Ukukhishwa okusha kwenjini ye-elk 2.0.9 JavaScript kuyatholakala, okuhloswe ngayo ukusetshenziswa kumasistimu anezisetshenziswa ezifana nama-microcontroller, okuhlanganisa amabhodi e-ESP32 ne-Arduino Nano ane-2KB RAM kanye ne-30KB Flash. Ukuze usebenzise umshini we-virtual onikeziwe, amabhayithi angu-100 enkumbulo kanye no-20 KB wesikhala sokugcina kwanele. Ikhodi yephrojekthi ibhalwe ngolimi C futhi isatshalaliswa ngaphansi kwelayisensi ye-GPLv2. Ukwakha iphrojekthi, i-compiler C yanele - akukho ukuncika okwengeziwe okusetshenziswayo. Iphrojekthi ithuthukiswa abathuthukisi besistimu yokusebenza yamadivayisi e-IoT i-Mongoose OS, injini ye-JavaScript ye-mJS kanye neseva yewebhu ye-Mongoose eshumekiwe (esetshenziswa emikhiqizweni evela ezinkampanini ezifana ne-Siemens, i-Schneider Electric, i-Broadcom, i-Bosch, i-Google, i-Samsung ne-Qualcomm ).
Inhloso enkulu ye-Elk ukudala i-firmware yama-microcontrollers ku-JavaScript enza imisebenzi ehlukahlukene ezenzakalelayo. Injini futhi ilungele ukushumeka izibambi ze-JavaScript ezinhlelweni ze-C/C++. Ukuze usebenzise injini kukhodi yakho, vele ubeke ifayela le-elk.c esihlahleni somthombo, faka ifayela lesihloko se-elk.h futhi usebenzise ikholi ethi js_eval. Kuvunyelwe ukushayela imisebenzi echazwe ngekhodi ye-C/C++ kusuka kumaskripthi e-JavaScript, futhi ngokuphambene nalokho. Ikhodi ye-JavaScript isetshenziswa endaweni evikelekile ehlukanisiwe nekhodi eyinhloko kusetshenziswa umhumushi ongakhiqizi i-bytecode futhi ongasebenzisi ukwabiwa kwememori okuguquguqukayo.
I-Elk isebenzisa isethi encane yokucaciswa kwe-Ecmascript 6, kodwa eyanele ekudaleni izikripthi ezisebenzayo. Ikakhulukazi, isekela isethi eyisisekelo yama-opharetha nezinhlobo, kodwa ayisekeli ama-arrays, ama-prototypes, lokhu, okusha, nokususa izinkulumo. Kuhlongozwa ukuthi kusetshenziswe i-let esikhundleni se-var and const, futhi ngenkathi esikhundleni sokwenza, shintsha futhi. Awukho umtapo wolwazi ojwayelekile onikeziwe, isb. azikho izinto ezinjalo ze-Date, Regexp, Function, String kanye neNombolo.
Source: opennet.ru