eslint-rule-benchmark/dist/core/utilities/get-file-extension.js

Benchmark ESLint rules with detailed performance metrics for CI and plugin development

function getFileExtension(filename) {
  let lastDotIndex = filename.lastIndexOf('.')
  if (lastDotIndex <= 0) {
    return ''
  }
  let extension = filename.slice(lastDotIndex + 1)
  return extension.length > 0 ? extension : ''
}
export { getFileExtension }