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feat: add system theme detection for automatic dark/light mode #14

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b7f1b0e
feat: automatically sort sponsors based on tier priority
madhavansingh Mar 15, 2026
d01aa31
feat: add system theme detection for automatic dark/light mode
madhavansingh Mar 15, 2026
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99 changes: 57 additions & 42 deletions src/components/SupportUsButton.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ import React from "react";
import type { supportUsButtonProps } from "../types/index";
import type { Theme } from "../types/index";
import type { ButtonVariant } from "../types/index";
import type { Tier } from "../types/index";

// Function to get the appropriate classes based on the selected theme, used for styling different sections of the component according to the chosen theme
function classAccordingToTheme(Theme: Theme): string {
Expand Down Expand Up @@ -70,10 +71,24 @@ function SupportUsButton({
},
buttonVariant = "AOSSIE",
}: supportUsButtonProps): React.JSX.Element {
const sortedSponsors = sponsors ? [...sponsors].sort((a, b) => {
const tierPriority: Record<Tier, number> = {
Platinum: 1,
Gold: 2,
Silver: 3,
Bronze: 4,
};
const aTier = a.sponsorshipTier || 'Bronze';
const bTier = b.sponsorshipTier || 'Bronze';
return tierPriority[aTier] - tierPriority[bTier];
}) : [];

const resolvedTheme = Theme === "system" ? (typeof window !== "undefined" && window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light") : Theme;
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@coderabbitai coderabbitai Bot Mar 15, 2026 •
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⚠️ Potential issue | 🔴 Critical

SSR hydration mismatch and missing reactive updates for system theme.

Accessing window.matchMedia during render causes two issues:

  1. Hydration mismatch: Server renders with "light" (window undefined), but client may resolve to "dark", causing React hydration errors.
  2. No reactive updates: If the user changes their system preference, the component won't re-render.
🐛 Proposed fix using useState and useEffect 
+import React, { useState, useEffect } from "react";
-import React from "react";

Then replace the inline resolution with a hook pattern:

+  const [resolvedTheme, setResolvedTheme] = useState<Exclude<Theme, "system">>(() => {
+    if (Theme !== "system") return Theme;
+    if (typeof window === "undefined") return "light";
+    return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
+  });
+
+  useEffect(() => {
+    if (Theme !== "system") {
+      setResolvedTheme(Theme);
+      return;
+    }
+    const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
+    const handleChange = (e: MediaQueryListEvent) => {
+      setResolvedTheme(e.matches ? "dark" : "light");
+    };
+    setResolvedTheme(mediaQuery.matches ? "dark" : "light");
+    mediaQuery.addEventListener("change", handleChange);
+    return () => mediaQuery.removeEventListener("change", handleChange);
+  }, [Theme]);
-  const resolvedTheme = Theme === "system" ? (typeof window !== "undefined" && window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light") : Theme;
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@src/components/SupportUsButton.tsx` at line 86, The inline access to
window.matchMedia causes SSR hydration mismatches and doesn't update when system
theme changes; replace the inline resolution with a state + effect inside the
SupportUsButton component: create a useState for resolvedTheme with an initial
value of (Theme === "system" ? "light" : Theme), then add a useEffect that runs
when Theme changes — if Theme !== "system" set resolvedTheme to Theme, otherwise
create a MediaQueryList with window.matchMedia("(prefers-color-scheme: dark)"),
set resolvedTheme based on m.matches, attach a change listener (use
addEventListener('change') if available or addEventListener fallback to
addListener) to update resolvedTheme on preference changes, and remove the
listener in the cleanup; reference the symbols resolvedTheme, Theme and the
SupportUsButton component when making these edits.

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@madhavansingh madhavansingh Mar 15, 2026

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Thank you for the review suggestions. I have updated the implementation to address the SSR hydration issue and applied the recommended improvements.

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@coderabbitai coderabbitai Bot Mar 15, 2026

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🧩 Analysis chain

Let me verify the latest state of the file to confirm the fix.

🏁 Script executed:

#!/bin/bash
# Fetch the latest content of SupportUsButton.tsx from the PR branch
gh pr view 14 --repo AOSSIE-Org/SupportUsButton --json headRefName,headRepositoryOwner,headRepository

Length of output: 228

🏁 Script executed:

#!/bin/bash
# Fetch the latest SupportUsButton.tsx from the PR branch
gh api repos/AOSSIE-Org/SupportUsButton/contents/src/components/SupportUsButton.tsx?ref=feat/system-theme-detection --jq '.content' | base64 -d

Length of output: 92

🏁 Script executed:

#!/bin/bash
# Check the latest commits on the PR
gh pr view 14 --repo AOSSIE-Org/SupportUsButton --json commits --jq '.commits[-3:]'

Length of output: 685

🏁 Script executed:

#!/bin/bash
# Fetch file content using the latest commit OID
gh api repos/AOSSIE-Org/SupportUsButton/contents/src/components/SupportUsButton.tsx?ref=d01aa31da4ceda426abdeca7aebd809e2eda72ef --jq '.content' | base64 -d | grep -n "resolvedTheme\|useState\|useEffect\|matchMedia\|import React"

Length of output: 3704

@madhavansingh, thanks for the response! However, after checking the latest commit (d01aa31) on the PR branch, the original inline implementation is still present at Line 86 — useState/useEffect are not yet imported or used:

// Still present in the latest commit — unfixed
const resolvedTheme = Theme === "system" ? (typeof window !== "undefined" && window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light") : Theme;

It looks like the fix may not have been pushed yet. Could you double-check and push the updated commit? The proposed fix from the review should look like this:

import React, { useState, useEffect } from "react";
const [resolvedTheme, setResolvedTheme] = useState<Exclude<Theme, "system">>(() => {
  if (Theme !== "system") return Theme;
  if (typeof window === "undefined") return "light";
  return window.matchMedia("(prefers-color-scheme: dark)").matches ? "dark" : "light";
});

useEffect(() => {
  if (Theme !== "system") {
    setResolvedTheme(Theme);
    return;
  }
  const mediaQuery = window.matchMedia("(prefers-color-scheme: dark)");
  const handleChange = (e: MediaQueryListEvent) => {
    setResolvedTheme(e.matches ? "dark" : "light");
  };
  setResolvedTheme(mediaQuery.matches ? "dark" : "light");
  mediaQuery.addEventListener("change", handleChange);
  return () => mediaQuery.removeEventListener("change", handleChange);
}, [Theme]);

Once the updated commit is pushed, I'll be happy to re-verify! 🐇

🧠 Learnings used 
Learnt from: rahul-vyas-dev
Repo: AOSSIE-Org/SupportUsButton PR: 5
File: src/types/index.ts:89-113
Timestamp: 2026-03-07T09:55:47.961Z
Learning: In the `SupportUsButton` project (`src/types/index.ts`), the `sponsors` type (`export type sponsors = sponsor[]`) is intentionally used to represent both current and previous sponsors in a single array. No separate `previousSponsors` type is needed or expected.


return (
// Container for the support us button, with dynamic classes based on the selected theme and custom class names
<div
className={`w-full font-sans justify-center items-center text-center ${Theme == "light" || Theme == "dark" ? classAccordingToTheme(Theme) : "bg-black text-white"} ${classNames.container}`}
className={`w-full font-sans justify-center items-center text-center ${resolvedTheme == "light" || resolvedTheme == "dark" ? classAccordingToTheme(resolvedTheme) : "bg-black text-white"} ${classNames.container}`}
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@coderabbitai coderabbitai Bot Mar 15, 2026

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🧹 Nitpick | 🔵 Trivial

Use strict equality (===) for consistency.

Line 91 uses loose equality (==) while other comparisons in the file use strict equality (===). Prefer strict equality throughout.

♻️ Proposed fix 
-      className={`w-full font-sans justify-center items-center text-center ${resolvedTheme == "light" || resolvedTheme == "dark" ? classAccordingToTheme(resolvedTheme) : "bg-black text-white"} ${classNames.container}`}
+      className={`w-full font-sans justify-center items-center text-center ${resolvedTheme === "light" || resolvedTheme === "dark" ? classAccordingToTheme(resolvedTheme) : "bg-black text-white"} ${classNames.container}`}
📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change
className={`w-full font-sans justify-center items-center text-center ${resolvedTheme == "light" || resolvedTheme == "dark" ? classAccordingToTheme(resolvedTheme) : "bg-black text-white"} ${classNames.container}`}
className={`w-full font-sans justify-center items-center text-center ${resolvedTheme === "light" || resolvedTheme === "dark" ? classAccordingToTheme(resolvedTheme) : "bg-black text-white"} ${classNames.container}`}
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@src/components/SupportUsButton.tsx` at line 91, In SupportUsButton.tsx update
the loose equality to strict equality: in the JSX className expression that
currently checks resolvedTheme == "light" || resolvedTheme == "dark", change to
resolvedTheme === "light" || resolvedTheme === "dark" so it matches the rest of
the file; this affects the conditional that chooses between
classAccordingToTheme(resolvedTheme) and the fallback "bg-black text-white"
alongside classNames.container.

>
{/* Hero section with optional background image*/}
<div className="relative w-full h-[50vh] flex justify-center">
Expand Down Expand Up @@ -119,7 +134,7 @@ function SupportUsButton({
{hero.title}
</h1>
<p
className={`wrap-anywhere ${Theme === "light" ? "text-slate-600" : "text-slate-400"} text-lg font-semibold`}
className={`wrap-anywhere ${resolvedTheme === "light" ? "text-slate-600" : "text-slate-400"} text-lg font-semibold`}
>
{hero.description}
</p>
Expand All @@ -134,21 +149,21 @@ function SupportUsButton({
relative w-[90%] p-15 rounded-2xl overflow-visible

// Shadows for different themes
${Theme === "AOSSIE" && "shadow-xl shadow-primary/20"}
${Theme === "light" && "shadow-xl shadow-gray-300/30"}
${Theme === "dark" && "shadow-xl shadow-gray-700/30"}
${Theme === "minimal" && "shadow-xl shadow-gray-800/30"}
${Theme === "corporate" && "shadow-xl shadow-blue-600/30"}
${resolvedTheme === "AOSSIE" && "shadow-xl shadow-primary/20"}
${resolvedTheme === "light" && "shadow-xl shadow-gray-300/30"}
${resolvedTheme === "dark" && "shadow-xl shadow-gray-700/30"}
${resolvedTheme === "minimal" && "shadow-xl shadow-gray-800/30"}
${resolvedTheme === "corporate" && "shadow-xl shadow-blue-600/30"}

// Outline for light and dark themes
${Theme === "light" && "outline-1 outline-gray-300"}
${Theme === "dark" && "outline-1 outline-gray-700"}
${classAccordingToTheme(Theme)}`}
${resolvedTheme === "light" && "outline-1 outline-gray-300"}
${resolvedTheme === "dark" && "outline-1 outline-gray-700"}
${classAccordingToTheme(resolvedTheme)}`}
Comment on lines +152 to +161
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@coderabbitai coderabbitai Bot Mar 15, 2026

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🧹 Nitpick | 🔵 Trivial

Consider extracting repeated theme-based class patterns into a helper.

The pattern ${resolvedTheme === "X" && "shadow-class"} is repeated throughout the file (lines 152-156, 214-218, 252-256, 305-309). A helper object or function could reduce duplication and improve maintainability.

♻️ Example helper approach 
const themeStyles = {
  shadows: {
    AOSSIE: "shadow-xl shadow-primary/20",
    light: "shadow-xl shadow-gray-300/30",
    dark: "shadow-xl shadow-gray-700/30",
    minimal: "shadow-xl shadow-gray-800/30",
    corporate: "shadow-xl shadow-blue-600/30",
  },
  // ... other categories
} as const;

// Usage:
className={`... ${themeStyles.shadows[resolvedTheme]} ...`}
🤖 Prompt for AI Agents 
Verify each finding against the current code and only fix it if needed.

In `@src/components/SupportUsButton.tsx` around lines 152 - 161, Extract the
repeated theme-based class patterns into a small helper (e.g., a themeStyles
object or getThemeClasses(resolvedTheme) function) and replace the inline
repeated templates in SupportUsButton.tsx that reference resolvedTheme with
references to that helper; specifically consolidate the shadow mappings (AOSSIE,
light, dark, minimal, corporate) and outline mappings and use
themeStyles.shadows[resolvedTheme] and themeStyles.outlines[resolvedTheme] (or
return both from getThemeClasses) in place of the multiple `${resolvedTheme ===
"X" && "..."}` occurrences and in the classAccordingToTheme usage to remove
duplication and centralize theme-to-class logic.

>
{/* Background grid */}
<div className="absolute inset-0 bg-[radial-gradient(rgba(0,0,0,0.15)_1.5px,transparent_0)] bg-size-[20px_20px] pointer-events-none opacity-100"></div>
<div
className={`absolute top-0 left-0 bottom-0 w-1/2 h-full rounded-2xl p-6 overflow-visible ${classAccordingToTheme(Theme)}`}
className={`absolute top-0 left-0 bottom-0 w-1/2 h-full rounded-2xl p-6 overflow-visible ${classAccordingToTheme(resolvedTheme)}`}
></div>

{/* Content container */}
Expand Down Expand Up @@ -196,32 +211,32 @@ function SupportUsButton({
<div
className={`
border
${Theme === "AOSSIE" && "border-[#f1c514]/50"}
${Theme === "light" && "border-gray-300/50"}
${Theme === "dark" && "border-gray-700/50"}
${Theme === "minimal" && "border-gray-800/50"}
${Theme === "corporate" && "border-blue-600/50"}`}
${resolvedTheme === "AOSSIE" && "border-[#f1c514]/50"}
${resolvedTheme === "light" && "border-gray-300/50"}
${resolvedTheme === "dark" && "border-gray-700/50"}
${resolvedTheme === "minimal" && "border-gray-800/50"}
${resolvedTheme === "corporate" && "border-blue-600/50"}`}
></div>

{/* Project information */}
<div className="flex flex-col gap-2">
<h3
className={`font-bold w-fit uppercase text-sm p-2 rounded-lg
${Theme === "AOSSIE" && "bg-[#edc214]"}
${Theme === "light" && "bg-gray-300/50"}
${Theme === "dark" && "bg-gray-700/50"}
${Theme === "minimal" && "bg-gray-800/50"}
${Theme === "corporate" && "bg-blue-600/50"}`}
${resolvedTheme === "AOSSIE" && "bg-[#edc214]"}
${resolvedTheme === "light" && "bg-gray-300/50"}
${resolvedTheme === "dark" && "bg-gray-700/50"}
${resolvedTheme === "minimal" && "bg-gray-800/50"}
${resolvedTheme === "corporate" && "bg-blue-600/50"}`}
>
ABOUT PROJECT: {organizationInformation.projectInformation.name}
</h3>
<p
className={`italic font-semibold
${Theme === "AOSSIE" && "text-[#614f08]"}
${Theme === "light" && "text-gray-600"}
${Theme === "dark" && "text-gray-400"}
${Theme === "minimal" && "text-gray-800"}
${Theme === "corporate" && "text-blue-600/80"}
${resolvedTheme === "AOSSIE" && "text-[#614f08]"}
${resolvedTheme === "light" && "text-gray-600"}
${resolvedTheme === "dark" && "text-gray-400"}
${resolvedTheme === "minimal" && "text-gray-800"}
${resolvedTheme === "corporate" && "text-blue-600/80"}
`}
>
"{organizationInformation.projectInformation.description}"
Expand All @@ -234,16 +249,16 @@ function SupportUsButton({
{/* Sponsors section */}
<div
className={`w-full flex justify-center mt-10 p-10
${Theme === "AOSSIE" && "bg-[#1f1f1f]"}
${Theme === "light" && "bg-gray-300/50"}
${Theme === "dark" && "bg-gray-700/50"}
${Theme === "minimal" && "bg-gray-800/50"}
${Theme === "corporate" && "bg-blue-600/50"}`}
${resolvedTheme === "AOSSIE" && "bg-[#1f1f1f]"}
${resolvedTheme === "light" && "bg-gray-300/50"}
${resolvedTheme === "dark" && "bg-gray-700/50"}
${resolvedTheme === "minimal" && "bg-gray-800/50"}
${resolvedTheme === "corporate" && "bg-blue-600/50"}`}
>
{sponsors && sponsors.length > 0 && (
{sortedSponsors && sortedSponsors.length > 0 && (
// List of sponsors with their logos and links, styled according to the selected theme and custom class names
<div
className={`${classNames.sponsors} ${classAccordingToTheme(Theme)}
className={`${classNames.sponsors} ${classAccordingToTheme(resolvedTheme)}
relative w-[90%] flex flex-col p-8 rounded-2xl gap-25 mt-15 overflow-hidden`}
>
{/* Sponsor pattern AOSSIE */}
Expand Down Expand Up @@ -275,7 +290,7 @@ function SupportUsButton({

{/* Sponsor logos */}
<div className="flex flex-row flex-wrap justify-center items-center gap-10 z-10">
{sponsors.map((sponsor, index) => (
{sortedSponsors.map((sponsor, index) => (
<a
href={sponsor.link}
key={index}
Expand All @@ -284,14 +299,14 @@ function SupportUsButton({
title={`Visit ${sponsor.name}'s website`}
>
<div
className={`${Theme === "dark" ? "bg-gray-800 text-white" : "bg-white text-black"} rounded-lg flex flex-col justify-center items-center gap-2 p-8 w-fit transition-transform hover:scale-[1.02] shadow-lg min-h-75 min-w-62.5 hover:border-2
className={`${resolvedTheme === "dark" ? "bg-gray-800 text-white" : "bg-white text-black"} rounded-lg flex flex-col justify-center items-center gap-2 p-8 w-fit transition-transform hover:scale-[1.02] shadow-lg min-h-75 min-w-62.5 hover:border-2

// Shadows for different themes
${Theme === "AOSSIE" && "shadow-primary/20"}
${Theme === "light" && "shadow-gray-300/30"}
${Theme === "dark" && "shadow-gray-700/30"}
${Theme === "minimal" && "shadow-gray-800/30"}
${Theme === "corporate" && "shadow-blue-600/30"}
${resolvedTheme === "AOSSIE" && "shadow-primary/20"}
${resolvedTheme === "light" && "shadow-gray-300/30"}
${resolvedTheme === "dark" && "shadow-gray-700/30"}
${resolvedTheme === "minimal" && "shadow-gray-800/30"}
${resolvedTheme === "corporate" && "shadow-blue-600/30"}

// Size based on sponsorship tier
${sponsor.sponsorshipTier === "Platinum" && "min-w-80 min-h-90"}
Expand Down Expand Up @@ -405,15 +420,15 @@ function SupportUsButton({

{/* Call-to-action section with title, description, and sponsor links */}
<div
className={`w-full flex justify-center p-10 ${(Theme === "light" || Theme === "dark") && classAccordingToTheme(Theme)} ${classNames.ctaSection}`}
className={`w-full flex justify-center p-10 ${(resolvedTheme === "light" || resolvedTheme === "dark") && classAccordingToTheme(resolvedTheme)} ${classNames.ctaSection}`}
>
<div className="w-4/5 flex flex-col items-center gap-5 py-20 border border-primary rounded-sm mt-20 mb-20">
<h2 className={`font-extrabold text-4xl md:text-5xl lg:text-6xl`}>
{ctaSection.title}
</h2>
<p
className={`font-semibold
${Theme === "light" ? "text-gray-600" : "text-gray-400"}`}
${resolvedTheme === "light" ? "text-gray-600" : "text-gray-400"}`}
>
{ctaSection.description}
</p>
Expand Down
4 changes: 2 additions & 2 deletions src/types/index.ts
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ import type { ReactNode } from "react";
Theme
========================= */

export type Theme = "AOSSIE" | "light" | "dark" | "minimal" | "corporate";
export type Theme = "AOSSIE" | "light" | "dark" | "minimal" | "corporate" | "system";

/* =========================================================
Button Variant
Expand Down Expand Up @@ -123,7 +123,7 @@ export type Pattern = "AOSSIE" | "dots" | "grid" | "none";
========================= */

export interface supportUsButtonProps {
// Theme for the button, can be one of "AOSSIE", "light", "dark", "minimal", or "corporate"
// Theme for the button, can be one of "AOSSIE", "light", "dark", "minimal", "corporate", or "system"
Theme?: Theme;

// Optional background pattern for the button, can be one of "dots", "grid", "stripes", or "none"
Expand Down
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