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How to Fix TSX Errors - Step by Step Guide

Step 1

Paste Your Broken TSX / TypeScript React Code

Got broken TSX that's causing syntax errors in your TypeScript React app? Let's fix it! After fixing, use our TSX validator, TSX formatter, or convert TSX to JSX. Paste your problematic TSX code:

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Paste broken TSX: Copy error-prone code from your TypeScript React components, type annotations, and interfaces

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Fix common errors: Automatically repairs interface syntax, className issues, event handler types, and unclosed tags

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Try sample TSX: Click "Sample" to load broken TSX and see the tool in action

Note: For very large TSX files, the server may not be able to handle the processing. Please use smaller TSX chunks for best results.

Example: Common TSX Errors

Here are typical TSX syntax errors that break TypeScript React components:

interface UserProps {
  name string
  email string
  age: number
}

function UserCard({ name, email, age }: UserProps) {
  return (
    <div class="card">
      <img src="avatar.png">
      <h2>{name}</h2>
      <p>{email}</p>
      <button onclick={(e) => handleClick(e)}>
        Save
      </button>
    </div>
    <div class="footer">
      <span>Age: {age}</span>
    </div>
  )
}
Step 2

Review Error Detection

The tool automatically scans your TSX and identifies all syntax errors with precise locations and descriptions:

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Error highlighting: See exactly where each syntax error occurs in your TSX code

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Detailed descriptions: Get clear explanations of what's wrong and how to fix each TypeScript and JSX issue

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Line numbers: Pinpoint exact locations of errors for easy identification

Most Common TSX Errors and How to Fix Them

1. Missing Colon in Interface Property

TypeScript interface properties require a colon between the property name and its type.

❌ Wrong:

interface Props { email string }

✅ Correct:

interface Props { email: string }
2. Using class Instead of className

Just like JSX, TSX requires className for CSS classes since class is a reserved word.

❌ Wrong:

<div class="container">

✅ Correct:

<div className="container">
3. Incorrect Event Handler Types

TypeScript requires proper event types like React.FormEvent and React.ChangeEvent.

❌ Wrong:

const handleSubmit = (e) => { e.preventDefault() }

✅ Correct:

const handleSubmit = (e: React.FormEvent<HTMLFormElement>) => { e.preventDefault() }
4. Unclosed JSX Tags

Void HTML elements like img, input, and br must be self-closed in TSX.

❌ Wrong:

<img src="photo.png"> <input type="text">

✅ Correct:

<img src="photo.png" /> <input type="text" />
Step 3

Apply Fixes and Validate

Use the auto-fix feature to correct errors, then validate your fixed TSX:

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Auto-fix: Automatically correct common errors like interface syntax, className, event handler types, and self-closing tags

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Validation: Confirm your TSX is now valid and ready to use in your TypeScript React project

Best Practices for Writing TSX

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Define Props Interfaces Explicitly:

Always define TypeScript interfaces for your component props. This provides type safety and better IDE autocompletion. Learn more about TypeScript object types.

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Use React.FC Sparingly:

Prefer plain function declarations with typed props over React.FC. See the React TypeScript Cheatsheet for recommended patterns.

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Enable Strict Mode in tsconfig:

Set "strict": true in your tsconfig.json to catch more potential errors at compile time, including null checks and implicit any types.

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Use ESLint with typescript-eslint:

Catch TSX errors early by using typescript-eslint in your project. It enforces TypeScript and JSX best practices and catches common mistakes.

Frequently Asked Questions

What is TSX?

TSX is the TypeScript version of JSX. It allows you to write HTML-like markup inside TypeScript files with full type safety. TSX files use the .tsx extension and combine React's JSX syntax with TypeScript's type system for more robust component development.

How do I fix broken TSX online?

Simply paste your broken TSX code into the editor above, and the tool will automatically detect syntax errors like missing colons in interfaces, incorrect className usage, wrong event handler types, and unclosed tags. Click the fix button to apply corrections instantly.

Can the fixer handle Next.js and React Native TSX?

Yes! The TSX fixer works with any TSX syntax regardless of the framework. It handles Next.js pages, React Native components, and standard TypeScript React components. The tool focuses on TSX syntax correction, which is universal across all TypeScript React-based frameworks.

What TSX errors can this fixer repair?

The fixer handles common issues like missing colons in interface properties, class to className conversion, incorrect event handler types (React.FormEvent, React.ChangeEvent), unclosed self-closing tags, missing fragment wrappers, and other common TypeScript JSX syntax mistakes.

Is the TSX fixer free to use?

Yes, completely free with unlimited usage and no registration required. Fix as many TSX files as needed with full error detection and auto-correction features at no cost.

Can I convert my fixed TSX to other formats?

Absolutely! After fixing your TSX, you can use our TSX to JSX converter to remove TypeScript types, the TSX to HTML converter for static markup, or the TSX formatter to clean up your code style.

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