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>> Oratè 1: Se pou yo aplike yon sit entènèt
paj ki pèmèt itilizatè yo

2
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gade quotes machandiz.

3
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Ann sipoze premye ki gen egziste
yon dosye rele quote.php, men sa a

4
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ta ka aplike nan pi nenpòt ki
lang, men ki gen rezon nan lavi se

5
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ou kapab espere yon paramèt Pran HTTP rele
senbòl, valè ki se la

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senbòl nan stock la pou ki
ou ta renmen yon quote.

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>> Pou egzanp, si nou gade nan sa a dosye ki nan
navigatè m 'yo, quote.php, remake ke

8
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Mwen te pase nan, ki deja, yon senbòl
nan FB, pou Facebook.

9
00:00:26,900 --> 00:00:31,060
Apre sa, remake ke sa ki te tounen vin
se yon objè JSON ki gen twa kle.

10
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Rele senbòl yon sèl la, yon sèl rele
non, ak yon rele pri.

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Valè yo nan yo ki egzakteman sa
soti nan dosye a nan kesyon an.

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>> Koulye a, kite a vire atansyon nou nan la
kòmanse nan kèk HTML ak

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JavaScript.

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Isit la, nan Ajax-0.html, remake ke andedan
nan kò paj mwen an mwen gen yon fòm

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ki gen yon atribi onsubmit, nan
valè nan ki se quote epi retounen

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fo, kidonk ki espesifye ke mwen ta renmen
yo rele yon fonksyon JavaScript

17
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rele quote ak Lè sa a, retounen fo.

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Pandan se tan, andedan nan fòm sa a se yon
senbòl ki gen ID se, quote unquote,

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"Senbòl", epi Lè sa a, yon lòt opinyon ki gen
se di ki kalite soumèt ki bay m 'yon

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soumèt bouton.

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>> Pandan se tan, andedan nan tèt paj mwen an,
gen yon tag script, sous la nan

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ki se URL la nan jquery, trè a
popilè bibliyotèk JavaScript, ak anba a

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ki se yon lòt tag script, andedan nan
ki se kòmanse yo nan kèk

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JavaScript pou mwen menm mwen pral ekri.

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Sa a se fonksyon an quote ki pral
finalman dwe rele, ak andedan nan

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isit la se pou yo deklare yon varyab rele
URL, ki espesifye ke valè a nan sa a

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varyab yo dwe quote.php? senbòl = ".

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>> Epi, koulye a kite a anchene sou fen a
nan ki premye fisèl tou sa senbòl

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te itilizatè a prezimableman tape.

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Espesyalman, se pou yo fè + $ "" # senbòl
kidonk ki espesifye ke mwen ta renmen

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jwenn, ak jquery soti nan Dom m 'yo,
eleman la ki gen inik

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idantifyan, yon senbòl.

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Sonje byen, ki se tou senpleman tèks la
jaden nan ki itilizatè a se ale nan

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tape ke senbòl machandiz.

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>> Lè sa a, se pou yo rele Val, ki se yon fonksyon
oswa metòd ki pral jwenn nan

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valè ke itilizatè a tape pous

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Lè sa a, se pou yo rele yon fonksyon jquery
rele getJSON, pase nan kòm la

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premye agiman ki URL, pase nan, kòm
agiman, dezyèm lan, yon anonim

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fonksyon ki espere
yon sèl agiman.

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Done, nou pral rele li.

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Ak andedan nan fonksyon sa a anonim,
nou pral tou senpleman fè alèt, ak Lè sa a, nan

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parantèz, data.price.

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Si done, apre tout, se ke JSON
objeksyon ak twa jaden -

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senbòl, non, ak pri, pa
fè data.price mwen pral jwenn

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egzakteman sa valè.

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>> Se pou nou kounye a sove dosye a ak
louvri li moute nan yon navigatè.

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http://localhost/ajax-0.html.

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Isit la nou gen fòm sa a.

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Se pou yo tape nan FB pou Facebook
epi pou yo jwenn quote.

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Epi gen, lè sa a, se Facebook a
pri stock dènye.

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