@nitrogenbuilder/client-preact

@nitrogenbuilder/client-preact

This package provides the core Nitrogen client-side functionality to be used in all preact projects.

Installation

npm install @nitrogenbuilder/client-preact

Dynamic Data Templates

Use {{ }} syntax in string props to render dynamic data.

Path Resolution

Access nested values with dot notation:

{{ post.title }}
{{ post.author.name }}
{{ post.meta.og_image }}

Fallbacks with ||

Chain multiple values — the first non-empty result is used:

{{ post.subtitle || post.title }}
{{ post.custom_excerpt || post.excerpt || 'No excerpt available' }}
{{ author.display_name || author.username || 'Anonymous' }}

String Literals

Wrap literal strings in single quotes:

{{ 'Hello World' }}
{{ post.title || 'Untitled' }}

Filters

Apply transformations with :filter after a path. Filters chain left to right.

Filter	Args	Description	Example
uppercase	—	Converts to UPPERCASE	{{ post.title:uppercase }}
lowercase	—	Converts to lowercase	{{ post.title:lowercase }}
capitalize	—	Capitalizes first character	{{ post.status:capitalize }}
trim	—	Removes leading/trailing whitespace	{{ post.title:trim }}
substring	(start) or (start, end)	Extracts a portion of the string	{{ post.title:substring(0,17) }}
truncate	(length)	Truncates and appends ... if over length	{{ post.excerpt:truncate(55) }}
striphtml	—	Removes all HTML tags	{{ post.content:striphtml }}

Chaining Filters

Apply multiple filters in sequence:

{{ post.content:striphtml:truncate(100) }}
{{ post.title:trim:uppercase }}
{{ post.body:striphtml:trim:truncate(50) }}

String Concatenation with +

Join values and literals together:

{{ post.title:substring(0,17)+'...' }}
{{ post.first_name+' '+post.last_name }}
{{ 'By '+post.author.name }}

Combining Everything

Filters, concatenation, and fallbacks work together:

{{ post.title:substring(0,17)+'...' || 'Untitled' }}
{{ post.content:striphtml:truncate(100) || post.excerpt:striphtml || 'No content' }}
{{ post.author.name:uppercase || 'ANONYMOUS' }}

Custom Filters

Register custom filters from your project:

import { registerFilter } from '@nitrogenbuilder/client-core';

registerFilter('blogdate', (value) => {
  return new Date(value).toLocaleDateString('en-US', {
    month: 'short', day: 'numeric', year: 'numeric',
  });
});

// Usage: {{ post.date:blogdate }}

Dynamic Value Props (___dynamic)

For structured dynamic bindings (set via the builder UI), props ending in ___dynamic resolve a DynamicValue object:

interface DynamicValue {
  key: string;       // dot-notation path into dynamic data
  before?: string;   // prepended to the resolved value
  fallback?: string | boolean; // used if key resolves to empty
  after?: string;    // appended to the resolved value
}

These are processed separately from {{ }} templates and do not support filters.