Interface ValidationResult

Example

// Validating user input
function validateFileUpload(file: File): ValidationResult {
  const errors: string[] = [];
  const warnings: string[] = [];

  // Check file size
  if (file.size > 100 * 1024 * 1024) {
    errors.push('File size exceeds 100MB limit');
  } else if (file.size > 50 * 1024 * 1024) {
    warnings.push('Large file may take time to upload');
  }

  // Check file type
  if (!file.type.startsWith('image/')) {
    errors.push('Only image files are allowed');
  }

  return {
    valid: errors.length === 0,
    errors,
    warnings
  };
}

// Using validation result
const result = validateFileUpload(file);
if (!result.valid) {
  console.error('Validation failed:', result.errors.join(', '));
} else {
  if (result.warnings.length > 0) {
    console.warn('Warnings:', result.warnings.join(', '));
  }
  // Proceed with upload
}
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