es6.object.prevent-extensions.js

// 19.1.2.15 Object.preventExtensions(O)
var isObject = require('./_is-object')
  , meta     = require('./_meta').onFreeze;

require('./_object-sap')('preventExtensions', function($preventExtensions){
  return function preventExtensions(it){
    return $preventExtensions && isObject(it) ? $preventExtensions(meta(it)) : it;
  };
});