, optional) Name of file with translations
• package (string, optional) Target package key
• quantity (mixed, optional) A number to find a plural form for (float or int), null to not use plural forms
• locale (string, optional) An identifier of the locale to use (NULL for use the interface language)

Returns the translated label or source label / ID key

Version Helper

Carbon.Version.lowerThanNine()

Returns true if the Flow version is lower than 9.

Carbon.Version.compare(versionString, optionalOperator)

Compares the Flow version with the given versionString.

• versionString (string) PHP-standardized version number string
• optionalOperator (string, optional) An optional operator. The possible operators are: <, lt, <=, le, >, gt, >=, ge, ==, =, eq, !=, <>, ne respectively.

Returns by default -1 if the Flow version is lower than the versionString, 0 if they are equal, and 1 if the versionString is lower than Flow.

When using the optional operator argument, the function will return true if the relationship is the one specified by the operator, false otherwise.

Installation

Carbon.Eel is available via packagist. Just run

composer require carbon/eel

Credits

Some of the Eel helpers were inspired and or copied from punkt.de