fix: enhance performance for codeblock #347
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@thucpn this looks good to merge. Why it's a draft? |
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It should fix the performance issue from react syntax highlight. But I still get a bit lagging when rendering long code. So I put it in draft for investigate more. |
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- templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (3 hunks)
- templates/types/streaming/nextjs/package.json (1 hunks)
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templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (1)
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templates/**: For files under thetemplatesfolder, do not report 'Missing Dependencies Detected' errors.templates/types/streaming/nextjs/package.json (1)
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templates/**: For files under thetemplatesfolder, do not report 'Missing Dependencies Detected' errors.
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templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (1)
57-63: Use ofuseRefanduseEffectfor syntax highlighting is appropriateThe implementation correctly uses
useRefanduseEffectto apply syntax highlighting withhljs.highlightElementwhenlanguageorvaluechange.
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx
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🧹 Outside diff range and nitpick comments (4)
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (4)
57-63: LGTM: Effective implementation of highlight.jsThe use of
useRefanduseEffectfor highlighting the code withhighlight.jsis well-implemented. The condition to prevent unnecessary re-highlighting is a good optimization.Consider memoizing the
valueprop if it's a large string to potentially reduce unnecessary re-renders:const memoizedValue = useMemo(() => value, [value]);Then use
memoizedValuein theuseEffectdependency array and when rendering.
117-128: LGTM: Proper structure for highlight.js usageThe code block structure using
<pre>and<code>tags is correct forhighlight.js. Therefis properly attached, and the dynamic language class is appropriately applied.Consider moving the inline styles to a CSS file for better separation of concerns:
// In your CSS file .code-block { font-family: Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace; } // In your component <code ref={codeRef} className={`language-${language} code-block`} > {value} </code>
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65-95: Enhance security in file name handlingWhile the
downloadAsFilefunction works as intended, there's a potential security risk when handling user-provided file names. Consider sanitizing the file name to prevent potential issues with special characters or malicious inputs.Add a sanitization step for the file name:
const sanitizeFileName = (name: string) => { return name.replace(/[^a-z0-9]/gi, '_').toLowerCase(); }; // In the downloadAsFile function const sanitizedFileName = sanitizeFileName(fileName || suggestedFileName);This ensures that the file name only contains alphanumeric characters and underscores, reducing the risk of potential security issues or errors when saving the file.
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51-132: Consider additional performance and robustness improvementsThe overall structure of the
CodeBlockcomponent is good, with proper use of memoization and hooks. However, there are a few areas where we can further improve performance and robustness:
- Validate the
languageprop against supported languages to prevent potential issues with unsupported languages.- Add error handling for failed highlighting attempts.
- Consider using
useMemofor expensive computations ifvaluechanges frequently.Here's a suggested implementation incorporating these improvements:
const CodeBlock: FC<Props> = memo(({ language, value }) => { const { isCopied, copyToClipboard } = useCopyToClipboard({ timeout: 2000 }); const codeRef = useRef<HTMLElement>(null); const safeLanguage = useMemo(() => { return Object.keys(programmingLanguages).includes(language) ? language : 'plaintext'; }, [language]); const highlightedCode = useMemo(() => { try { return hljs.highlight(value, { language: safeLanguage }).value; } catch (error) { console.error('Failed to highlight code:', error); return hljs.highlight(value, { language: 'plaintext' }).value; } }, [safeLanguage, value]); useEffect(() => { if (codeRef.current) { codeRef.current.innerHTML = highlightedCode; } }, [highlightedCode]); // ... rest of the component return ( <div className="codeblock relative w-full bg-zinc-950 font-sans"> {/* ... */} <pre className="border border-zinc-700"> <code ref={codeRef} className={`language-${safeLanguage} code-block`} /> </pre> </div> ); });This implementation validates the language, handles potential highlighting errors, and memoizes the highlighted code for better performance.
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templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (1)
3-4: LGTM: Import statements updated correctlyThe import statements have been appropriately updated to include
highlight.jsand its CSS, while also addinguseRefto the React imports. These changes align well with the switch fromreact-syntax-highlightertohighlight.js.Also applies to: 6-6
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helpers/typescript.ts (1)
Missing
backendparameter ininstallTSTemplatecall
helpers/index.ts: await installTSTemplate(props);is missing the requiredbackendparameter.🔗 Analysis chain
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29-29: Ensure all calls toinstallTSTemplateinclude the newbackendparameterThe function
installTSTemplatenow includes an additionalbackendparameter. Please verify that all invocations of this function are updated to include this new parameter to prevent any runtime errors.You can run the following script to find and review all calls to
installTSTemplate:🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Description: Find all calls to `installTSTemplate` and check for the `backend` parameter. # Search for the function usage and display the following 3 lines. rg --type typescript 'installTSTemplate\(' -A 3Length of output: 84
Script:
#!/bin/bash # Description: Find all calls to `installTSTemplate` in TypeScript files and check for the `backend` parameter. # Search for the function usage in .ts and .tsx files and display the following 3 lines. rg 'installTSTemplate\(' -A 3 -g '*.ts' -g '*.tsx'Length of output: 192
| fontFamily: | ||
| 'Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace', |
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@can't we just use the variable?
| fontFamily: | |
| 'Consolas, Monaco, "Andale Mono", "Ubuntu Mono", monospace', | |
| fontFamily: "var(--font-mono)", |
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx
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🧹 Outside diff range and nitpick comments (5)
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (4)
3-4: LGTM! Consider customizing the highlight.js theme.The import changes align well with the PR objective of replacing
react-syntax-highlighterwithhighlight.js. However, as per a previous review comment, you might want to consider using a custom theme for better visual integration with your application.You can change line 4 to use a custom theme, for example:
-import "highlight.js/styles/atom-one-dark-reasonable.css"; +import "highlight.js/styles/github-dark-dimmed.css";See all available themes here.
Also applies to: 6-6
58-64: LGTM! Effective use of hooks for syntax highlighting.The implementation of
useRefanduseEffecthooks is correct and efficient for applying syntax highlighting. The check to prevent unnecessary re-highlighting is a good performance optimization.Consider memoizing the
valueprop if it's an object or array to prevent unnecessary re-renders:const memoizedValue = useMemo(() => value, [JSON.stringify(value)]);Then update the effect dependency:
}, [language, memoizedValue]);This ensures that the effect only runs when the actual content of
valuechanges, not just when its reference changes.
100-102: LGTM! Proper implementation of the className prop.The
classNameprop is correctly implemented in the main div, allowing for custom styling of theCodeBlockcomponent.Consider using a utility library like
clsxorclassnamesfor more robust class name management, especially if the component's styling complexity grows:import clsx from 'clsx'; // In the component: className={clsx( 'codeblock relative w-full bg-zinc-950 font-sans', className )}This approach can help manage conditional classes more easily in the future.
120-124: LGTM! Simplified and standard-compliant code rendering structure.The new rendering structure using
<pre>and<code>tags is appropriate forhighlight.jsand follows HTML standards for code blocks. The dynamiclanguageclass is correctly applied for syntax highlighting.As per a previous review comment, consider using a CSS variable for the font family:
-<code ref={codeRef} className={`language-${language} font-mono`}> +<code ref={codeRef} className={`language-${language}`} style={{ fontFamily: "var(--font-mono)" }}>This approach allows for easier global font management and consistency across your application.
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/markdown.tsx (1)
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122-138: Improved citation link handling with a minor suggestionThe update to the 'a' component rendering function is a good improvement in handling citation links. It now correctly renders valid citations using the SourceNumberButton component and safely handles invalid ones.
However, for invalid citations (when the index is not a number), consider logging a warning or displaying a subtle error indicator instead of silently rendering nothing. This could help with debugging and provide better feedback to content creators.
Consider adding a warning log or subtle error indicator for invalid citations:
if (!isNaN(index)) { return <SourceNumberButton index={index} />; } else { - // citation is not looked up yet, don't render anything - return <></>; + console.warn(`Invalid citation index: ${children[0]}`); + return <span title="Invalid citation" style={{ color: 'red' }}>❗</span>; }🧰 Tools
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[error] 115-115: Change to an optional chain.
Unsafe fix: Change to an optional chain.
(lint/complexity/useOptionalChain)
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📒 Files selected for processing (2)
- templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (4 hunks)
- templates/types/streaming/nextjs/app/components/ui/chat/chat-message/markdown.tsx (1 hunks)
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templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (1)
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templates/**: For files under thetemplatesfolder, do not report 'Missing Dependencies Detected' errors.templates/types/streaming/nextjs/app/components/ui/chat/chat-message/markdown.tsx (1)
Pattern
templates/**: For files under thetemplatesfolder, do not report 'Missing Dependencies Detected' errors.
🔇 Additional comments (5)
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/codeblock.tsx (3)
13-13: LGTM! Good addition for component flexibility.Adding an optional
classNameprop enhances the reusability and customization options for theCodeBlockcomponent.
56-56: LGTM! Component signature updated correctly.The
CodeBlockcomponent signature has been properly updated to include the newclassNameprop, maintaining the use ofmemofor performance optimization.
Line range hint
1-132: Great job on the CodeBlock component refactor!The changes successfully implement the switch from
react-syntax-highlightertohighlight.js, aligning well with the PR objectives of enhancing performance for code block rendering. The implementation is clean, follows React best practices, and includes some performance optimizations.Key improvements:
- Simplified rendering structure using standard HTML tags.
- Efficient use of
useRefanduseEffectfor applying syntax highlighting.- Added flexibility with the new
classNameprop.Consider the minor suggestions provided in the previous comments for further optimization and consistency. Overall, this refactor should significantly improve the performance of code rendering in the application.
templates/types/streaming/nextjs/app/components/ui/chat/chat-message/markdown.tsx (2)
117-117: LGTM: Improved CodeBlock stylingThe addition of the "mb-2" class to the CodeBlock component is a good styling improvement. It likely adds a bottom margin, which should enhance the visual separation between code blocks and surrounding content.
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1-153: Overall assessment: Good improvements with minor enhancement suggestionThe changes in this file are well-implemented and improve both the styling of code blocks and the handling of citation links. These modifications align with the PR's objective of enhancing performance, although their direct impact on performance might be minimal.
The code adheres to the provided coding guidelines, and no major issues were found. The suggestion for improving invalid citation handling is a minor enhancement that could further improve the user experience and debugging process.
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[error] 115-115: Change to an optional chain.
Unsafe fix: Change to an optional chain.
(lint/complexity/useOptionalChain)
Currently, asking AI for generating inline code will make browser tag so lag.
The root cause is may because react-syntax-highlight re-render too many times.
Summary by CodeRabbit
New Features
highlight.js.Bug Fixes