Check error types in Typescript

typescript
Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking

Install this rule for wispbit

Add this rule to wispbit and it will run when you open a pull request

Install this rule for Coderabbit

Copy the configuration below and add it to your repository as .coderabbit.yml in your project root.

reviews:
  path_instructions:
    - path: "*.ts"
      instructions: |
                
        Always check the error type in catch blocks and handle specific error types explicitly.
        
        Bad:
        
        ```typescript
        try {
          // Some operation
        } catch (error) {
          // Converting all errors to a specific type without checking
          throw new CredentialNotFoundError(id, type)
        }
        ```
        
        Good:
        
        ```typescript
        try {
          // Some operation
        } catch (error) {
          // Check specific error type first
          if (error instanceof EntityNotFoundError) {
            throw new CredentialNotFoundError(id, type)
          }
        
          // Pass through other errors
          throw error
        }
        ```

Install this rule for Greptile

Greptile rules can be added through the web interface. Please see this documentation for details on how to add custom rules and context.

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

File Path Patterns:

*.ts

Install this rule for GitHub Copilot

Copilot instructions can be added through the interface. See the documentation for details on how to create coding guidelines.

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

File Path Patterns:

*.ts

Install this rule for Graphite Diamond

Diamond custom rules can be added through the interface. See the documentation for details on how to create custom rules.

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

File Path Patterns:

*.ts

Use with Cline

Copy the rule below and ask Cline to review your code using this rule

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

Use with OpenAI Codex

Copy the rule below and ask OpenAI Codex to review your code using this rule

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

Use with Cursor

Copy the rule below and ask Cursor to review your code using this rule

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

Use with Claude Code

Copy the rule below and ask Claude Code to review your code using this rule

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```

Install this rule for Windsurf

To set up rules for Windsurf Reviews, please see this documentation 

Always check the error type in catch blocks and handle specific error types explicitly.
Bad:
```typescript
try {
  // Some operation
} catch (error) {
  // Converting all errors to a specific type without checking
  throw new CredentialNotFoundError(id, type)
}
```
Good:
```typescript
try {
  // Some operation
} catch (error) {
  // Check specific error type first
  if (error instanceof EntityNotFoundError) {
    throw new CredentialNotFoundError(id, type)
  }
  // Pass through other errors
  throw error
}
```