Babu amsa daya-daya ga wannan tambayar, saboda babbar matsalar da ka iya alaka da amfani da JavaScript a cikin masarrafar wayar hannu za ta bambanta dangane da na'urar da kake amfani da ita. Koyaya, wasu matsalolin gama gari waɗanda zasu iya faruwa yayin amfani da JavaScript akan na'urar hannu sun haɗa da aiki a hankali da wahalar samun wasu fasalulluka na burauzar gidan yanar gizo.
if (navigator.userAgent.match(/Android/i)
|| navigator.userAgent.match(/webOS/i)
|| navigator.userAgent.match(/iPhone/i)
|| navigator.userAgent.match(/iPad/i)
|| navigator.userAgent.match(/iPod/i)
|| navigator.userAgent.match(/BlackBerry/)
|| navigator.userAgent.match(/Windows Phone/)
){
// some code..
}
Lambar tana duba idan mai amfani yana kan na'urar Android, na'urar webOS, iPhone, iPad, iPod, BlackBerry, ko Windows Phone. Idan mai amfani yana kan ɗayan waɗannan na'urori, lambar za ta yi aiki.
Gano mai lilo
Gano mai lilo a cikin JavaScript batu ne mai wahala. Masu bincike daban-daban suna da iyakoki daban-daban, don haka yana da wahala a ƙirƙira algorithm gano abubuwan duniya.
Hanya ɗaya ita ce amfani da dabarun gano fasalin. Misali, zaku iya bincika gaban samfurin abu na takarda (DOM) ko abun taga. Koyaya, wannan hanyar ba koyaushe abin dogaro bane saboda masu bincike daban-daban suna aiwatar da waɗannan fasalulluka ta hanyoyi daban-daban.
Wata hanyar ita ce amfani da heuristics. Misali, zaku iya neman takamaiman tags ko kaddarorin HTML. Duk da haka, wannan hanya kuma ba za ta iya zama abin dogaro ba saboda masu bincike daban-daban suna fassara waɗannan tags da kaddarorin ta hanyoyi daban-daban.
A ƙarshe, gano mai bincike a cikin JavaScript aiki ne mai wuyar gaske wanda ke buƙatar tsari da gwaji a hankali.
Idan Loop
Idan madauki nau'in madauki ne wanda ke ba ka damar gwada yanayi da aiwatar da toshe lamba bisa sakamakon.
Idan yanayin gaskiya ne, ana aiwatar da lambar da ke cikin toshe. Idan yanayin karya ne, an tsallake lambar da ke cikin toshe kuma ana ci gaba da aiwatarwa tare da sanarwa ta gaba a cikin bayanin idan.
Misalin da ke gaba yana nuna yadda za a iya amfani da madauki don buga saƙonni daban-daban dangane da ko lamba ta kasance ko da ban mamaki:
lambar lamba = 5; // ƙirƙirar misalin ma'aunin lamba don adana ƙimar lambar mu idan (lambar % 2 == 0) {console.log ("Lambar" + lamba + " ta kasance ko da."); } kuma {console.log("Lambar" + num +" ba ta da kyau."); } // gudanar da lambar a cikin takalmin gyaran kafa mai lanƙwasa don buga saƙonni daban-daban dangane da ko // lambar mu ma ko ba ta da kyau. lamba = 4; // canza darajar mu don madaidaicin lamba ta yadda ba ma lamba ba ce idan (lambar % 2 == 1) {console.log } kuma {console.log ("Lambar" + lamba +" ba ta da kyau."); }
