5 Akawanda Makanganiso Akawanda Akagadzirwa neJavaScript Vagadziri

Javascript Kubudirira

JavaScript ndiyo mutauro wepasi kungangoita ese mazuva ano webhu kunyorera. Mumakore mashoma apfuura, takaona kuwedzera kwehuwandu huwandu hwesimba reJavaScript-raibhurari uye masisitimu mukuvaka webhu kunyorera. Izvi zvakashanda kune Imwe Peji Zvikumbiro pamwe ne server-parutivi JavaScript mapuratifomu. JavaScript yakanyatso kwese kwese munyika yekuvandudza webhu. Ichi chikonzero nei iri hukuru hunyanzvi hunofanirwa kuve nehunyanzvi nevekugadzira webhu.

JavaScript inogona kutaridzika kunge yakapusa mukutarisa kwekutanga. Kunyangwe kuvaka kwekutanga JavaScript inoshanda iri nyore uye yakatwasuka maitiro kune chero munhu, kunyangwe kana munhu wacho ari mutsva zvachose kuJavaScript. Asi mutauro uchiri wakaomarara uye une simba kupfuura zvataizodaira kutenda. Unogona kudzidza zvinhu zvakawanda mumakirasi eJavaScript na ECMAScript 2015. Izvi zvinobatsira mukunyora inonakidza kodhi uye zvakare inotaurisa nyaya dzenhaka. Izvi zvinhu zvakapusa zvinogona kutungamira kuzvinhu zvakaoma dzimwe nguva. Ngatikurukurei mamwe ematambudziko akajairika.

  1. Block-chikamu chiyero - Imwe yeakajairika kusanzwisisana pakati pevagadziri veJavaScript kufunga kuti inopa chiyero chitsva chebhuku rega rega. Izvi zvinogona kuve zvechokwadi kune mimwe mitauro yakati wandei, asi zvisiri zvechokwadi zvachose kuJavaScript. Kunyangwe block-level zviyero zviri kuwana kumwe kutsigirwa nenzira yemazwi matsva ayo anozobata mazwi akakosha muECMAScript 6.
  2. Ndangariro Kudonha - Kana iwe usiri kunyatsoteerera zvakakwana, ndangariro inodonhedza chimwe chinhu chisingadziviririke uchinyorera JavaScript. Kune nzira dzakawanda umo kuyeuka kwendangariro kunogona kuitika. Imwe huru yekurangarira inodonha inoitika kana iwe uine zvakasununguka mareferenzi kuzvinhu zvisina basa. Yechipiri ndangariro inodonha yaizoitika kana paine chirevo chedenderedzwa. Asi pane nzira dzekudzivirira uku kuyeuka kwendangariro. Mhando dzepasi rose uye zvinhu zviri mune yazvino kufona stack zvinozivikanwa semidzi uye zvinowanikwa. Ivo vanochengetwa mundangariro kwenguva yakareba sezvavanogona kuwanikwa nyore kubva kumidzi vachishandisa referensi.
  3. Kubata kweDOM - Unogona kubata DOM zviri nyore muJavaScript, asi hapana nzira iyo izvi zvingaitwe nemazvo. Kuwedzerwa kwechinhu cheDOM kukodhi inzira inodhura. Iyo kodhi iyo inoshandiswa kuwedzera akawanda maDOM haina kushanda zvakakwana uye nekudaro haizoshanda nemazvo. Apa ndipo paunogona kushandisa zvidimbu zvemagwaro zvinogona kubatsira mukuvandudza zvese kushanda pamwe nekuita.
  4. Referencing - Iwo macoding matekiniki uye dhizaini dhizaini yeJavaScript yakafambira mberi mumakore mashoma apfuura. Izvi zvakakonzera kuwedzera mukukura kwenzvimbo dzekuzvimiririra. Aya zviyero ndizvo zvakajairika chikonzero chekuvhiringidzika kwe ichi / icho. Mhinduro inoenderana yedambudziko iri ndeyekuchengetedza yako mareferensi se ichi mune musiyano.
  5. Yakasimba Mode - Iyo Strict Mode inzira iyo iko kukanganisa kubata pane yako JavaScript nguva yekumhanyisa kunoitwa yakasimba uye izvi zvinoita kuti inyatso chengeteka. Iko kushandiswa kweStrict Mode kwave kugamuchirwa kwakawanda uye kunoitwa kufarirwa. Kuregererwa kwayo kunoonekwa seyakaipa poindi. Iwo mabhenefiti makuru eiyo solid mode ari nyore kugadzirisa dambudziko, netsaona maglobal aka dzivirirwa, akadzokorora mazita epfuma akarambwa nezvimwe.
  6. Subclass Nyaya - Kuti ugadzire kirasi muchikamu chepasi cheimwe kirasi, iwe unozofanirwa kushandisa iyo inowedzera kiyi. Iwe uchafanirwa kutanga kushandisa super (), kana nzira yekuvaka yakashandiswa muchikamu chepasi. Izvi zvichaitwa usati washandisa ichi kiyi. Kana izvi zvikasaitwa, kodhi yacho haishande. Kana iwe uchiramba uchibvumira JavaScript makirasi kuwedzera zvinhu zvakajairika, iwe unoramba uchitsvaga zvikanganiso.

Putira

Panyaya yeJavaScript uye zvakafanana chero mumwe mutauro, paunowedzera kuedza kunzwisisa kuti inoshanda sei uye kuti haishande sei, zvichave nyore kwauri kuti iwe ugadzire kodhi yakasimba. Izvi zvinokutendera iwe kutora mukana wakakodzera wemutauro. Kushaikwa kwekunzwisisa kwakakodzera ndipo panotangira dambudziko. Iwo makirasi eES6 eJavaScript anokupa iwe matipi ekugadzira kodhi inotarisana nechinhu.

Kana iwe usinganzwisise zvakajeka madiki madiki uye anotendeuka mukodhi, iwe unozopedzisira uine zviputi mune yako application. Kana iwe uine kusahadzika, iwe unogona kubvunza kune vamwe yakazara-stack webhu vanogadzira.

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