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Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64

Open
#65
Open
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
#65

Description

@beautyfree
beautyfree
opened on Jun 3, 2026

Summary

There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:

  • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
  • iframe content portals.
  • Shadow DOM roots.
  • Pop-out windows opened with window.open.

Why this is almost already supported

The internals already thread a target through to goober:

// src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...

goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:

exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});

so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.

Reproduction

import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);

The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.

keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).

Proposed API

Mirror styled-components:

import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>

All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.

Sketch

A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:

constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);

Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).

Workaround today

We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.

Offer

Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.

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      , '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" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
      Skip to content
      Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
      Open
      #65
      Open
      Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
      #65
      Description
      @beautyfree
      beautyfree
      opened on Jun 3, 2026
      Summary
      There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
      • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
      • iframe content portals.
      • Shadow DOM roots.
      • Pop-out windows opened with window.open.
      Why this is almost already supported
      The internals already thread a target through to goober:
      // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
      goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
      exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
      so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
      Reproduction
      import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
      The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
      keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
      Proposed API
      Mirror styled-components:
      import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
      All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
      Sketch
      A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
      constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
      Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
      Workaround today
      We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
      Offer
      Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        No labels
        No labels
        Type
        No type
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, '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('^' + ".*" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
          Skip to content
          Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
          Open
          #65
          Open
          Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
          #65
          Description
          @beautyfree
          beautyfree
          opened on Jun 3, 2026
          Summary
          There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
          • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
          • iframe content portals.
          • Shadow DOM roots.
          • Pop-out windows opened with window.open.
          Why this is almost already supported
          The internals already thread a target through to goober:
          // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
          goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
          exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
          so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
          Reproduction
          import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
          The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
          keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
          Proposed API
          Mirror styled-components:
          import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
          All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
          Sketch
          A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
          constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
          Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
          Workaround today
          We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
          Offer
          Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            Type
            No type
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, '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('^' + ".*" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
              Skip to content
              Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
              Open
              #65
              Open
              Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
              #65
              Description
              @beautyfree
              beautyfree
              opened on Jun 3, 2026
              Summary
              There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
              • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
              • iframe content portals.
              • Shadow DOM roots.
              • Pop-out windows opened with window.open.
              Why this is almost already supported
              The internals already thread a target through to goober:
              // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
              goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
              exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
              so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
              Reproduction
              import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
              The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
              keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
              Proposed API
              Mirror styled-components:
              import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
              All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
              Sketch
              A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
              constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
              Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
              Workaround today
              We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
              Offer
              Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                No labels
                No labels
                Type
                No type
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions
                  
, '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" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
                  Skip to content
                  Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
                  Open
                  #65
                  Open
                  Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
                  #65
                  Description
                  @beautyfree
                  beautyfree
                  opened on Jun 3, 2026
                  Summary
                  There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
                  • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
                  • iframe content portals.
                  • Shadow DOM roots.
                  • Pop-out windows opened with window.open.
                  Why this is almost already supported
                  The internals already thread a target through to goober:
                  // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
                  goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
                  exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
                  so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
                  Reproduction
                  import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
                  The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
                  keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
                  Proposed API
                  Mirror styled-components:
                  import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
                  All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
                  Sketch
                  A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
                  constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
                  Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
                  Workaround today
                  We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
                  Offer
                  Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    Type
                    No type
                    Projects
                    No projects
                      Milestone
                      No milestone
                      Relationships
                      None yet
                      Development
                      No branches or pull requests
                      Issue actions
                      
, '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('^' + ".*" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
                      Skip to content
                      Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
                      Open
                      #65
                      Open
                      Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
                      #65
                      Description
                      @beautyfree
                      beautyfree
                      opened on Jun 3, 2026
                      Summary
                      There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
                      • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
                      • iframe content portals.
                      • Shadow DOM roots.
                      • Pop-out windows opened with window.open.
                      Why this is almost already supported
                      The internals already thread a target through to goober:
                      // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
                      goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
                      exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
                      so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
                      Reproduction
                      import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
                      The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
                      keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
                      Proposed API
                      Mirror styled-components:
                      import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
                      All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
                      Sketch
                      A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
                      constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
                      Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
                      Workaround today
                      We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
                      Offer
                      Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
                      Metadata
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                      No one assigned
                        Labels
                        No labels
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                        Type
                        No type
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                          None yet
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                          Issue actions
                          
, '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('^' + ".*" + '
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
                          Skip to content
                          Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
                          Open
                          #65
                          Open
                          Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
                          #65
                          Description
                          @beautyfree
                          beautyfree
                          opened on Jun 3, 2026
                          Summary
                          There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
                          • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
                          • iframe content portals.
                          • Shadow DOM roots.
                          • Pop-out windows opened with window.open.
                          Why this is almost already supported
                          The internals already thread a target through to goober:
                          // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
                          goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
                          exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
                          so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
                          Reproduction
                          import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
                          The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
                          keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
                          Proposed API
                          Mirror styled-components:
                          import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
                          All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
                          Sketch
                          A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
                          constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
                          Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
                          Workaround today
                          We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
                          Offer
                          Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            Type
                            No type
                            Projects
                            No projects
                              Milestone
                              No milestone
                              Relationships
                              None yet
                              Development
                              No branches or pull requests
                              Issue actions
                              
, '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); }
})();
})();
Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) · Issue #64 · solidjs/solid-styled-components · GitHub
                              Skip to content
                              Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM) #64
                              Open
                              #65
                              Open
                              Add StyleSheetManager / target option to inject styles into another document (Electron child windows, iframes, shadow DOM)#64
                              #65
                              Description
                              @beautyfree
                              beautyfree
                              opened on Jun 3, 2026
                              Summary
                              There is no public API to make styled / css / createGlobalStyles inject their generated <style> into a document other than the main document.head. styled-components solves this with <StyleSheetManager target={node}>. solid-styled-components has no equivalent, which breaks any multi-document rendering:
                              • Electron child BrowserWindow rendered via <Portal mount={childWin.document.body}> — the child document never receives the goober sheet, so all styled components render unstyled there.
                              • iframe content portals.
                              • Shadow DOM roots.
                              • Pop-out windows opened with window.open.
                              Why this is almost already supported
                              The internals already thread a target through to goober:
                              // src/index.js — makeStyledfunctionmakeStyled(tag){let_ctx=this||{};return(...args)=>{constStyled=props=>{
...
letclassName=css.apply({target: _ctx.target,o: append,p: withTheme,g: _ctx.g},args);
...
                              goober's css/glob honor this.target and write the sheet into that node's root (document.head or a shadow/other-document root). But styled is exported as:
                              exportconststyled=newProxy(makeStyled,{get(target,tag){returntarget(tag);}// makeStyled called with `this === undefined`});
                              so _ctx.target is always undefined → everything lands in the main document.head. There is no way for a consumer to set it.
                              Reproduction
                              import{render,Portal}from"solid-js/web";import{styled}from"solid-styled-components";constBox=styled.div`background: tomato; width: 100px; height: 100px;`;// open a second window/documentconstwin=window.open("about:blank")!;render(()=>(<Portalmount={win.document.body}><Box/>{/* renders, but the .go<hash> rule is injected into the MAIN document's <style>, never into win.document → unstyled */}</Portal>),document.getElementById("root")!);
                              The <div class="go…"> appears in win.document, but the matching CSS rule is only in the opener document's <head>, so the box is unstyled in the child window.
                              keyframes and glob/createGlobalStyles have the same limitation (they also inject into the default sheet).
                              Proposed API
                              Mirror styled-components:
                              import{StyleSheetManager}from"solid-styled-components";<Portalmount={win.document.body}><StyleSheetManagertarget={win.document.head}><App/></StyleSheetManager></Portal>
                              All styled / css.class / createGlobalStyles rendered inside the provider inject into target instead of document.head.
                              Sketch
                              A context carrying the target, read inside Styled (and the createGlobalStyles component), passed through to the existing css.apply({ target, … }) call:
                              constStyleTargetContext=createContext();exportfunctionStyleSheetManager(props){returncreateComponent(StyleTargetContext.Provider,{value: props.target,getchildren(){returnprops.children;}});}// inside Styled():consttarget=useContext(StyleTargetContext)??_ctx.target;letclassName=css.apply({ target,o: append,p: withTheme,g: _ctx.g},args);
                              Because goober already routes by target, this is a small, backward-compatible change (no behavior change when no provider is present).
                              Workaround today
                              We currently mirror every <style>/<link> from the opener document.head into the child window's head with a MutationObserver, and additionally shim keyframes so @keyframes bodies aren't dropped. It works but is fragile and duplicates the whole sheet per window.
                              Offer
                              Happy to send a PR implementing StyleSheetManager (context-threaded target) plus keyframes/glob target support, with tests. Filing this first to confirm the API shape (<StyleSheetManager target> vs a setup-level option) you'd prefer.
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Type
                                No type
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions