A powerful and flexible hook system for Node.js, inspired by the WordPress actions and filters API. This package provides a simple yet effective way to create extensible and decoupled architectures in your JavaScript applications.
[ It is designed to be cross-platform, supporting modern ES2015+ environments as well as vanilla JavaScript setups. ]
Full WordPress Hook API compatibility: Implements the vast majority of WP hook functions.
Actions (
do_action): Create points in your code where other functions can be executed.Filters (
apply_filters): Create points in your code where data can be modified.Priority-based execution: Control the order in which callbacks are executed.
Hook Inspection: Check if hooks exist, how many times they've run, and what's currently running.
Easy to use: A simple and intuitive API.
Zero dependencies: Lightweight and self-contained.
You can install package via-
This is the standard way to install any Node.js package-
npm install node-hookerOr-
Yes — Yarn can install npm packages because it uses the same npm registry under the hood (equivalent to npm install node-hooker)-
yarn add node-hookerAfter installation, you can run tests from the terminal using-
npm testconsthooker=require('node-hooker');// --- ACTIONS ---// 1. Register a function for an action hookfunctionmyActionCallback(arg1,arg2){console.log(`Action running! Args: ${arg1}, ${arg2}`);console.log(`Currently doing action: ${hooker.current_action()}`);}hooker.add_action('app_init',myActionCallback,10,2);// 2. Trigger the action hookconsole.log('Doing action...');hooker.do_action('app_init','user_id_123',{setting: 'on'});console.log(`'app_init' has run ${hooker.did_action('app_init')} time(s).`);// --- FILTERS ---// 1. Register a function for a filter hookfunctionmyFilterCallback(text){returntext.toUpperCase();}hooker.add_filter('format_title',myFilterCallback);// 2. Trigger the filter hook and use the modified valuelettitle='Hello World';title=hooker.apply_filters('format_title',title);console.log(title);// Output: HELLO WORLDOR
This library can be used directly in the browser. A UMD (Universal Module Definition) bundle is provided in the dist folder, which is also available via CDN.
You can add node-hooker to your project by including the following script tag. It's recommended to use the minified version for production.
<!-- Regular --><scriptsrc="https://cdn.jsdelivr.net/npm/node-hooker/dist/node-hooker.umd.min.js"></script><!-- Minified --><scriptsrc="https://cdn.jsdelivr.net/npm/node-hooker/dist/node-hooker.umd.js"></script>Once included, the library will be available under the global variable Hooker.
<!DOCTYPE html><html><head><title>node-hooker Browser Example</title></head><body><h1>Check the console for output!</h1><scriptsrc="https://cdn.jsdelivr.net/npm/node-hooker/dist/node-hooker.umd.min.js"></script><script>// The library is now available on the window.Hooker objectconsole.log(Hooker);// Add an actionHooker.add_action('app_loaded',function(){console.log('The application has loaded!');});// Trigger the actionHooker.do_action('app_loaded');// Console Output: The application has loaded!// Use a filterconstoriginalText="hello browser";constfilteredText=Hooker.apply_filters('format_text',originalText,(text)=>text.toUpperCase());console.log(filteredText);// Note: Filters require a callback to be added first to have an effect.// Let's add one now.Hooker.add_filter('format_text',(text)=>text.toUpperCase());consttrulyFilteredText=Hooker.apply_filters('format_text',originalText);console.log(trulyFilteredText);// Console Output: HELLO BROWSER</script></body></html>node test.phpOR
| Function | Purpose |
|---|---|
add_action(hook, callback, priority, args) | Attach a function to an action hook. |
add_filter(hook, callback, priority, args) | Attach a function to a filter hook. |
| Function | Purpose |
|---|---|
do_action(hook, ...args) | Trigger an action hook (run all attached callbacks). |
do_action_ref_array(hook, args_array) | Same as do_action(), but pass arguments as an array. |
apply_filters(hook, value, ...args) | Trigger a filter hook, passing $value through each callback. |
apply_filters_ref_array(hook, args_array) | Same as apply_filters(), but arguments are passed as an array. |
| Function | Purpose |
|---|---|
remove_action(hook, callback, priority) | Remove a previously added action callback. |
remove_filter(hook, callback, priority) | Remove a previously added filter callback. |
remove_all_actions(hook, priority) | Remove all callbacks for a specific action hook (or priority). |
remove_all_filters(hook, priority) | Remove all callbacks for a specific filter hook (or priority). |
| Function | Purpose |
|---|---|
has_action(hook, callback = false) | Check if a function is hooked to an action (or if any callbacks exist). |
has_filter(hook, callback = false) | Check if a function is hooked to a filter (or if any callbacks exist). |
did_action(hook) | Returns how many times an action has run. |
current_action() | Get the name of the currently running action hook. |
current_filter() | Get the name of the currently running filter hook. |
doing_action(hook = null) | Check if a specific action (or any action) is currently running. |
doing_filter(hook = null) | Check if a specific filter (or any filter) is currently running. |
While the singleton is convenient, you can create isolated instances of the Hooker class for separate event buses.
constmyInstance=newHooker();myInstance.add_action('my_hook',()=>console.log('Hello from my instance!'));myInstance.do_action('my_hook');Files structures/ tree
node-hooker/
├── lib/
│ └── Hooker.js
│ └── Hook.js
├── dist/
│ └── node-hooker.umd.js
│ └── node-hooker.umd.min.js
├── test.js
├── browser-test.html
├── package.json
├── README.md
└── CHANGELOG.mdThis extensible codes is licensed under the MIT License. Copyright (c) 2025 by Mamedul Islam.
See the LICENSE file for more details.
This extensible codes was created and is maintained by Mamedul Islam.
As a passionate web developer with experience in creating interactive and user-friendly web components. Currently available for freelance projects or full-time opportunities.
Helping businesses grow their online presence with custom web solutions. Specializing in WordPress, WooCommerce, and Shopify. Building modern, responsive, and high-performance scalable websites with custom made plugins, codes, customizations.
- WhatsApp: message me
- Portfolio: mamedul.github.io
- GitHub: @mamedul
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- Twitter (X): @mamedul
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