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Catalyst

Aiming to integrate POS systems into one universal system: the Catalyst.

Questions

  1. What is Catalyst supposed to be?

Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.

  1. How is this any different from existing POS systems?

Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:

a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.

b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.

More Added Later

About

Aiming to integrate POS systems into one universal system: the Catalyst.

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Readme
MIT license
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, '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" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
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, '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('^' + ".*" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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Contributors

, '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('^' + ".*" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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Packages
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, '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" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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('^' + ".*" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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('^' + ".*" + '

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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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Catalyst
Aiming to integrate POS systems into one universal system: the Catalyst.
Questions
  1. What is Catalyst supposed to be?
Catalyst is trying to become a universal POS system in which you can browse the list of participating vendors (that use POS systems) and use features not normally found in normal POS systems. Place your order with a single app to hundreds of fast food restaurants. Need groceries? Add everything to your virtual cart after picking them out in-store. Then, scan the QR code at the checkout and see your cart and your total right there. Picking out clothes at Macy's? Try 'em on, add what you like, then check out in the app. A supported scanner will need to see the QR code generated on your virtual reciept to validate your purchase.
  1. How is this any different from existing POS systems?
Well, to the consumer, this may seem like nothing different. However, to large retail companies, training employees to efficiently operate a POS system seems like unnecessary work. Catalyst simplifies this to the core functions:
a. Checkout, Return, Exchange, and Check Price - These are specifically geared towards retail stores.
b. Menu, Checkout, Exchange (wrong order), Promo Code - These are for fast-food outlets/restaurants. They can be customized to needs.
More Added Later
About
Aiming to integrate POS systems into one universal system: the Catalyst.
Resources
Readme
MIT license
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors