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is-implemented.js 247 B

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  1. 'use strict';
  2. module.exports = function () {
  3. var isSafeInteger = Number.isSafeInteger;
  4. if (typeof isSafeInteger !== 'function') return false;
  5. return !isSafeInteger('23') && isSafeInteger(34232322323) &&
  6. !isSafeInteger(9007199254740992);
  7. };