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Javascript State Machine

NPM versionBuild Status

A library for finite state machines.

matter state machine


NOTE for existing users

VERSION 3.0 Is a significant rewrite from earlier versions. Existing 2.x users should be sure to read the Upgrade Guide.


Installation

In a browser:

<scriptsrc='state-machine.js'></script>

after downloading the source or the minified version

Using npm:

 npm install --save-dev javascript-state-machine

In Node.js:

varStateMachine=require('javascript-state-machine');

Usage

A state machine can be constructed using:

varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});

... which creates an object with a current state property:

  • fsm.state

... methods to transition to a different state:

  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()

... observer methods called automatically during the lifecycle of a transition:

  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()

... along with the following helper methods:

  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states

Terminology

A state machine consists of a set of States

  • solid
  • liquid
  • gas

A state machine changes state by using Transitions

  • melt
  • freeze
  • vaporize
  • condense

A state machine can perform actions during a transition by observing Lifecycle Events

  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...

A state machine can also have arbitrary Data and Methods.

Multiple instances of a state machine can be created using a State Machine Factory.

Documentation

Read more about

Contributing

You can Contribute to this project with issues or pull requests.

Release Notes

See RELEASE NOTES file.

License

See MIT LICENSE file.

Contact

If you have any ideas, feedback, requests or bug reports, you can reach me at jake@codeincomplete.com, or via my website: Code inComplete

About

A javascript finite state machine library

Resources

Readme
MIT license

Contributing

Contributing
Activity

Stars

0 stars

Watchers

0 watching

Forks

1 fork
Report repository

Releases

Packages

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Repository files navigation
Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
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Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
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0 stars
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0 watching
Forks
1 fork
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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Javascript State Machine
NPM versionBuild Status
A library for finite state machines.
matter state machine

NOTE for existing users
VERSION 3.0 Is a significant rewrite from earlier versions.
Existing 2.x users should be sure to read the Upgrade Guide.

Installation
In a browser:
<scriptsrc='state-machine.js'></script>
after downloading the source or the minified version
Using npm:
 npm install --save-dev javascript-state-machine
In Node.js:
varStateMachine=require('javascript-state-machine');
Usage
A state machine can be constructed using:
varfsm=newStateMachine({init: 'solid',transitions: [{name: 'melt',from: 'solid',to: 'liquid'},{name: 'freeze',from: 'liquid',to: 'solid'},{name: 'vaporize',from: 'liquid',to: 'gas'},{name: 'condense',from: 'gas',to: 'liquid'}],methods: {onMelt: function(){console.log('I melted')},onFreeze: function(){console.log('I froze')},onVaporize: function(){console.log('I vaporized')},onCondense: function(){console.log('I condensed')}}});
... which creates an object with a current state property:
  • fsm.state
... methods to transition to a different state:
  • fsm.melt()
  • fsm.freeze()
  • fsm.vaporize()
  • fsm.condense()
... observer methods called automatically during the lifecycle of a transition:
  • onMelt()
  • onFreeze()
  • onVaporize()
  • onCondense()
... along with the following helper methods:
  • fsm.is(s) - return true if state s is the current state
  • fsm.can(t) - return true if transition t can occur from the current state
  • fsm.cannot(t) - return true if transition t cannot occur from the current state
  • fsm.transitions() - return list of transitions that are allowed from the current state
  • fsm.allTransitions() - return list of all possible transitions
  • fsm.allStates() - return list of all possible states
Terminology
A state machine consists of a set of States
  • solid
  • liquid
  • gas
A state machine changes state by using Transitions
  • melt
  • freeze
  • vaporize
  • condense
A state machine can perform actions during a transition by observing Lifecycle Events
  • onBeforeMelt
  • onAfterMelt
  • onLeaveSolid
  • onEnterLiquid
  • ...
A state machine can also have arbitrary Data and Methods.
Multiple instances of a state machine can be created using a State Machine Factory.
Documentation
Read more about
Contributing
You can Contribute to this project with issues or pull requests.
Release Notes
See RELEASE NOTES file.
License
See MIT LICENSE file.
Contact
If you have any ideas, feedback, requests or bug reports, you can reach me at
jake@codeincomplete.com, or via
my website: Code inComplete
About
A javascript finite state machine library
Resources
Readme
MIT license
Contributing
Contributing
Activity
Stars
0 stars
Watchers
0 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages