Function isInStrictMode

lib/internal/repl/utils.js:290–299

(repl)

  }

  function isInStrictMode(repl) {
    return repl.replMode === REPL_MODE_STRICT || ArrayPrototypeIncludes(
      ArrayPrototypeMap(process.execArgv,
                        (e) => StringPrototypeReplaceAll(
                          StringPrototypeToLowerCase(e),
                          '_',
                          '-',
                        )),
      '--use-strict');
  }

  // This returns a code preview for arbitrary input code.
  function getInputPreview(input, callback) {