Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user’s experience. For more help http://xhr.spec.whatwg.org/
ການນຳໃຊ້ Synchronous XMLHttpRequest ໃນ thread ຫລັກໄດ້ຖືກຍົກເລີກນຳໃຊ້ແລ້ວເພາະວ່າມັນກໍ່ໃຫ້ເກີດຜົນກະທົບຮ້າຍແຮງຕໍ່ການໃຊ້ງານຂອງຜູ້ໃຊ້. ຂໍ້ມູນເພີ່ມເຕີມ http://xhr.spec.whatwg.org/