ECMAScript 2025 Syntax Sugar Guide#

function processResponse(response) {
  if (response.status === 200 && response.data) {
    return { success: true, data: response.data };
  } else if (response.status === 404) {
    return { success: false, error: 'Not found' };
  } else if (response.status >= 500) {
    return { success: false, error: 'Server error' };
  } else {
    return { success: false, error: 'Unknown error' };
  }
}

function processResponse(response) {
  return match (response) {
    when ({ status: 200, data }) -> ({ success: true, data })
    when ({ status: 404 }) -> ({ success: false, error: 'Not found' })
    when ({ status: status if status >= 500 }) -> ({ success: false, error: 'Server error' })
    default -> ({ success: false, error: 'Unknown error' })
  };
}

function handleArray(arr) {
  return match (arr) {
    when ([]) -> "Empty array"
    when ([first]) -> `Only one element: ${first}`
    when ([first, second]) -> `Two elements: ${first}, ${second}`
    when ([first, ...rest]) -> `First element: ${first}, others: ${rest.length} items`
  };
}