JavaScripts ndi chiyani? Kuweta JavaScript ntchito

Web-zolembedwa ndi mapulogalamu amene ali mwachindunji mu HTML-kachidindo kapena basi owona, zimene bwino. Ndondomekozi zinalembedwa JavaScript. Choncho, popanda chakuti Javascripts zimenezi, tikhoza kunena kuti ndi chinenero mapulogalamu kuti kutanthauziridwa.

JavaScript ndi kuwerenga ndi osatsegula, ndiyeno mawu wolembedwa, ndi kusamalira, zimene zalembedwa pamwambazi tsamba. JavaScript pa malembedwe anu ndi ofanana ndi zinenero mapulogalamu monga Java, C ++ ndi C.

JavaScript alitcha chikuoneka kuti chitukuko cha makampani monga Sun Microsystems (Oracle) ndi Netscape (Mozilla). Dzina lenileni la chilankhulidwe chinali LiveScript. Komabe, chifukwa chakuti pa nthawiyo anali wotchuka kwambiri chinenero Java ku kampani Sun Microsystems, Netscape kampani dipatimenti malonda, anaganiza kusintha dzina la chinenero mu JavaScript. Pamene apeza kuti njila iyi anawonjezera chofala. Komanso, kupatula chakuti Javascripts amenewa, tisaiwale kuti Java ndi JavaScript zilankhulo ziwiri zosiyana.

ECMA-262 ndi muyezo boma la chinenero. Dzina la chinenero JavaScript - ECMAScript.

Phunziro la chinenero ichi adzakhala zothandiza kudziwa isanafike za CSS ndi HTML. Ngati pamaso mphindi ino simukudziwa za CSS ndi HTML, ayenera yomweyo bwino.

Zoletsa ndi mphamvu JavaScript

The zotsatirazi mbali kuwonekera ntchito pa intaneti masamba a script [kuchotsedwa]:

• Kuwonjezera zosiyanasiyana zotsatira makanema ojambula, amene si anazindikira mwa HTML ndi CSS.
• Mphamvu kusintha HTML zinthu zili ndi kuwonjezera Tags popanda kutsegulaso tsambali.
• Tsatirani chochitika (poyankha athandizira me) - processing keystrokes pa kiyibodi ndi cholozera mbewa.
• Kukhazikitsa macheke awa, amene anayambitsa m'minda ya mawonekedwe asanawatumizire ku makina. Izi amachepetsa katundu pa makina ndi kufulumizitsa kumalo antchito.
• Kuona Baibulo la osatsegula ndi kutsegula tsamba limene ndimafuna zochokera izi.

Izi si mndandanda wa mphamvu malembedwe amene alembedwa chinenero ichi, JavaScript ntchito tikulidziwa tanthauzo.

Kuwonjezera zizindikiro zimenezi pali zofooka mwa zitsanzo ntchito:

• Palibe mwayi owona kuti anayikidwa pa kompyuta malangizo. Ambiri, alibe kunja tsamba yokha. Kupatulapo angakhale keke yekha kuti akhoza kuwerenga ndi kulemba ndi JavaScript. Zinthu mtundu zambiri kokha zofunika tsamba katundu mofulumira.
• Palibe kuthekera kwa mafunso mtanda malo, mwachitsanzo kupeza mwayi masamba Web kuti ali pa madambwe osiyana, ngakhale yotseguka totsegulira chomwe chili pafupi.
• Palibe njira kutseka totsegulira ndi mazenera anatsegulidwa ndi izo.
• Palibe kuthekera kwa chitetezo m'mipukutu yoyambirira pa tsamba ndi lamulo kutengera zithunzi kapena lemba tsambali. Zimenezi zitanthauza n'zotheka kuwonjezera zoletsa zina zimene zingathe JavaScript ntchito.

Malamulo amenewa ali m'njira zina zovuta kuti akapereke malamulo njiru.

Javascripts ndi chiyani?

Monga ine tanenera kale, JavaScript - chinenero chimene amapereka interactivity kwa masamba. Mothandizidwa ndi chinenero ndi ntchito kuti ali m'gulu la HTML-code. Mwachitsanzo, mawonekedwe kulembetsa kapena mafunso mafomu ndi wosuta. JavaScript kawirikawiri kusokonezedwa ndi Java, koma pakati pa zinenero aang'ono awa ofanana.

Ena ngakhale kuyerekeza ndi zinenero zina JavaScript Ruby, Self, Python. Koma ndi chiyankhulo osiyana.

kugwiritsa JavaScript

Kugwiritsa JavaScript, mungathe kusintha tsamba, kusintha mfundo za kalembedwe, kuwonjezera kapena kuchotsa Tags. N'zothekanso kuphunzira za zochita wosuta ake pa tsamba (kuchepa kapena kuonjezera m'dera ntchito yotchinga, kudina ndi mbewa, atolankhani makiyi aliyense, tsamba scrolling). N'zotheka mwayi wolankhula ndi mbali iliyonse HTML-malamulo ndi mpheto ndi mchitidwe uwu. Choncho yankho la funso "JavaScripts ndi chiyani?» Kodi kukhala mwayi download deta popanda kutsegulaso tsambali Mauthenga athandizira, kukonza kapena kuwerenga keke ndi kuchita zochita zina zambiri.

Maziko a wapadera JavaScript

The m'maganizo chachikulu cha chinenero ichi ndi kuti ali thandizo pafupifupi onse asakatuli ndipo ali kusakanikirana zonse ndi iwo. zochita zonse mu JavaScript ndi lophweka. Palibe zida zina kuti accommodates ubwino zonsezi. Mwachitsanzo, palibe mtanda osatsegula, iwo amapereka mwa asakatuliwa onse (ndi XUL, ActiveX, VBScript). Komanso pali anthu amene sadziwa bwinobwino cigawo ndi osatsegula. Iwo Silverlight, kung'anima, Java. Padakali ndi chitukuko chachikulu cha njira imeneyi, ndi JavaScript zinthu akupangidwa 2.

Njira zinenero programmmirovaniya

Ndi kuti JavaScript ndi zochepa. Pankhaniyi, kudzakuthandizani zotsatirazi m'zinenero mapulogalamu.

Java

The chinenero kwambiri ntchito - Java. Mothandizidwa ndi chinenero anafotokoza ma aligorivimu zovuta, koma si nthawi zonse chofunika pa webusaiti ochiritsira. Pachifukwa ichi, nthawi yaitali download Java-applet`y ndipo ndi yambiri.

kung'anima

Kuyambira pachiyambi, chilankhulidwe cha kung'anima udaikidwa monga mtanda brazuerny ndi kulenga zinthu matumizidwe ophatikizika amawu, nyimbo ndi zithunzi. Mwachitsanzo, kulenga malo zokambirana online, masewera, mbendera, osewera kwa wailesi ndi kanema. Mwa zina, ntchito kung'anima kulenga zitsulo (netiweki), mukhoza ntchito ndi TV, kusunga zinthu zimene safuna kutumiza zopempha makina. Pali yabwino mawonekedwe zida chitukuko cha kung'anima.

Ngati Tikayerekeza zolakwa za kung'anima ndi JavaScript, amene zinthu zosiyana kwambiri, sangathe waukulu kung'anima ndi indexing ake osauka ndi injini kufufuza. Ichi ndi chifukwa injini kufufuza kupita limasonyeza HTML. Komanso palibe angathe kusankha malemba amene ali mu kung'anima chidebe.

Silverlight, Vbscript, JavaFX, XUL

Yothandizana JavaScript mphamvu pamene akumanga polumikizira ndi aya, ntchito Silverlight luso, Vbscript, JavaFX, XUL.
Iwo ntchito akadali kawirikawiri kuposa kung'anima ndi JavaScript. Kuunikila makhalidwe a aliyense wa iwo akhoza kunena izi:

- XUL - ntchito pofotokoza ntchito kompyuta ndi polumikizira. Koma n'zotheka okha pa nkhani ya pulogalamu ndi Mozilla.

- JavaFX - amangogwira ntchito pa kompyuta ndi Java, chifukwa kuwonjezera pa chinenero.

- Vbscript - anali mwakuchita Microsoft. Iye anali maziko zithunzi Basic. chilankhulo woterewu mwa njira iliyonse, mu masiku awa si ankagwiritsa, malingana ndi zokolola ndi JavaScript.

Silverlight - anali mwakuchita Microsoft monga mpikisano kung'anima. Iye alibe kutchuka kuyambira JavaScript zingwe angapereke kwambiri kuposa script page.

Kodi kuti athe JavaScript ndi zimene zolakwa JavaScript

Tsopano m'pofunika kukambirana mavuto a owerenga pa maukonde. Lero, ndi zambiri zimachitika kuti wosuta pambuyo kuyendera tsamba wake mu chikhalidwe. zopezera amaona mu zenera chapamwamba uthenga zolakwa "JavaScript siwoyatsa", "Pakuti kugwira bwino ntchito malo athe JavaScript», «JavaScript zolakwa». Kodi vutolo - nkhani yaikulu, chifukwa pamene pali mavuto ndi potsegula kanema ndi chithunzi cha wosuta.

Kodi Ine athe JavaScript ku Mozilla Firefox

Ngati wosuta akugwira ntchito ku Mozilla, muyenera kupita ku "Zida", ndiye kuti "Zikhazikiko". Ndiye, pa tsamba "Zamkatimu" muyenera bango bokosi amalembedwa kuti "Ntchito JavaScript".

Monga JavaScript ali nawo mu Google Chrom

Kuti athe kapena kuletsa JavaScript mu osatsegula Ndondomeko zotsatirazi chofunika :. "Kukhazikitsa ndi kusamalira Google Chrom", "Zikhazikiko", "mwaukadauloZida", "deta (atakhala zili)", "JavaScript" Lolani malo onse kugwiritsa ntchito JavaScript (kuchita).

Kodi Ine athe JavaScript mu Opera

Kuti athe kapena kuletsa JavaScript osatsegula ali wofunikila kuchita zotsatirazi:

- atolankhani F12 kiyi.

- Sankhani njira "Yambitsani JavaScript".

Monga JavaScript zili m'gulu la IE ( "Internet Explorer")

Kuti athe kapena kuletsa JavaScript mu "Internet Explorer," mukufuna kuchita zotsatirazi: "Zida", "Internet Mungasankhe", "Security" tsamba, "Sankhani zone Internet", "Mwambo mlingo" batani, kusankha "nkhani", "Lolani zolembedwa."

JavaScript mu VC

Kwambiri otchuka mu CIS ochezera a pa Intaneti "VKontakte" pafupipafupi akupereka zodabwitsa. Makamaka, owerenga "VKontakte" kudandaula sungathe kumvera wailesi, kapena kulephera kuona video.

Kuti athetse vuto limeneli kumafuna JavaScript zolakwa kukonza maukonde "VKontakte".

Kodi JavaScript VK kulakwitsa?

wosuta A anapita tsamba pa maukonde chikhalidwe ndi anayesa kuyamba kanema kapena file wailesi, koma anapeza mu chapamwamba kumanzere ngodya ya mawu akuti «JavaScript zolakwa: initAddMedia si kumatanthauza». uthenga Zikuoneka pamene vuto
«[Anachotsa] initAddMedia».

Njira yothetsera mavuto ndi vuto mu ochezera a pa Intaneti "VKontakte":

- Choyamba, mukufuna kupita "Start," "Mai Computer" Foda ndi Windows. Ndiye kudumpha gawo mu dalaivala system32 mufoda. Kenako mu chikwatu etc.

- Pakati ochepa owona mu chikwatu mukufuna kusankha makamu file.
Ndiye file tidutse ntchito "kope". Izo zikuwoneka ngati izi: pa makamu kupala muli kupitiriza pomwe mbewa batani ndi kusankha "Open Ndi." Ndiye inu mukhoza kusankha "lemba Editor WordPad».

Pambuyo kutsegula file mukufuna kuyang'ana file ndi mbiri ya 127.0.0.1 localhost. zolemba zina ali superfluous ndi kokha kulepheretsa ndipo ndigwire ntchito khola la zomvetsera ndi kanema. M'pofunika kuchotsa kwathunthu mfundo zonse kuchokera wapamwamba ndi kukopera yekha lolembedwa 127.0.0.1 localhost. Kenako, muyenera dinani "Save" ndi kuyambitsanso kompyuta yanu. Pamene "VKontakte" patsamba wotsatira ulendo zonse ntchito zabwino.