Waa maxay JavaScripts? hawlaha aasaasiga ah JavaScript

Web-qabnay jira barnaamijyo in ay diiwaangashan yihiin si toos ah in ka html-code ama in files ah, taas oo ka badan ka fiican. Barnaamijyadan waxay yihiin JavaScript qoran. Sayidka, ka xaqiiqda ah in Javascripts sida, waxaan dhihi karaa in ay tahay luuqadda programming ah oo la micneeyey gooni.

Javascript la akhriyo by browser ah, ka dibna ay maamulaan hadal lagu duubay, oo maareeyaan, kuwaas oo la dhigay ku xusan bogga. JavaScript on your Saan la mid tahay luqadaha barnaamijyada sida Java, C ++ iyo C.

JavaScript leeyahay muuqashadeeduna horumarinta shirkadaha sida Sun Microsystems (Oracle) iyo Netscape (Mozilla). magaca asalka ah ee afka ahaa LiveScript. Si kastaba ha ahaatee, ay sabab u tahay xaqiiqada ah in wakhtigaas ahaa Java ah luqadda aad loo jecel yahay ka shirkad Sun Microsystems, waaxda suuq geynta shirkadda Netscape ee, waxaa la go'aamiyay in la badalo magaca afka ee JavaScript. Marka waxaa lagu xisaabiyaa in tallaabadan ku darayaa afka caan ah. Sidoo kale, xaqiiqada ah marka laga reebo in Javascripts sida, waa in la ogaadaa in Java iyo JavaScript jira laba luqadood oo kala duwan.

ECMA-262 waa heerka rasmiga ah ee afka. Magaca af JavaScript ah - ECMAScript.

Waayo, baarista afka tani waxay noqon doontaa aqoonta ka hor ku saabsan CSS iyo HTML. Haddii ka hor inta la joogo aadan aqoon ku saabsan CSS iyo HTML, waa in ay noqon isla markiiba la yaqaan.

Xadidaada iyo awoodaha JavaScript

Muuqaaladan soo socdaa waxay u muuqdaan in codsiga on the web-pages of script ah [saaro]:

• Ku darista noocyo kala duwan oo saamayn animation, taas oo aan la ogaaday by yahay ee HTML iyo CSS.
• Kartida in la beddelo HTML xubno content iyo ku daray tags cusub oo aan u cabbeyso bogga.
• Wax ka qabashada dhacdo (jawaab u aqbasho user) - nidaaminta, keyboard ku keyboard iyo dulqabo mouse ah.
• Hirgelinta jeegaga, kuwaas oo, kaas oo la soo bandhigay ee beeraha ee foomka ka hor inta dirayaa server ka. Tani waxa ay yaraynaysaa load ku on server iyo dadajiyaa ilaa goobta shaqada.
• Go'aaminta version of browser iyo shuban page la doonayo ku salaysan this.

Tani ma aha liis dhamaystiran oo awoodaha scripting, taas oo la qoray oo ku qoran luqadda this, hawlaha JavaScript leeyihiin macnaha badan ballaaran.

Waxa intaa dheer in muuqaalada kuwan, waxaa jira xadeynta isticmaalka xaaladood:

• Ma jiro helitaanka files in lagu dhejiyay on kombiyuutarka user ee. Guud ahaan, ma helaan meel ka baxsan bogga laftiisa ah. marka laga reebo waxaa laga yaabaa in cookie kaliya in loo akhrin karaa oo la JavaScript qoran. Walxaha noocan ah waxaa sida caadiga ah oo kaliya looga baahan yahay bogga load si dhakhso ah.
• Ma jirto sabab macquul ah weydiimo site cross, ie helo in pages Web in ay yihiin on domain ka duwan, xitaa haddii ay furan oo ku jira tabs ku xeeran yihiin.
• Ma jiro hab in ay xirto ee tabs iyo daaqadaha in la furay la.
• Ma jirto sabab macquul ah ilaalinta qoraaladii asalka ahaa ee bogga iyo mamnuucidda in aad nuqulka images ama text ka bogga. Taasi ayaa ka dhigeysa waxaa macquul ah in aad ku darto qaar ka mid ah xayiraad ogolaada in hawlaha JavaScript.

xayiraad noocan oo kale ah waa in siyaabo qaar ka mid ah ay adag tahay si ay u fuliyaan code xaasidnimo ah.

Waa maxay Javascripts?

Sida aan kor ku xusay, JavaScript - af siinayaa interactivity boggaga web. Iyada oo taageero ka af this waa codsiyada in lagu daraa ku-HTML code. Tusaale ahaan, foom isdiiwaangalin ah ama su'aalo buuxiyaa by user ah. JavaScript waxaa inta badan khaldin Java, laakiin dhexeeya luuqadahan yar ee caadiga ah.

Qaar ka mid ah xitaa barbar luqada JavaScript Ruby kale, Self, Python. Laakiin waa luqad oo kala duwan.

Isticmaalka JavaScript

Isticmaalka JavaScript, isbedel bogga aad ka dhigi kartaa, beddeli waxyaalaha aasaaska ah ee style, ku daro ama wax ka saar tags. Waxa kale oo suuragal in ay bartaan oo ku saabsan tallaabooyinka ay user ee bogga (hoos u dhac ama la kordhiyo aagga shaqo ee shaashadda ah, yeerto leh jiirka, jaraa'id furayaasha kasta, bogga boggan). Waxaa suurto gal ah in ay helaan wax kasta oo element HTML-code iyo khalkhalgelinta la element this. Sayidka, jawaabta su'aasha "Waa maxay JavaScripts?» Noqon doonaa fursad ay ku soo bixi xogta aan u cabbeyso bogga, fariimaha la gelin, dejinta ama akhriska cookie oo uu ku sameeyo ficilada kale oo badan.

The salaysan aqonsado ee JavaScript

asalnimada ugu weyn ee luqadda this waa in uu leeyahay taageerada ku dhowaad dhammaan daalacashada iyo leedahay is dhexgalka ka buuxsada iyaga la. Dhammaan tallaabooyinka in JavaScript waa mid aad u fudud. Ma jiro technology kale oo caawinaysa dadka oo dhan faa'iidooyinkan oo kale. Tusaale ahaan, ma jiraan wax cross-browser, ay ma taageersana in dhammaan daalacashada (waa xul, ActiveX, VBScript). Sidoo kale, waxaa jira kuwa aan si buuxda u dhexgalaan la browser ah. Waxaa Silverlight, Flash, Java. Waqtigan xaadirka ah waxaa jira horumarka weyn ee technology this, iyo xubno ka JavaScript ayaa la horumariyey 2.

luqadaha Alternative programmmirovaniya

Waa in JavaScript waa xaddidan. Xaaladdan oo kale, kaa caawin doona luqadaha barnaamijyada soo socda.

Java

The luqadda ugu used - Java. Iyada oo taageero ka afka ku tilmaamay by algorithms adag, laakiin waxa aan la had iyo jeer loo baahan yahay on website a caadiga ah. Sababtan darteed, waqti dheer si ay u soo bixi Java-applet`y oo ay leeyihiin xaddi badan.

flash

Laga soo bilaabo bilowgii, luqadda ee Flash waxaa loogu talagalay sida a cross-brazuerny iyo in la abuuro waxyaabaha multimedia. Tusaale ahaan, si ay u abuuraan meelaha interactive online, kulan, calammo, ciyaaryahan audio iyo video. iyo waxyaabo kale, iyadoo la isticmaalayo Flash si ay u abuuraan dalool (xidhiidha network) la mid ah, waxaad la shaqeeyo warbaahinta kartaa, in ay ku kaydiso walxaha uma baahna in codsiyada in server u diri. Waxaa jira qalab ku haboon horumarka garaafyada for Flash.

Haddii aan is barbar dhig ku qabsoomi ee Flash iyo JavaScript, taas oo waxyaabaha aad u kala duwan, khasaaro ugu weyn ee Flash waa ay tusmaynta masaakiinta by matoorada search. Tani waa sababta oo matoorada search u tagto links HTML. Sidoo kale waxaa jira awood u lahayn in ay doortaan text waa in Flash weelka.

Silverlight, Vbscript, JavaFX, qaraami

In la dhamaystiro awoodaha JavaScript marka la dhisayo interfaces iyo isgaarsiinta, isticmaalka technology Silverlight, Vbscript, JavaFX, xul.
Waxaa weli loo isticmaalo iyadoo aad u yar ka badan Flash iyo JavaScript. Si loo muujiyo sifooyinka mid kasta oo iyaga ka mid ah dhihi karaa waxa soo socda:

- xul - isticmaalaa in sharaxaad ka mid ah codsiyada desktop iyo interfaces. Laakiin waxaa suuragal ah keliya in ay dhacdo barnaamij by Mozilla.

- JavaFX - oo kaliya ka shaqeeya on computer la Java, maxaa yeelay, waa marka lagu daro luuqada.

- Vbscript - waxaa la sameeyey by Microsoft. Isna wuxuu u adeegay sidii aasaas u ah Visual Basic. luqadda Tani ma horumariyaan sinaba, wakhtigaas waxaa dhif ah loo isticmaalo, taas oo ku xidhan dhalidda JavaScript.

Silverlight - waxaa la sameeyey by Microsoft sida tartan si Flash. Waxa uu sidoo kale ma laha caan badan tan Xariga JavaScript ku siin karaan wax ka badan page script ah.

Sida loo awood JavaScript iyo wixii qalad ah JavaScript

Haddaba waxaa lagama maarmaan ah si ay ugala hadlaan dhibaatooyinka maalin walba dadka isticmaala on shabakada. Maanta, iyo aad u badan inta badan ay dhacdo in user ka dib booqasho uu page ee bulshada. network arkaa in uu furmo sare fariin qalad "JavaScript aan awood u", "Wixii hawlgal saxda ah ee goobta awood JavaScript», «JavaScript baadi». Sidee inaan ku saxno - arrin culus, maxaa yeelay, halka ay jiraan dhibaatooyin la video loading iyo sawir of user ah.

Sidee baan u awood JavaScript in Mozilla Firefox

Haddii user la shaqeeya Mozilla ah, waxaad u baahan tahay in ay "Tools" tag, ka dibna si "Settings". Markaas, on the "Tusmo" tab aad u baahan tahay in ay sax sanduuqa ku calaamadsan "Isticmaalka JavaScript".

Sida JavaScript waxaa ka mid ah Google Chrom

Si aad u awood ama gab JavaScript in browser ah habka soo socda ayaa loo baahan yahay :. "kor u Dejinta iyo maaraynta Google Chrom", "Settings", "Advanced", "data Personal (dejinta ku jira)", "JavaScript" U ogolow goobaha oo dhan si ay u isticmaalaan JavaScript (talinayaa).

Sidee baan u awood JavaScript in Opera

Si aad u awood ama gab JavaScript in browser ah ayaa loo baahan yahay in la sameeyo waxa soo socda:

- riix muhiimka ah F12 ah.

- Dooro ikhtiyaarka "Enable JavaScript".

Sida JavaScript waxaa ka mid ahaa in IE ah ( "Internet Explorer")

Si aad u awood ama gab JavaScript in "Internet Explorer", aad rabto in aad qabato waxan soo socda: "Tools", "Internet Options", "Security" tab, "Dooro Internet zone ah", "Custom Level" button, dooro "xaaladood", "U ogolow qabnay."

JavaScript in VC

Aad iyo aad loo jecel yahay ee shabakada bulshada CIS "VKontakte" inta badan soo bandhigaysaa kadis ah. Sii kordheysa, users "VKontakte" cabasho ku saabsan awood la'aanta in ay dhegeystaan audio ah, ama awood u aragto video ku.

Si loo xalliyo dhibaatada this u baahan JavaScript qalad la saxo on shabakadda "VKontakte".

Waa maxay qalad JavaScript VK?

user A booqday bogga a on shabakada bulshada iyo isku dayeen in ay bilaabaan video ama file maqal ah, laakiin markaas ka helay geeska bidix ee sare ee Looxii «JavaScript baadi: initAddMedia aan la qeexay». fariin Tani waxay u muuqataa marka qalad
«[Saaray] initAddMedia».

Hababka si ay u xaliyaan dhibaatada qaladka ah ee shabakada bulshada "VKontakte":

- First, aad rabto in aad si ay u tagaan "Start," "My Computer" folder iyo Windows. Markaasuu ku boodaan qaybta in darawalka folder system32 ah. Markaas ee folder iwm

- In dhexe ee tiro yar oo ah files in folder aad rabto in aad ka dooro file Junuudda.
Markaas file waa la furi la isticmaalayo "buugayga". Waxa ay u muuqataa sida tan: on martida loo fayl aad leedahay si aad riix badhanka mouse xaq u dooro "Open Iyada." Markaas waxaad dooran kartaa "qoraalka oo Editor WordPad».

Ka dib markii ay furan yihiin file aad rabto in aad eegto file la diiwaan localhost 127.0.0.1. Kasta entries kale waa miduu awday iyo xannibi howlgalka xasiloon audio iyo video files kaliya. lagama maarmaan u tahay in si buuxda uga file saaro dhammaan macluumaadka iyo nuqul oo kaliya localhost 127.0.0.1 Looxii. Next, waxaad u baahan tahay riix "Save" iyo guuleysatey aad computer. Marka "VKontakte" bogga xiga booqasho wax walba ka shaqeyn doonaan ganaax.