Yakagadziriswa: Gwaro rakagadzirira javascript vanilla

Dambudziko guru neGwaro rakagadzirira javascript vanilla nderekuti hazvitore mukana weazvino webhu zviyero. Izvi zvinogona kuita kuti mawebhusaiti ataridzike echinyakare uye zvinogona kuita kuti zviome kuzvichengeta.

$(document).ready(function() {
  // code goes here
});

Iyi kodhi iri kushandisa jQuery kugadzira basa rinozomhanya kana gwaro ragadzirwa. Izvi zvinowanzo shandiswa kuve nechokwadi chekuti zvese zveHTML zvinhu zvakatakurwa zvisati zvatanga chero JavaScript kodhi.

Ckecks

Ckecks iraibhurari yekuona kurongeka kweJavaScript kodhi. Iyo inopa yakapfava uye yakapfupika syntax yekuratidza cheki, pamwe nemhando dzakasiyana dzekushandisa kuita kuti cheki kodhi ive nyore.

Columns

MuJavaScript, kune marudzi maviri emakoramu: column-based layouts uye grid marongero. Makolamu-akavakirwa marongero anobva pane pfungwa yekukamura peji kuita makoramu uye kugovera zvirimo kune yega yega. Giridhi marongero, kune rumwe rutivi, shandisa grid system kuronga zvirimo pane peji.

Column-based marongero akajairika muwebhu maapplication, nepo grid marongero akajairika mukudhinda maapplication. Nekudaro, ese ari maviri marudzi emagadzirirwo anogona kushandiswa muwebhu maapplication uye kudhinda maapplication.

Kuti ugadzire koromo-yakavakirwa marongero muJavaScript, iwe unofanirwa kutanga wagadzira hurongwa hwezvinhu zvinomiririra makoramu ari papeji rako. Chinhu chimwe nechimwe chiri muhurongwa chinofanira kunge chine zvinotevera:

zita : Zita rechikamu.

: Zita rechikamu. hupamhi: Hupamhi hwekoramu mumapikiseli.

: Upamhi hwekoramu mumapikiseli. urefu: Hurefu hwekoramu mumapikiseli.

Tevere, iwe unofanirwa kugadzira muenzaniso weColumnLayout, iyo inobata kugovera nzvimbo yekoramu yega yega uye kupa zvirimo mairi. Iwe unogona kuita izvi nekupfuura nhevedzano yezvinhu zvinomiririra makoramu ako kuColumnLayout muvaki:

Conditions

Pane mashoma akajairwa mamiriro muJavaScript aunoda kuziva.

Yekutanga ndeye if statement. Ichi chirevo chinokutendera kuti uedze mamiriro uye, kana chiri chokwadi, ita kodhi mukati me block. Syntax yekuti kana chirevo ndeichi:

kana (mamiriro) {// Kodhi yekuita }

Chechipiri chimiro chauchazofanira kuziva ndicho chirevo chenguva. Ichi chirevo chinoshanda nenzira yakafanana kune kana chirevo, asi chicharamba chichiita kodhi mukati mebhuroko kusvika mamiriro acho asisina chokwadi. Iyo syntax yechinguva chirevo ndeiyi inotevera:

apo (mamiriro) {// Kodhi yekuita }