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XAML Behaviors

XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License

Build Status

PlatformStatus
ManagedBuild Managed

Getting Started

Where to get it

Resources

More Info

Code Example

For an example of using Behaviors in an application, here is a snippet of XAML:

<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>

Using Behaviors SDK

The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.

Building Behaviors from Source

What You Need

Clone the Repository

Build and Create Managed XAML Behaviors NuGet

  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio
    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):
    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release

For UWP:

  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version

For WinUI:

  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version

About

This is the official home for WinUI/UWP XAML Behaviors on GitHub.

Resources

Readme
MIT license

Code of conduct

Code of conduct

Security policy

Security policy
Activity
Custom properties

Stars

788 stars

Watchers

85 watching

Forks

122 forks
Report repository

Releases

Packages

Used by

Contributors

Languages

, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} 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
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} 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
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
Repository files navigation
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} 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
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} 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
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

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

Skip to content
BranchesTags
Repository files navigation
XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
Resources
Readme
MIT license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
788 stars
Watchers
85 watching
Forks
122 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Universal Dark Mode - works on any site
(function() {
var enabled = true;
function applyDarkMode() {
if (!enabled) return;
// Create style element if it doesn't exist
var style = document.getElementById('universal-dark-mode-style');
if (!style) {
style = document.createElement('style');
style.id = 'universal-dark-mode-style';
document.head.appendChild(style);
}
// Dark mode CSS - inverts colors but preserves images/video
style.textContent = '
/* Invert everything except media */
html {
filter: invert(1) hue-rotate(180deg) !important;
background: #1a1a2e !important;
}
/* Restore images, videos, iframes, canvas */
img, video, iframe, canvas, svg, picture, [style*="background-image"] {
filter: invert(1) hue-rotate(180deg) !important;
}
/* Preserve specific elements that should not be inverted */
.no-dark-mode, .no-dark-mode *,
[data-theme="light"], [data-theme="light"],
.ace_editor, .ace_editor *,
.CodeMirror, .CodeMirror *,
.monaco-editor, .monaco-editor *,
.markdown-body pre, .markdown-body pre *,
.highlight, .highlight *,
pre code, pre code * {
filter: none !important;
}
/* Fix common UI elements */
.modal, .popup, .dropdown-menu, .tooltip, .popover {
filter: invert(1) hue-rotate(180deg) !important;
background: #2d2d44 !important;
border-color: #444 !important;
}
/* Scrollbars */
::-webkit-scrollbar { background: #1a1a2e !important; }
::-webkit-scrollbar-thumb { background: #444 !important; }
::-webkit-scrollbar-thumb:hover { background: #555 !important; }
/* Selection */
::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }
';
}
function removeDarkMode() {
var style = document.getElementById('universal-dark-mode-style');
if (style) style.remove();
}
// Toggle with Alt+Shift+D
document.addEventListener('keydown', function(e) {
if (e.altKey && e.shiftKey && e.key === 'D') {
e.preventDefault();
enabled = !enabled;
if (enabled) {
applyDarkMode();
console.log('[Universal Dark Mode] Enabled');
} else {
removeDarkMode();
console.log('[Universal Dark Mode] Disabled');
}
}
});
// Apply on load
applyDarkMode();
// Re-apply on dynamic content
var observer = new MutationObserver(function(mutations) {
if (enabled && !document.getElementById('universal-dark-mode-style')) {
applyDarkMode();
}
});
observer.observe(document.head, { childList: true });
console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');
})();
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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XAML Behaviors
XAML Behaviors is an easy-to-use means of adding common and reusable interactivity to your Windows UWP applications with minimal code. It is available for managed applications only. Use of XAML Behaviors is governed by the MIT License
Build Status
PlatformStatus
ManagedBuild Managed
Getting Started
Where to get it
Resources
More Info
Code Example
For an example of using Behaviors in an application, here is a snippet of XAML:
<Buttonxmlns:Interactivity="using:Microsoft.Xaml.Interactivity">
<Interactivity:Interaction.Behaviors>
<Interactivity:EventTriggerBehaviorEventName="Click">
<Interactivity:ChangePropertyActionPropertyName="Background">
<Interactivity:ChangePropertyAction.Value>
<SolidColorBrushColor="Red"/>
</Interactivity:ChangePropertyAction.Value>
</Interactivity:ChangePropertyAction>
</Interactivity:EventTriggerBehavior>
</Interactivity:Interaction.Behaviors>
</Button>
Using Behaviors SDK
The documentation explains how to install Visual Studio, add the XAML Behaviors NuGet package to your project, and get started using the API.
Building Behaviors from Source
What You Need
Clone the Repository
Build and Create Managed XAML Behaviors NuGet
  • Ensure that nuget.exe is available in PATH
  • If you're using Visual Studio

    • Open the "BehaviorsSDKManaged.sln" solution in Visual Studio
    • Change Build Configuration to Release
    • Build solution with right click > Build, or by clicking F6
  • If you're building from CLI (Visual Studio Developer Command prompt):

    • Run nuget restore src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln
    • Run msbuild -t:build src\BehaviorsSDKManaged\BehaviorsSDKManaged.sln /p:Configuration=Release
For UWP:
  • Run msbuild /t:pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.Uwp\Microsoft.Xaml.Interactivity.Uwp.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
For WinUI:
  • Run msbuild /t:Pack src\BehaviorsSDKManaged\Microsoft.Xaml.Interactivity.WinUI\Microsoft.Xaml.Interactivity.WinUI.csproj /p:Configuration=Release
    • (Optional) Add /p:TimestampPackage=true to include the timestamp in the NuGet package version
About
This is the official home for WinUI/UWP XAML Behaviors on GitHub.
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