test006.js

// strict check
//
// append below snippet
//
// var isStrict = false
// try { Object.freeze({}).v = true; } catch (e) { isStrict = true; }
//

function strict() {
  'use strict';
  var isStrict = false;
  try {
    Object.freeze({}).v = true;
  } catch (e) {
    isStrict = true;
  }
  console.log(isStrict);
}

function nonStrict() {
  var isStrict = false;
  try {
    Object.freeze({}).v = true;
  } catch (e) {
    isStrict = true;
  }
  console.log(isStrict);
}

strict();
nonStrict();