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Casbin.js

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Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.

Example

We demonstrate the usage of Casbin.js with a React app. View the code to see more details.

You can use manual mode in Casbin.js, and set the permission whenever you wish.

constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});

In manual mode you can also pass the model and policies produced by the backend's CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to setPermission. Casbin.js then builds a real enforcer from that data, so roles (g rules) are taken into account. Remember to set the user, since the request is evaluated as (user, object, action).

constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});

Users with several roles

A user may hold any number of roles at the same time, and a role may inherit from another role. Casbin.js evaluates the g rules with the same RBAC engine as the backend, so the user gets the permissions of every one of those roles. This needs the model and policies described above: the plain {action: [objects]} map holds no roles at all, only the flattened result.

// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();

For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"), authorizer.getRoles("domain1").

You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)

constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();

More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!

TODO MAP

  • Permission cache.
  • Cookie mode.
  • Lightweight enforcer (avoid the abuse of async functions).
  • Integration with other modern frontend frameworks.

About

An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript

casbin.org/docs/frontend

Topics

abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn

Resources

Readme
Apache-2.0 license

Code of conduct

Code of conduct

Security policy

Security policy
Activity
Custom properties

Stars

208 stars

Watchers

6 watching

Forks

40 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
Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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; }
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';
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
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Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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
Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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
Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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
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Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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
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Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
Casbin.js
GitHub ActionsReleaseNPM versionNPM downloadinstall sizeDiscord
Casbin.js is the frontend library for Casbin, which facilitates the manipulation, management and storage of the user permission in a frontend application.
Example
We demonstrate the usage of Casbin.js with a React app. View the code to see more details.
You can use manual mode in Casbin.js, and set the permission whenever you wish.
constcasbinjs=require('casbin.js');// Set the user's permission:// He/She can read 2 objects: data1 and data2// Can write 1 objects: data1constpermission={"read": ['data1','data2'],"write": ['data1']}// Run casbin.js in manual mode, which requires you to set the permission manually.constauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(permission);authorizer.can("read","data1").then(result=>{console.log(result)})authorizer.cannot("write","data2").then(result=>{console.log(result)});
In manual mode you can also pass the model and policies produced by the backend's
CasbinJsGetPermissionForUser (a JSON object with the keys m, p and g) to
setPermission. Casbin.js then builds a real enforcer from that data, so roles (g
rules) are taken into account. Remember to set the user, since the request is evaluated
as (user, object, action).
constauthorizer=newcasbinjs.Authorizer("manual");// The JSON string or object returned by CasbinJsGetPermissionForUserauthorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");authorizer.can("read","data1").then(result=>{console.log(result)});
Users with several roles
A user may hold any number of roles at the same time, and a role may inherit from
another role. Casbin.js evaluates the g rules with the same RBAC engine as the
backend, so the user gets the permissions of every one of those roles. This needs
the model and policies described above: the plain {action: [objects]} map holds no
roles at all, only the flattened result.
// g, alice, admin// g, alice, editor// g, admin, rootconstauthorizer=newcasbinjs.Authorizer("manual");authorizer.setPermission(responseFromApi);awaitauthorizer.setUser("alice");// Granted by "admin", by "editor", and by the "root" role that "admin" inherits.awaitauthorizer.can("read","data1");// ["admin", "editor", "root"]awaitauthorizer.getRoles();// [["admin", "data1", "read"], ["editor", "data2", "write"], ...]awaitauthorizer.getImplicitPermissions();
For a model with domains, pass the domain to each of them: authorizer.can("read", "data1", "domain1"),
authorizer.getRoles("domain1").
You can also use the auto mode. In details, specify a casbin backend service endpoint when initializing the Casbin.js authorizer, and set the subject when the frontend user identity changes. Casbin.js will automatically fetch the permission from the endpoint. (A pre-configurated casbin service API is required at the backend.)
constcasbinjs=require('casbin.js');// Set your backend casbin service urlconstauthorizer=newcasbinjs.Authorizer('auto',{endpoint: 'http://Domain_name/casbin/api'});// When the identity shifts, reset the user. Casbin.js will automatically fetch the permission from the endpoint.awaitauthorizer.setUser("Tom");// Evaluate the permissionauthorizer.can("read","data1").then();
More functionalities of Casbin.js are still under development. Feel free to raise issues to share your features suggestions!
TODO MAP
  •  Permission cache.
  •  Cookie mode.
  •  Lightweight enforcer (avoid the abuse of async functions).
  •  Integration with other modern frontend frameworks.
About
An authorization library that supports access control models like ACL, RBAC, ABAC in Frontend Javascript
casbin.org/docs/frontend
Topics
abacaclauthauthorizationauthzbrowsercasbincasbin-frontendfrontendjavascriptjsnodenodejsrbacyarn
Resources
Readme
Apache-2.0 license
Code of conduct
Code of conduct
Security policy
Security policy
Activity
Custom properties
Stars
208 stars
Watchers
6 watching
Forks
40 forks
Report repository
Releases
Packages
Used by
Contributors
Languages