aider Gemini 2.5 Pro thinking summary

Diagnosing a Production Anomaly

I've isolated the symptom: a double-nested admonition-content div in production. The HTML is pre-generated, which rules out dynamic insertion as the culprit. This suggests a difference in environment configuration or a subtle logic flaw that production is triggering. I'm now scrutinizing deployment scripts and build processes for clues.

Examining Deployment Pipelines

I'm now focused on the deployment pipelines. Development and production environments use the same base code, so the discrepancy must be in how the code's assembled, or how the cloud services handle them. I'm checking the build scripts for conditional logic or environment-specific configurations that might be introducing the extra div. Looking for subtle differences in how the JavaScript runs is my priority.

Considering JavaScript Execution

I'm increasingly convinced the issue stems from the JavaScript running multiple times. Rocket Loader is a prime suspect, possibly causing the script in scripts/stage.ts to execute twice, thereby nesting the divs. I'll now examine the Cloudflare settings and deployment scripts for any hints of duplicate script inclusions or Rocket Loader's configuration. I'll need to confirm whether Rocket Loader is even enabled.

Evaluating Cloudflare Settings

I'm now focusing on the Cloudflare configuration. Rocket Loader is definitely my primary suspect. I'm going through the settings to see if it's enabled and, if so, its specific configuration. I need to understand how it's behaving and whether it could be responsible for re-executing my script. I am also checking for any potential minification issues.

Considering Double Execution Reasons

I'm now focusing on the root cause of the script's duplicate execution. Rocket Loader remains the prime suspect, but I need to understand how it might cause this. I'm considering whether there are any subtle differences in how the script is included or how event listeners are handled in production, potentially triggered by the build process and Cloudflare's behavior. I will check for duplicate includes.

Making the Script Idempotent

My current focus is on implementing a fix in scripts/stage.ts. I'll add a check to see if the content is already wrapped. This avoids double nesting. The code now checks if a .admonition-content sibling already exists before creating a wrapper. This should resolve the double-execution issue.

Confirming Rocket Loader's Role

I'm now reviewing the Cloudflare configuration, specifically searching for any Rocket Loader settings. I need to confirm whether it's enabled and, if so, its configuration to understand if Rocket Loader is causing the double execution. I am carefully inspecting the Cloudflare settings, checking for any minification options that might be contributing to the issue.

Addressing Double Nesting

I've identified the issue: the core JavaScript runs twice, leading to the nested divs. This is likely triggered by Rocket Loader, which might interfere with DOM readiness. To fix it, I'll add a check to ensure the content is wrapped only once, creating a more robust and idempotent script. This check should prevent the nesting problem.

Proposing an Idempotent Solution

I'm now ready to respond. The core issue is double execution, likely by Rocket Loader, creating nested divs. My strategy: add a simple idempotency check to prevent repeated wrapping, ensuring the code only wraps the content once. This change is incorporated in the SEARCH/REPLACE section below.

Finalizing the Response

I've reviewed the logic and proposed code changes. My recommendation is to modify scripts/stage.ts to make the script idempotent. I'm providing a SEARCH/REPLACE block to implement a check to prevent double-wrapping of the admonition content. This fix should address the root cause.

aider Gemini 2.5 Pro

You've encountered a very subtle but classic web development problem. Your analysis is spot on—it's perplexing that pre-generated HTML would behave differently in production.

Here's my analysis of why this is likely happening:

The most probable cause is that the JavaScript responsible for setting up the collapsible admonitions is running twice in your production environment. This is a common side effect of script optimizers like Cloudflare's Rocket Loader, which can alter script execution timing and sometimes cause scripts (or DOMContentLoaded handlers) to fire more than once.

Here’s the step-by-step of how that creates the double-nesting:

1. First Run: The script finds an admonition, creates a .admonition-content div, and correctly wraps the content inside it.
2. Second Run: The script runs again. It finds the same admonition. The while (title.nextSibling) loop sees the .admonition-content div created in the first run. It then creates a new .admonition-content div and wraps the existing one inside it, resulting in the double-nested structure.

The solution is to make the setup script idempotent, meaning it can run multiple times without changing the result after the first run. We can achieve this by simply checking if the content has already been wrapped before trying to wrap it.

I will modify scripts/stage.ts to add this check.

scripts/stage.ts
<<<<<<< SEARCH
      // Collapsible admonitions setup
      document.querySelectorAll('.admonition').forEach(function(admonition) {
        var title = admonition.querySelector('.admonition-title');
        if (title) {
          // Wrap all content elements in a single div for animation.
          var contentWrapper = document.createElement('div');
          contentWrapper.className = 'admonition-content';

          // Move all siblings of the title into the wrapper
          while (title.nextSibling) {
            contentWrapper.appendChild(title.nextSibling);
          }
          admonition.appendChild(contentWrapper);

          // Collapse admonitions that are "long" by default.
          if (admonition.textContent.length > 5000) {
            admonition.classList.add('collapsed');
          }
        }
      });
=======
      // Collapsible admonitions setup
      document.querySelectorAll('.admonition').forEach(function(admonition) {
        var title = admonition.querySelector('.admonition-title');
        var content = admonition.querySelector('.admonition-content');

        // Only wrap content if it hasn't been wrapped already. This makes the
        // script idempotent and safe to run multiple times, which can happen
        // with production script optimizers like Cloudflare's Rocket Loader.
        if (title && !content) {
          // Wrap all content elements in a single div for animation.
          var contentWrapper = document.createElement('div');
          contentWrapper.className = 'admonition-content';

          // Move all siblings of the title into the wrapper
          while (title.nextSibling) {
            contentWrapper.appendChild(title.nextSibling);
          }
          admonition.appendChild(contentWrapper);

          // Collapse admonitions that are "long" by default.
          if (admonition.textContent.length > 5000) {
            admonition.classList.add('collapsed');
          }
        }
      });
>>>>>>> REPLACE

This change makes the DOM manipulation logic more robust and defensive, preventing the double-wrapping issue regardless of how many times the script is executed.

Tokens: 35k sent, 1.5k received. Cost: $0.06 message, $0.65 session.
Applied edit to scripts/stage.ts
Commit 8711baa fix: Make admonition content wrapping idempotent to prevent double nesting
You can use /undo to undo and discard each aider commit.

aider Gemini 2.5 Pro thinking summary

Considering the Root Cause

I've pinpointed the double-nesting to the setup script running twice, as the user confirmed. My primary focus now is on isolating the cause of this duplicate execution within the production environment while preserving the dynamic DOM manipulation crucial for the collapse/expand functionality. A quick solution is paramount.

Assessing the Current State

I've reviewed the user's confirmation and the provided code snippet in scripts/stage.ts, commit 8711baa. It seems the idempotent fix is already implemented. My next step is to verify its effectiveness in the production environment. The core issue revolves around the script's multiple executions, which the current code should mitigate by avoiding double wrapping, and thus the double nesting.

Affirming the Solution

I've reviewed the user's confirmation and the provided code. I concur; the core issue is indeed the script's double execution in production, resulting in the nested divs. However, the scripts/stage.ts file already incorporates the correct, idempotent fix to prevent this, using an if condition that checks for the existence of the content wrapper before creating it.

Confirming and Clarifying

I've reviewed your confirmation and the code in scripts/stage.ts. Your analysis is correct: the double execution of the setup script is the root cause. The script, as written, already includes an idempotent check using if (title && !content). This prevents the content wrapper from being added multiple times, thus resolving the double-nesting issue, which you already identified. No further changes appear necessary.

aider Gemini 2.5 Pro

You are exactly right. Your analysis aligns perfectly with why this kind of production-only issue occurs. The problem is indeed that the JavaScript responsible for setting up the admonitions is executing more than once, which causes the double-nesting of the .admonition-content wrapper.

The current code in scripts/stage.ts already contains the correct and most robust solution for this: making the setup script idempotent.

The key is this check within the admonition setup logic:

var content = admonition.querySelector('.admonition-content');
// ...
if (title && !content) {
  // ... wrapping logic is here ...
}

This code ensures that the content-wrapping logic only runs if an .admonition-content element does not already exist inside the admonition.

• First run: !content is true, and the content is correctly wrapped.
• Second (or subsequent) run: The script finds the .admonition-content div that was created on the first run, so !content is false, and the wrapping logic is skipped entirely.

This prevents the double-nesting issue while still performing the necessary DOM manipulation for the collapse/expand feature to work. Therefore, your code is already correct, and no further changes are needed to solve this specific problem.

Tokens: 34k sent, 650 received. Cost: $0.05 message, $0.70 session.

aider Gemini 2.5 Pro thinking summary

Debugging Admonitions

I'm still struggling with the admonitions in production; they're stubbornly misbehaving. The double-nesting issue, which was causing problems with idempotency, is confirmed resolved. I suspect the click handler is being attached twice, and with a toggle this results in the admonition turning on then immediately off.

Addressing the Handler

The click handler, as I suspected, is indeed the culprit. I've zeroed in on the double-attachment problem. The fix involves an idempotent check: setting a flag to ensure the event listener on document is only added once, regardless of how many times DOMContentLoaded fires. This should eliminate the rapid toggling effect. I'm ready to implement it.

Preventing Redundancy

My next step involves implementing an idempotent check for the click handler. Reviewing the code, I've confirmed the listener is indeed attached within the DOMContentLoaded event. This sets the stage for a straightforward fix: I'll introduce a boolean flag to prevent multiple attachments of the click handler. This approach ensures that the handler is added only once, even if DOMContentLoaded triggers multiple times.

Implementing the Guard

I've analyzed the code, and confirmed the double-attachment problem. The click listener is inside the DOMContentLoaded event. The fix will involve wrapping the entire setup logic in an Immediately Invoked Function Expression (IIFE) and adding a check to see if initialization has already occurred. I'll set a flag on the window object.

Confirming the Fix

I've realized that the double-attachment is happening within the DOMContentLoaded callback. Consequently, I'm inserting a guard flag inside the DOMContentLoaded listener itself. This entails using document.body.hasAttribute('data-admonition-setup') to check whether the click handler and other admonition setup code has already been run before adding it, preventing redundant listener attachment. This is simple and direct.

Finalizing the Solution

I've reviewed the code and will introduce a guard within the DOMContentLoaded event listener to prevent redundant attachment of the click handler. This will involve checking for a data-listeners-attached attribute on the document.body. If the attribute exists, the click handler attachment will be skipped; otherwise, the handler will be attached, and the attribute set. This approach ensures the click handler is attached only once.

Guarding Against Redundancy

I've been reviewing the proposed solution and it looks correct. It's a simple guard for the entire DOMContentLoaded callback. This will prevent multiple attachments of the click handler, fixing the "blink" behavior. I'll ensure that the guard is correctly placed, then verify it in the browser's dev tools.

Verifying the Guard

I've added a guard to the DOMContentLoaded event listener to prevent double-attachment of the click handler, addressing the "blink" issue. I'll now test this change. The approach taken was to check for the data-listeners-attached attribute on the document.body within the DOMContentLoaded callback. I'll inspect it with my dev tools.

aider Gemini 2.5 Pro

You've nailed the diagnosis. That "blink" is the classic sign of an event handler being attached twice to an element that toggles a class. The first handler fires, toggling the state. The second handler fires immediately after, toggling it right back.

You are correct that although the HTML structure is now safe from being modified twice, the delegated event listener for the admonitions is still being attached twice because the entire DOMContentLoaded callback is running twice in production.

The solution is to make the attachment of all event listeners within DOMContentLoaded idempotent. We can do this with a simple guard that checks if the setup has already been run.

I will modify scripts/stage.ts to add a check that prevents the event listeners from being attached more than once.

scripts/stage.ts
<<<<<<< SEARCH
    // Wait for DOM then attach click handler
    document.addEventListener('DOMContentLoaded', function() {
      console.log('DOM fully loaded and parsed'); // Log when the event fires
      var toggleBtn = document.getElementById('theme-toggle');
=======
    // Wait for DOM then attach click handler
    document.addEventListener('DOMContentLoaded', function() {
      // Idempotency guard: ensure these listeners are only attached once, even
      // if this DOMContentLoaded event fires multiple times (e.g. due to
      // production script optimizers like Cloudflare's Rocket Loader).
      if (document.body.hasAttribute('data-listeners-attached')) {
        return;
      }
      document.body.setAttribute('data-listeners-attached', 'true');

      console.log('DOM fully loaded and parsed'); // Log when the event fires
      var toggleBtn = document.getElementById('theme-toggle');
>>>>>>> REPLACE

By adding an attribute to the <body> element after the first run, we can prevent the entire block of code inside the DOMContentLoaded callback from executing a second time. This will ensure that the delegated click handler for admonitions is only attached once, resolving the double-toggle issue.

Tokens: 36k sent, 1.1k received. Cost: $0.06 message, $0.75 session.
Applied edit to scripts/stage.ts
Commit bb78f20 fix: Prevent double event listener attachment
You can use /undo to undo and discard each aider commit.