Yintoni JavaScripts? imisebenzi esisiseko JavaScript

Web-izikripthi iinkqubo ebhalwe ngqo kwi HTML-ikhowudi okanye nje iifayile, leyo uyakukhetha ngakumbi. Ezi nkqubo abhalwe JavaScript. Ngaloo ndlela, ngaphandle nje kokuba Javascripts ezinjalo, singatsho ukuba ulwimi lokuprograma oko kukuthi ngentetho evakalayo.

Javascript olufundwa ngumkhangeli, uze usebenzise amazwi abhalwe, nokulawula, ezo ibekwe ngaphezu page. JavaScript kwi kwezivakalisi yakho iyafana lwimi iinkqubo ezifana Java, C ++ na C.

JavaScript ufumbethe inkangeleko yalo kuphuhliso iinkampani ezifana Sun Microsystems (Oracle) kunye Netscape (Mozilla). Igama lokuqala ulwimi LiveScript. Noko ke, ngenxa yokuba ngelo xesha kwakukho ethandwa kakhulu Java ulwimi evela kwinkampani Sun Microsystems, isebe ukuthengisa inkampani Netscape kaThixo, kwagqitywa ekubeni ukutshintsha igama ulwimi kwi JavaScript. Xa oku Kuye kwabikwa ukuba eli nyathelo wongezelela ulwimi ethandwayo. Kwakhona, ngaphandle nje kokuba Javascripts ezinjalo, kufuneka kuqatshelwe ukuba Java ne JavaScriptName ziilwimi ezimbini ezahlukeneyo.

ECMA-262 lolusezantsi ezisemthethweni lwimi. Igama ulwimi JavaScript - ECMAScript.

Kuba ukufunda eli ulwimi uya kuba nolwazi lwangaphambili luncedo malunga CSS kunye Html. Ukuba ngaphambi kokuba lo mzuzu awuyazi malunga CSS kunye Html, oko kufuneka kwangoko eziqhelekileyo.

Izithintelo kunye namakhono JavaScript

Ezi mpawu zilandelayo kuvela kwi sicelo kwi web-amaphepha leempendulo [isuswe]:

• Ukongeza iintlobo yeziphumo oopopayi, nto leyo ndaqonda ngokusebenzisa Html kunye CSS.
• Wakho ukutshintsha Html izinto umxholo kunye nokongeza ithegi entsha ngaphandle ukulayisha ikhasi.
• Xa isiganeko (ngelokuphendula izimvo umsebenzisi) - processing of amaqhosha kwi yezitshixo kunye isalathisi se mouse.
• Ukuphunyezwa kwezi iitsheki, ezangeniswa kwimihlaba ifom phambi kokuthumela kwi umncedisi. Oku kunciphisa umthwalo kumncedisi kwaye ikhawulezisa isiza umsebenzi.
• Ukumisela nenguqulo ibrawuza ukulayisha iphepha olufunayo ngokusekelwe oku.

Olu ayilo luhlu olupheleleyo scripting izakhono, ethe ezibhaliweyo kule lwimi, imisebenzi JavaScript zinentsingiselo ebanzi kakhulu.

Ukongeza kwezi mpawu, kukho imida yokusetyenziswa meko:

• Akukho ukufikelela kwi iifayile zibekwe kwi computer lomsebenzisi. Ngokubanzi, musa ukuba ukufikelela ngaphandle iphepha le web le ngokwayo. Ngaphandle sisenokuba kukuphela cookie ezinokufundwa kwaye kubhalwa kunye JavaScript. Iinjongo zale hlobo zidla iyafuneka kuphela ukulayisha ikhasi ngokukhawuleza.
• Akukho kungenzeka na imibuzo site emnqamlezweni, okt ukuzuza ukufikelela amaphepha Web eziphezu domain ezahlukeneyo, kwanokuba xa uvula i tabs ezikufutshane.
• Akukho ndlela ukuvala i tabs kunye aneefestile zavuleka nayo.
• Akukho amathuba ukukhusela umbhalo wokuqala kwiphepha kunye nokuthintelwa ukuba ukukhuphela imifanekiso okanye okubhaliweyo ukusuka kwi phepha. Oku kushiya kungenzeka ukongeza ezinye nezithintelo ezivumela imisebenzi JavaScript.

izithintelo abanjalo kwezinye iindlela kunzima ukuphumeza ikhowudi ngolunya.

Yintoni Javascripts?

Njengoko sele kutshiwo ngentla apha, JavaScript - ulwimi enika interactivity ukuya kumaphepha e web. Ngoncedo yale iilwimi izicelo zifakiwe kwi-Html-khowudi. Umzekelo, kwifomu yokubhalisa okanye lemibuzo uzalise ngumsebenzisi. JavaScript badla zabhidaniseka Java, kodwa phakathi kwezi lwimi encinane eqhelekileyo.

Abanye bade thelekisa nabanye ulwimi JavaScript Ruby, Self, Python. Kodwa ke ulwimi eyahlukileyo.

ukusebenzisa JavaScript

Usebenzisa JavaScript, ungenza utshintsho kwiphepha, ukutshintsha izinto kwesimbo, dibanisa okanye ukususa tags. Kwakhona kuyenzeka ukuba bafunde ngezenzo yomsebenzisi wayo kwiphepha (ukuhla okanye ukwandisa indawo yokusebenza ye kwekhusi, ecofa nge mouse, cinezela naziphi na izitshixo, kwiphepha ebonakalayo). Kuyenzeka ukuba lokufikelela nakoluphi na element Html-ikhowudi nokwenza izinto kunye nesiqalelo. Ngoko ke, impendulo yombuzo "Yintoni na JavaScripts?» Uya kuba nethuba ukukhuphela idatha ngaphandle ukulayisha ikhasi, imiyalezo igalelo, isimo sentlalo okanye ukufunda cookie kunye nokwenza ezinye izinto ezininzi.

Isiseko yokukhetheka JavaScript

Eyona ukuziqambela iphambili yale ulwimi ukuba unalo inkxaso phantse zonke iibrawuza kwaye umanyano ngokupheleleyo nabo. Zonke izenzo e JavaScript zilula kakhulu. Akukho enye technology esihlala zonke izibonelelo ezinjalo. Umzekelo, akukho cross-browser, abayi zixhaswa kuzo zonke izikhangeli (oko xul, ActiveX, VBScript). Kwakhona, kukho abo musa ukuhlanganiswa ngokupheleleyo kwibhrawuza. It Silverlight, Flash, Java. Okwangoku kukho uphuhliso kakhulu obu bugcisa, yaye izinto JavaScript ziyaphuhliswa 2.

iilwimi Alternative programmmirovaniya

Oko JavaScript ulinganiselwe. Kulo mzekelo, iya kunceda lwimi zilandelayo kweenkqubo.

Java

Ulwimi lusetyenziswa - Java. Ngoncedo ulwimi zichazwa ubuchule ezintsonkothileyo, kodwa akusoloko efunekayo kwi-website oluqhelekileyo. Ngenxa yesi sizathu, ixesha elide ukukhuphela java-applet`y abe nemali eninzi.

Flash

Ukususela ekuqaleni, ulwimi Flash yenzelwe njenge cross-brazuerny nokudala izinto multimedia. Umzekelo, ukudala iindawo interactive intanethi, imidlalo, iibhanile, abadlali komsindo nevidiyo. Phakathi kwezinye izinto, esebenzisa Flash ukudala umngxuma (uqhagamshelo yenethiwekhi), unako ukusebenza kunye namajelo eendaba, ukugcina izinto akukho mfuneko ukuthumela izicelo kumncedisi. Kukho izixhobo lula lomzobo uphuhliso Flash.

Xa sithelekisa iintsilelo Flash kunye JavaScript, zeziphi izinto zahluke kakhulu, elibi iphambili flash nezikhokelo wayo ombi iinjini zokuphendla. Oku kungenxa yokuba iinjini zokuphendla baye links Html. Kwakhona akukho uyakwazi ukukhetha ubhalo Flash kwisikhongozeli.

Silverlight, Vbscript, JavaFX, xul

Ukuncedisana izakhono JavaScript xa ukwakha ujongano kunye nonxibelelwano, ukusetyenziswa kobugcisa Silverlight, Vbscript, JavaFX, xul.
Zisetyenziswa kakhulu kunqabile cwaka kwe Flash kunye JavaScript. Ukuqaqambisa iimpawu nganye kuwo bathi oku kulandelayo:

- xul - ezisetyenziswa inkcazelo izicelo desktop kunye interfaces. Kodwa kunokwenzeka kuphela xa inkqubo yi Mozilla.

- JavaFX - isebenza kuphela kwi khompyutha kunye Java, kuba ukongeza kulwimi.

- Vbscript - siqulunqwe Microsoft. Waba njengesiseko Visual Basic. Olu lwimi akuthethi ukuphuhlisa nangayiphi na indlela, kule mihla sele alufane lusetyenziswe, kuxhomekeka isivuno JavaScript.

Silverlight - siqulunqwe Microsoft njenge okhuphisana Flash. Kwakhona akanawo ithandwa kakhulu ukusukela strings JavaScript uyakwazi ukunikeza okungaphezu kokuba script page.

Indlela ukwenza JavaScript noko imposiso JavaScript

Ngoku kuyimfuneko ukuxoxa iingxaki zemihla ngemihla lwabasebenzisi kwi-network. Namhlanje, yaye kuya kusanda ngokwanda ukuba kuyenzeka ukuba umsebenzisi emva ngokundwendwela iphepha yakhe kwezentlalo. network ubona kwi window eliphezulu umyalezo wemposiso "JavaScript ayinikiwe", "Kuba ukusebenza ngokufanelekileyo site ukuba JavaScript», «JavaScript Imposiso». Indlela yokulungisa ngayo - into ebaluleke kakhulu, ngenxa yokuba xa kukho ubunzima kunye kulayishwa ividiyo nefoto umsebenzisi.

Ndiyenza njani JavaScript e Mozilla Firefox

Ukuba umsebenzisi usebenza kwi Mozilla, kufuneka uye kwi "Tools", emva koko uye "Settings". Ngoko, kwi tab "Contents" kufuneka uX kwibhokisi ephawulwe "Sebenzisa JavaScript".

Njengoko JavaScript ifakiwe Google Chrom

Ukwenza okanye ukukhubaza JavaScript isikhangeli Le nkqubo ilandelayo kufuneka :. "Ukumisela nokulawula Google Chrom", "Izicwangciso", "Advanced", "data Personal (ukumisela imixholo)", "JavaScript" Vumela zonke iziza ukuba usebenzise JavaScript (kucetyiswa).

Ndiyenza njani JavaScript Opera

Ukwenza okanye ukukhubaza JavaScript isikhangeli luyafuneka ukwenza oku kulandelayo:

- Cofa iqhosha F12.

- Khetha ukhetho 'Yenza JavaScript ".

Njengoko JavaScript ifakwe kwi-IE ( "Internet Explorer")

Ukwenza okanye ukukhubaza JavaScript "Internet Explorer", ufuna ukwenza oku kulandelayo: "Tools", "Ukhetho Lwe-intanethi", "Ukhuseleko" tab, "Khetha indawo intanethi", "Custom Level" iqhosha, khetha "imiboniso", "Vumela zeempendulo."

JavaScript VC

Uthandwa kakhulu kwi ico womnatha lwentlalo "VKontakte" qho kuveza izimanga. Iya isanda, abasebenzisi "VKontakte" akhalaze malunga nokungakwazi ukumamela odiyo, okanye ukungakwazi ukujonga ividiyo.

Ukusombulula le ngxaki ifuna JavaScript Imposiso ulungiso kwi-network "VKontakte".

Yintoni JavaScript VK impazamo?

Umsebenzisi watyelela iphepha kwi-network yentlalo wazama ukuqala ividiyo okanye ifayile audio, kodwa emva koko efumaneka kwikona ephezulu ekhohlo mbhalo «JavaScript Imposiso: initAddMedia abakacaci». Lo myalezo livela xa imposiso
«[Esusiwe] initAddMedia».

Iindlela zokusombulula le ngxaki kunye imposiso kwi womnatha ekuhlaleni "VKontakte":

- Okokuqala, ufuna ukuya "Qala," "iKhompyutha Yam 'ncwadi eneenkcukacha kunye Windows. Koko sinokufikelela icandelo kwi umqhubi eneenkcukacha system32. Ke kule folda njl

- Embindini kukho inani elincinane lweefayili kwifowulda ufuna ukukhetha ifayile wemikhosi.
Ngoko lwefayile kuvulwa usebenzisa i "Notepad". Kubonakala ngathi le nto: on iinginginya ifayile kufuneka cinezela iqhosha lemouse ekunene kwaye ukhetha "Vula nge." Ngoko ungakhetha i "Text Editor WordPad».

Emva kokuvula i-wefayile ofuna ukuba bajonge ifayile irekhodi 127.0.0.1 lwenginginya yobulali. Naziphi na ezinye amangenelo akufuneki Wanciphisa kuphela kwaye ukuvala ukusebenza ezinzileyo iifayile ezirekhodiweyo neevidiyo. Kuyimfuneko ukuba ukususa ngokupheleleyo yonke ingcaciso evela ifayile uze ukope kuphela udibaniselana mazwi 127.0.0.1. Okulandelayo, kufuneka klikha u- "Save" uze uqalise kwakhona ikhompyutha yakho. Xa "VKontakte" page sibabuyela yonke zizakusebenza kakuhle.