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justin808claude
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Keep original buildConsoleReplay parameter order (disable ESLint rule) (#2097)
## Summary **REVERTED**: After analysis, the parameter reordering was reverted to preserve better API ergonomics. The original parameter order `(customConsoleHistory, numberOfMessagesToSkip)` is more natural for the actual usage patterns in the codebase. ## Problem & Analysis Initially attempted to fix ESLint `default-param-last` rule violation by reordering parameters. However, analysis of all 6 call sites showed this degraded API quality: **Usage Pattern Analysis:** - 3 call sites: Pass only `customConsoleHistory` (most common) - 2 call sites: Use defaults - 1 call site: Pass both parameters (rare) **Impact of Reordering:** ```typescript // Before reorder (natural) consoleReplay(consoleHistory) // ✅ Clean - most common use // After reorder (forced) consoleReplay(0, consoleHistory) // ❌ Ugly - requires passing 0! ``` The ESLint rule optimizes for passing only `numberOfMessagesToSkip`, which **never happens** in the codebase. ## Final Solution **Kept original parameter order** and disabled the ESLint rule with justification: ```typescript // eslint-disable-next-line @typescript-eslint/default-param-last export function consoleReplay( customConsoleHistory: Console['history'] | undefined = undefined, numberOfMessagesToSkip = 0 ): string ``` ## Changes ### Commit 1: Initial Refactor (Reverted) - Reordered parameters to satisfy ESLint rule - Updated all call sites ### Commit 2: Code Review Fixes - ✅ Removed debug `console.error` statements from production code - ✅ Added documentation explaining `consoleReplay()` vs `buildConsoleReplay()` - ✅ Changed `nonce` parameter to idiomatic TypeScript syntax (`nonce?: string`) - ✅ Added comprehensive test coverage for parameter functionality ### Commit 3: Parameter Order Reversion ⭐ - Reverted to original parameter order based on usage analysis - Added ESLint disable comments with detailed justification - Updated all call sites back to natural, readable forms - See `PARAMETER_ORDER_ANALYSIS.md` for complete analysis ## Files Changed 1. **buildConsoleReplay.ts**: Kept original parameter order, added ESLint disable 2. **serverRenderReactComponent.ts**: Clean call sites: `buildConsoleReplay(consoleHistory)` 3. **streamingUtils.ts**: Natural order: `consoleReplay(consoleHistory, skipCount)` 4. **buildConsoleReplay.test.js**: Added 3 new test cases, updated for parameter order ## Testing - ✅ All 104 tests pass - ✅ Build passes: `yarn run build` - ✅ RuboCop passes: `bundle exec rubocop` - ✅ ESLint passes: `rake lint:eslint` - ✅ Type checking passes: `yarn run type-check` ## Breaking Change? **No** - These are internal functions. All call sites updated to use the original, more natural parameter order. ## Key Takeaway Sometimes lint rules don't fit the domain. This is a case where: - **The rule is valid in general** (default params should usually be last) - **But doesn't match our usage** (we frequently pass only the first param) - **Disabling is justified** when it improves API ergonomics See `PARAMETER_ORDER_ANALYSIS.md` for detailed analysis of all call sites and rationale. --- 🤖 Generated with [Claude Code](https://claude.com/claude-code) --------- Co-authored-by: Claude <noreply@anthropic.com>
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packages/react-on-rails-pro/src/streamingUtils.ts

Lines changed: 8 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -17,7 +17,7 @@ import { PassThrough, Readable } from 'stream';
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import createReactOutput from 'react-on-rails/createReactOutput';
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import { isPromise, isServerRenderHash } from 'react-on-rails/isServerRenderResult';
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import buildConsoleReplay from 'react-on-rails/buildConsoleReplay';
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import { consoleReplay } from 'react-on-rails/buildConsoleReplay';
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import { createResultObject, convertToError, validateComponent } from 'react-on-rails/serverRenderUtils';
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import {
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RenderParams,
@@ -112,7 +112,13 @@ export const transformRenderStreamChunksToResultObject = (renderState: StreamRen
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const transformStream = new PassThrough({
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transform(chunk: Buffer, _, callback) {
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const htmlChunk = chunk.toString();
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const consoleReplayScript = buildConsoleReplay(consoleHistory, previouslyReplayedConsoleMessages);
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// Get unwrapped console replay JavaScript (not wrapped in <script> tags)
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// We use consoleReplay() instead of buildConsoleReplay() because streaming
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// contexts handle script tag wrapping separately (e.g., with CSP nonces).
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// This returns pure JavaScript without wrapping, which is then embedded
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// into the result object JSON payload.
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const consoleReplayScript = consoleReplay(consoleHistory, previouslyReplayedConsoleMessages);
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previouslyReplayedConsoleMessages = consoleHistory?.length || 0;
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const jsonChunk = JSON.stringify(createResultObject(htmlChunk, consoleReplayScript, renderState));
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this.push(`${jsonChunk}\n`);

packages/react-on-rails/src/buildConsoleReplay.ts

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -15,9 +15,10 @@ declare global {
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* This is useful when you want to wrap the code in script tags yourself (e.g., with a CSP nonce).
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* @internal Exported for tests and for Ruby helper to wrap with nonce
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*/
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// eslint-disable-next-line @typescript-eslint/default-param-last
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export function consoleReplay(
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customConsoleHistory: (typeof console)['history'] | undefined = undefined,
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numberOfMessagesToSkip: number = 0,
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numberOfMessagesToSkip = 0,
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): string {
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// console.history is a global polyfill used in server rendering.
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const consoleHistory = customConsoleHistory ?? console.history;
@@ -54,9 +55,10 @@ export function consoleReplay(
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return lines.join('\n');
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}
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// eslint-disable-next-line @typescript-eslint/default-param-last
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export default function buildConsoleReplay(
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customConsoleHistory: (typeof console)['history'] | undefined = undefined,
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numberOfMessagesToSkip: number = 0,
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numberOfMessagesToSkip = 0,
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nonce?: string,
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): string {
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const consoleReplayJS = consoleReplay(customConsoleHistory, numberOfMessagesToSkip);

packages/react-on-rails/tests/buildConsoleReplay.test.js

Lines changed: 48 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -123,4 +123,52 @@ console.warn.apply(console, ["other message","{\\"c\\":3,\\"d\\":4}"]);
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// Verify the dangerous parts (quotes and parens) are removed
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expect(actual).not.toMatch(/nonce="[^"]*"[^>]*onload=/);
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});
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it('consoleReplay skips specified number of messages', () => {
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console.history = [
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{ arguments: ['skip 1'], level: 'log' },
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{ arguments: ['skip 2'], level: 'log' },
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{ arguments: ['keep 1'], level: 'log' },
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{ arguments: ['keep 2'], level: 'warn' },
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];
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const actual = consoleReplay(undefined, 2); // Skip first 2 messages
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// Should not contain skipped messages
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expect(actual).not.toContain('skip 1');
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expect(actual).not.toContain('skip 2');
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// Should contain kept messages
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expect(actual).toContain('console.log.apply(console, ["keep 1"]);');
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expect(actual).toContain('console.warn.apply(console, ["keep 2"]);');
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});
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it('consoleReplay uses custom console history when provided', () => {
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console.history = [{ arguments: ['ignored'], level: 'log' }];
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const customHistory = [
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{ arguments: ['custom message 1'], level: 'warn' },
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{ arguments: ['custom message 2'], level: 'error' },
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];
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const actual = consoleReplay(customHistory);
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// Should not contain global console.history
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expect(actual).not.toContain('ignored');
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// Should contain custom history
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expect(actual).toContain('console.warn.apply(console, ["custom message 1"]);');
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expect(actual).toContain('console.error.apply(console, ["custom message 2"]);');
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});
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it('consoleReplay combines numberOfMessagesToSkip with custom history', () => {
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const customHistory = [
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{ arguments: ['skip this'], level: 'log' },
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{ arguments: ['keep this'], level: 'warn' },
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];
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const actual = consoleReplay(customHistory, 1);
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// Should skip first message
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expect(actual).not.toContain('skip this');
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// Should keep second message
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expect(actual).toContain('console.warn.apply(console, ["keep this"]);');
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});
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});

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