JS: snake_case and pascalCase to "Title Case"

index.js

const toTanginaMoCase = (str: string): string => {
  // Convert snake case to title case
  return str.split('_')
    .map(str => str.charAt(0).toUpperCase() + str.substr(1))
    .join('')
    .replace(/([A-Z])/g, ' $1')
    .trim()
}