Dambudziko guru rekuratidza gore rekodzero pane digital media nderekuti zvinogona kunetsa kuona kuti ndeapi makore akafukidzwa nekodzero. Iri rinogona kuve dambudziko kana uchiedza kuona kana imwe chidimbu chemidhiya chichiri kuchengetedzwa nekodzero.
var d = new Date();
var n = d.getFullYear();
document.getElementById("year").innerHTML = n;
Iyi kodhi inogadzira chinhu chitsva chemazuva, uye inowana gore rakazara kubva pane icho chinhu chemazuva uye ichichengeta mune inochinja n. Pakupedzisira, inowana chinhu chine id = "gore" uye inoshandura iyo yemukatiHTML kune kukosha kwen.
kutsvaka
MuJavaScript, unogona kushandisa yekutsvaga () basa kutsvaga tambo mune zvinyorwa kana tambo buffer. Kutsvaga () basa rinotora nharo mbiri: zvinyorwa zvekutsvaga uye tambo yekutsvaga.
Kutsvaga () basa rinodzosa chinhu chine zvimiro zviviri: iyo yakawanikwa mavara uye chinzvimbo cheyakawanikwa chinyorwa muzvinyorwa kana tambo buffer. The found text property ine tambo inofananidzwa, ukuwo nzvimbo yacho ichikuudza kuti mumavara kana tambo buffer pakawanikwa tambo inofananidzwa.
Heino muenzaniso unoshandisa iyo yekutsvaga () basa kuti uwane ese mameseji e "katsi" mune chinyorwa faira:
var file = "./myfile.txt"; // vhura faira yekuverenga var zviri mukati = file.search("katsi"); // wana chinhu chine // foundText uye position console.log(contents); // anodhinda "Hapana mhinduro."
nzira
Pane nzira dzakawanda muJavaScript. Dzimwe dzenzira dzakajairika dzakanyorwa pazasi.
Nzira Tsanangudzo alert() Inoratidza meseji pachiratidziri. bind () Inosungira basa kune chimwe chiitiko. call() Inodaidza basa. clear() Inodzima skrini. console.log() Inodhinda ruzivo kune iyo console. document.getElementById(id) Inotora chinhu nehunhu hwayo. exit () Inopedza script execution uye inodzokera kuhwindo guru rebrowser. forEach () Inodzokorora bhuroko rekodhi yechinhu chimwe nechimwe muhurongwa kana muunganidzwa. kana (mamiriro) Inoongorora mamiriro uye, kana ichokwadi, inoita iyo kodhi iri mukati me block; kana zvisina kudaro, inoita imwe block yekodhi. keydown(chiitiko) Inokonzeresa chiitiko kana kiyi yakatsikirirwa pasi pane keyboard. lastModified Date Returns kana kuseta zuva nenguva iyo gwaro iri rakapedzisira kugadziridzwa (mumamilliseconds). urefu Inodzosa kureba kwechinhu (mumabhayiti). Math.floor(nhamba) Inotenderedza nhamba kudzika kusvika pahuwandu hwehuwandu . Math. ceil(nhamba) Inotenderedza nhamba kusvika padhuze nhamba yakazara . new Date () Inogadzira chinhu chitsva cheDate uchishandisa zuva razvino uye nguva semaparamita ayo (mumamilliseconds). Object clone() Inogadzira uye inodzosa kopi yechinhu obj . prototype Inokutendera iwe kuwana zvivakwa uye nzira dzechinhu cheni prototype (kureva, zvinhu zvakatorwa kubva muchinhu ichi). pushStackTrace(stackTrace) Inowedzera stack trace ruzivo kune mhosho meseji iri kuratidzwa neconsole. setTimeout(nguva, [callback]) Inoisa nguva yekubuda kwekodhi mushure mekupihwa huwandu hwemamilliseconds apfuura; kana callback yapihwa, ichaitwa mushure mekunge nguva yapera yapera setInterval(nguva, [callback]) Inoisa nguva yekuitwa kwekodhi mushure mekupihwa huwandu hwemamilliseconds apfuura; kana callback ikapihwa, ichaitwa pese pese nguva inopera
