1
00:00:00,000 --> 00:00:00,500

2
00:00:00,500 --> 00:00:04,810
[Music kucheza]

3
00:00:04,810 --> 00:00:06,940
>> DOUG LLOYD: Kwa hiyo moja zaidi
aina ya dhana kwamba

4
00:00:06,940 --> 00:00:12,120
aina ya maporomoko chini ya mwavuli wa
JavaScript ni kitu kinachoitwa AJAX.

5
00:00:12,120 --> 00:00:15,310
Hadi hatua hii, yetu
mwingiliano na JavaScript

6
00:00:15,310 --> 00:00:17,727
imekuwa ndogo kushinikiza
kifungo na kitu kinachotokea.

7
00:00:17,727 --> 00:00:19,560
Na hasa,
jambo ambalo hufanyika

8
00:00:19,560 --> 00:00:22,950
ni tovuti yetu kuangalia na kujisikia mabadiliko.

9
00:00:22,950 --> 00:00:23,450
Sawa?

10
00:00:23,450 --> 00:00:26,540
Kama hasa, katika
hati kitu mfano wa kuigwa video,

11
00:00:26,540 --> 00:00:29,060
Mimi iliyopita rangi ya asili.

12
00:00:29,060 --> 00:00:33,240
Lakini wakati mimi alifanya hivyo, sikuwa na
kufanya maombi yoyote maalum ya ziada.

13
00:00:33,240 --> 00:00:36,800
Sikuwa na kuomba kwamba
server kutuma mimi ukurasa mpya.

14
00:00:36,800 --> 00:00:39,620
Mimi tu iliyopita kile tayari alikuwa.

15
00:00:39,620 --> 00:00:42,245
Sikuwa na kwa upya ukurasa wangu,
na mambo dhahiri iliyopita,

16
00:00:42,245 --> 00:00:43,760
hivyo hiyo ni kubwa.

17
00:00:43,760 --> 00:00:48,400
Lakini kuna baadhi dhahiri
mwingiliano mwongozo user wanaohusika.

18
00:00:48,400 --> 00:00:53,140
AJAX ni mbinu baridi ambayo inaruhusu
sisi update maudhui ukurasa wa,

19
00:00:53,140 --> 00:00:55,750
na si tu kuangalia na
kuhisi, bila reloading.

20
00:00:55,750 --> 00:00:58,610
>> Na kwa mahsusi wakati mimi
kusema kuhuisha maudhui ya ukurasa wa,

21
00:00:58,610 --> 00:01:01,990
Sisemi sisi kuandika upya
ukurasa wa kutumia JavaScript.

22
00:01:01,990 --> 00:01:06,560
Mimi kusema sisi kweli kuomba
habari zaidi kutoka server

23
00:01:06,560 --> 00:01:08,640
bila ukurasa wetu kuwa na upya.

24
00:01:08,640 --> 00:01:10,850
>> Sasa kwa kuwa aina ya kidogo ya
mbinu ya juu zaidi

25
00:01:10,850 --> 00:01:11,950
kwamba sisi ni kwenda kuzungumza
kuhusu katika video hii.

26
00:01:11,950 --> 00:01:13,720
Tunakwenda kuwa na baadhi ya mwingiliano.

27
00:01:13,720 --> 00:01:17,750
Lakini wakati sisi kufanya, mimi nina kwenda kuwa
kufanya maombi kwa mtandao wa kompyuta.

28
00:01:17,750 --> 00:01:21,140
Katika kesi hiyo, tu nini
mbio Apache yangu mtandao wa kompyuta.

29
00:01:21,140 --> 00:01:25,010
Mimi nina kwenda kuwa maamuzi ziada
maombi wakati mimi nina kutembelea ukurasa wa mtandao,

30
00:01:25,010 --> 00:01:26,890
lakini ukurasa wangu si kupata mahitaji.

31
00:01:26,890 --> 00:01:30,000
>> Ni kwenda tu kwa
asynchronously update ukurasa wangu.

32
00:01:30,000 --> 00:01:31,840
Na hiyo ndiyo, kwa kweli,
ambayo AJAX anasimama kwa,

33
00:01:31,840 --> 00:01:35,400
ni Asynchronous JavaScript na XML.

34
00:01:35,400 --> 00:01:37,910
XML ni aina nyingine ya ghafi
lugha, na unaweza aina ya

35
00:01:37,910 --> 00:01:39,680
kufikiria ni kama HTML.

36
00:01:39,680 --> 00:01:42,990
Ni kabisa kitu kimoja, lakini
ni kimsingi tu lugha ghafi.

37
00:01:42,990 --> 00:01:47,770
Hivyo ni Asynchronous
JavaScript na lugha ghafi.

38
00:01:47,770 --> 00:01:50,590
>> Hivyo ili kutumia hii
AJAX AJAX technique--

39
00:01:50,590 --> 00:01:52,230
si tofauti lugha ya programu.

40
00:01:52,230 --> 00:01:55,300
Ni tu aina ya
seti ya techniques-- sisi

41
00:01:55,300 --> 00:01:57,870
haja ya kuunda maalum
JavaScript kitu, ambayo

42
00:01:57,870 --> 00:02:00,689
inaitwa XMLHttpRequest.

43
00:02:00,689 --> 00:02:01,980
Sasa, ni rahisi sana kufanya hivyo.

44
00:02:01,980 --> 00:02:04,550
Sisi tu kusema var, chochote
tunataka kuwaita kitu hicho,

45
00:02:04,550 --> 00:02:07,030
sawa XMLHttpRequest mpya.

46
00:02:07,030 --> 00:02:11,050
Na sasa sisi sasa mmepata
AJAX aina ya kitu,

47
00:02:11,050 --> 00:02:14,370
au XMLHttpRequest
kitu, ambayo itawawezesha

48
00:02:14,370 --> 00:02:18,360
sisi asynchronously update ukurasa wetu.

49
00:02:18,360 --> 00:02:23,100
>> Baada ya sisi kuwa na kujipatia hii mpya
kitu, XMLHttpRequest hii,

50
00:02:23,100 --> 00:02:27,760
tuna kufanya kitu cha wake
onreadystatechange tabia.

51
00:02:27,760 --> 00:02:30,360
Onreadystatechange
tabia ni kweli tu

52
00:02:30,360 --> 00:02:34,080
wakati kufanya ombi
kwenye ukurasa wa mtandao, ukurasa

53
00:02:34,080 --> 00:02:35,880
huenda kwa njia ya idadi ya hatua.

54
00:02:35,880 --> 00:02:37,370
Kwanza, ombi haijawahi kutumwa.

55
00:02:37,370 --> 00:02:39,860
Kisha, ombi imekuwa
akatuma watu, lakini si alifanya juu.

56
00:02:39,860 --> 00:02:41,580
Kisha ombi imekuwa alifanya juu.

57
00:02:41,580 --> 00:02:43,680
Kisha ombi ni
kupelekwa nyuma yenu.

58
00:02:43,680 --> 00:02:46,930
>> Kisha, ombi ni
kubeba kikamilifu katika ukurasa wako.

59
00:02:46,930 --> 00:02:48,640
Hayo ni mataifa tofauti.

60
00:02:48,640 --> 00:02:53,890
Na hivyo tunahitaji kuweka yetu
mpya XMLHttpRequest kitu

61
00:02:53,890 --> 00:02:58,740
kubadili wakati mabadiliko tayari serikali.

62
00:02:58,740 --> 00:03:01,925
Na kwa kawaida, sisi kufanya hivyo kwa
kufafanua kazi bila majina, ambayo

63
00:03:01,925 --> 00:03:04,490
sisi ni ukoo na kutoka
JavaScript sasa, kwamba

64
00:03:04,490 --> 00:03:09,840
inaitwa wakati mabadiliko tayari serikali.

65
00:03:09,840 --> 00:03:11,340
Ni kweli si zaidi ya hapo.

66
00:03:11,340 --> 00:03:14,340
Tunakwenda tu kuwa kufafanua
kazi bila majina, aina ya kama nini

67
00:03:14,340 --> 00:03:16,440
tunafanya katika
JavaScript, ambapo tunataka

68
00:03:16,440 --> 00:03:18,750
na kazi bila majina
kujibu juu ya click,

69
00:03:18,750 --> 00:03:23,230
au wakati tunafanya ramani ya
vitu mbalimbali katika safu.

70
00:03:23,230 --> 00:03:25,220
>> Kitu kilichotokea wakati
kitu alikuwa clicked.

71
00:03:25,220 --> 00:03:28,810
Katika kesi hiyo, ni tu kitu ni
kinachotokea wakati hali ya ukurasa wetu

72
00:03:28,810 --> 00:03:30,160
mabadiliko.

73
00:03:30,160 --> 00:03:32,730
Kuna mali nyingine mbili
ambazo aina of-- wao siyo

74
00:03:32,730 --> 00:03:35,524
mali tu kwamba ni
asili ya XMLHttpRequest,

75
00:03:35,524 --> 00:03:36,940
lakini wao ni wale pretty muhimu.

76
00:03:36,940 --> 00:03:39,815
Kuna kitu kinachoitwa readyState,
ambayo kama pengine unaweza nadhani,

77
00:03:39,815 --> 00:03:41,750
ni kuhusiana na onreadystatechange.

78
00:03:41,750 --> 00:03:44,250
Ni kweli atakwambia
nini readyState ni.

79
00:03:44,250 --> 00:03:46,289
0, 1, 2, 3 na 4 ni
Uwezekano huko,

80
00:03:46,289 --> 00:03:48,080
na wao aina ya takribani
yanahusiana na nini

81
00:03:48,080 --> 00:03:50,030
Nilikuwa tu kuzungumza juu ya pili iliyopita.

82
00:03:50,030 --> 00:03:53,100
>> Na kisha kwa sasa, ambayo
hopefully ikiwa kila kitu akaenda OK,

83
00:03:53,100 --> 00:03:56,710
ni 200, ambayo ni short
kwa, bila shaka, sawa,

84
00:03:56,710 --> 00:03:58,330
ambayo sisi ni ukoo na kutoka http.

85
00:03:58,330 --> 00:04:03,735
Hivyo sisi ni matumaini kwamba hali yetu tayari
ni nne, na hali yetu ni 200.

86
00:04:03,735 --> 00:04:07,940
Na kama hali yetu tayari
ni nne, na majibu

87
00:04:07,940 --> 00:04:11,490
yuko tayari kuwekwa kwenye
ukurasa, na hali ni 200,

88
00:04:11,490 --> 00:04:13,580
tulikuwa na uwezo wa kufanya
kila kitu kwa mafanikio,

89
00:04:13,580 --> 00:04:17,209
sasa tunaweza asynchronously
update ukurasa wetu

90
00:04:17,209 --> 00:04:21,730
bila ya kuwa na upya
maudhui yote ya hilo.

91
00:04:21,730 --> 00:04:27,710
>> Baada tumekuwa inavyoelezwa nini kinatokea
kwa tabia onreadystatechange,

92
00:04:27,710 --> 00:04:31,020
na tumekuwa kuchunguzwa kwamba readyState
ni 4 na hali ni 200,

93
00:04:31,020 --> 00:04:33,900
basi wote tunahitaji kufanya ni
kufungua Asynchronous

94
00:04:33,900 --> 00:04:38,530
ombi, ambayo ni maamuzi tu
http ujumla kupata ombi.

95
00:04:38,530 --> 00:04:41,950
Tu kufanya hivyo programmatically,
badala ya kupitia mtandao wetu browser.

96
00:04:41,950 --> 00:04:43,786
Na kisha sisi kutuma ombi hilo.

97
00:04:43,786 --> 00:04:45,660
Kwa hiyo kile gani hii labda
kuangalia kama katika mazingira?

98
00:04:45,660 --> 00:04:49,790
Hivyo hapa ni kazi ambayo
mikataba na maombi AJAX.

99
00:04:49,790 --> 00:04:50,290
SAWA?

100
00:04:50,290 --> 00:04:52,430
Na nimekuwa kiholela alisema
anapokea hoja.

101
00:04:52,430 --> 00:04:55,550
Na hii aina ya
mkuu mifupa hapa.

102
00:04:55,550 --> 00:05:00,890
Mwanzoni kabisa, sisi kupata
sisi wenyewe mpya XMLHttpRequest kitu.

103
00:05:00,890 --> 00:05:03,830
Kisha, mimi haja ya kuweka
onreadystatechange tabia.

104
00:05:03,830 --> 00:05:06,970
Na hivyo mimi nina kwenda kusema
wakati mabadiliko readyState,

105
00:05:06,970 --> 00:05:10,110
Mimi nataka wewe piga kazi hii.

106
00:05:10,110 --> 00:05:12,570
>> Ambayo ni kwenda kuuliza
swali, kama readyState

107
00:05:12,570 --> 00:05:17,240
ni 4, ikiwa readyState imebadilika
kuwa 4, na hali ilikuwa 200,

108
00:05:17,240 --> 00:05:20,799
hivyo alikuwa ombi mafanikio, mimi
wanataka kufanya kitu kwa ukurasa.

109
00:05:20,799 --> 00:05:22,590
Na tutaweza kuangalia
mfano wa kile

110
00:05:22,590 --> 00:05:25,010
kitu ambacho inaweza kuwa katika pili.

111
00:05:25,010 --> 00:05:27,830
Hivyo basi, sasa mimi kuwa defined
kazi yangu bila majina,

112
00:05:27,830 --> 00:05:31,340
majibu yangu kazi wakati wowote
readyState mabadiliko.

113
00:05:31,340 --> 00:05:37,120
>> Hivyo basi mimi tu haja ya kufungua
kuomba, kwa kutumia njia Open.

114
00:05:37,120 --> 00:05:39,160
Na kisha, mimi kutuma ombi hilo.

115
00:05:39,160 --> 00:05:41,980
Na hebu tuangalie
mfano thabiti zaidi

116
00:05:41,980 --> 00:05:46,290
nini AJAX anaweza kufanya juu ya kurasa za mtandao wetu.

117
00:05:46,290 --> 00:05:49,740
Hivyo nina hapa ni rahisi sana
ukurasa aitwaye home.html.

118
00:05:49,740 --> 00:05:53,620
Na mimi nimepata habari unaendelea
hapa na aina fulani ya orodha kunjuzi.

119
00:05:53,620 --> 00:05:55,390
>> Na tutaweza kupitia upya hii katika moja ya pili.

120
00:05:55,390 --> 00:05:59,150
Lakini nadhani tunapaswa sasa kuchukua
kuangalia halisi kanuni chanzo.

121
00:05:59,150 --> 00:06:01,080
Na hivyo, mimi nina kwenda kufungua home.html.

122
00:06:01,080 --> 00:06:03,490

123
00:06:03,490 --> 00:06:04,740
Na tutaweza kuona nini kinaendelea.

124
00:06:04,740 --> 00:06:08,240
Hivyo hadi saa juu sana hapa, nina
baadhi ya mambo JavaScript kwamba kinaendelea.

125
00:06:08,240 --> 00:06:12,470
>> Na hapa, mimi inaonekana kuwa
div ambao ID ni infodiv,

126
00:06:12,470 --> 00:06:15,290
na baadhi ya taarifa
ni kwenda huko.

127
00:06:15,290 --> 00:06:16,374
Na kisha mimi kuwa aina hii.

128
00:06:16,374 --> 00:06:18,081
Na ndani ya hii
fomu, nina kitu

129
00:06:18,081 --> 00:06:20,200
aitwaye Teule, ambayo
ni tu orodha kuacha chini

130
00:06:20,200 --> 00:06:22,150
pamoja na kundi la chaguzi mbalimbali.

131
00:06:22,150 --> 00:06:26,150
Na inaonekana wakati kwamba mabadiliko, wakati
chaguo kwamba imekuwa kuchaguliwa ina

132
00:06:26,150 --> 00:06:30,600
iliyopita, mimi nina kwenda kuwaita
baadhi ya kazi cs50Info,

133
00:06:30,600 --> 00:06:33,190
na kisha mimi nina kwenda kwa
kupita katika this.value,

134
00:06:33,190 --> 00:06:35,740
ambapo hii inahusu
ambayo chaguo alichaguliwa,

135
00:06:35,740 --> 00:06:39,820
na thamani ya mmoja wa haya hapa, chaguo
thamani = sawa na tupu, "Blumberg,"

136
00:06:39,820 --> 00:06:42,610
"Bowden," "chan," na "Malan."

137
00:06:42,610 --> 00:06:45,090
>> Kwa hiyo kile ni wazi kunaweza
kutokea hapa wakati mimi kufanya hivyo?

138
00:06:45,090 --> 00:06:48,800
Naam, hebu kuchukua
kuangalia blumberg.html.

139
00:06:48,800 --> 00:06:51,330

140
00:06:51,330 --> 00:06:53,924
Inaonekana kama ni tu
snippet ya baadhi Html.

141
00:06:53,924 --> 00:06:56,090
Na kwa kweli, ni nini nina matumaini
kinaenda kutokea hapa

142
00:06:56,090 --> 00:07:00,020
ni mimi nina kwenda kuwa na uwezo wa kuziba
Html hii moja kwa moja kwenye mtandao ukurasa wangu

143
00:07:00,020 --> 00:07:02,970
bila ya kuwa na upya
ukurasa, kiasi kwamba wakati

144
00:07:02,970 --> 00:07:07,510
Mimi kuchagua Hana kutoka kushuka chini
orodha, taarifa kuhusu Hana,

145
00:07:07,510 --> 00:07:11,100
hasa, habari hii
hapa katika blumberg.html,

146
00:07:11,100 --> 00:07:12,574
ni nini inaonyesha juu ya ukurasa.

147
00:07:12,574 --> 00:07:13,740
Na sina kupata mahitaji.

148
00:07:13,740 --> 00:07:16,842
Na kama mimi waliamua mtu mwingine,
taarifa zao bila kuonyesha up.

149
00:07:16,842 --> 00:07:17,550
Je, mimi kufanya hivyo?

150
00:07:17,550 --> 00:07:20,290
Tena, hii inahitaji
yetu kwa kutumia baadhi AJAX.

151
00:07:20,290 --> 00:07:22,540
Na hivyo, tutaweza kufungua ajax.js.

152
00:07:22,540 --> 00:07:25,550
Na hapa ni kwamba kazi, cs50Info.

153
00:07:25,550 --> 00:07:27,410
Kama jina ni kitu, mimi kurudi.

154
00:07:27,410 --> 00:07:31,450
Sitakuja kufanya kitu chochote kama
chaguo tupu amechaguliwa.

155
00:07:31,450 --> 00:07:35,420
Vinginevyo, mimi nina kwenda kwa
kujenga XMLHttpRequest mpya.

156
00:07:35,420 --> 00:07:39,020
Na kisha mimi nina kwenda kusema, wakati
mabadiliko readyState, piga kazi hii.

157
00:07:39,020 --> 00:07:43,630
>> Na kama readyState ni
4 na hali ni 200,

158
00:07:43,630 --> 00:07:45,740
hapa ni kidogo
ya jQuery kwenye mstari 13.

159
00:07:45,740 --> 00:07:50,450
Lakini wote mimi nina kufanya ni kusema,
kubadilisha yaliyomo ya infodiv

160
00:07:50,450 --> 00:07:57,820
kuwa chochote I got nyuma kama
majibu kutoka kwa HttpRequest yangu.

161
00:07:57,820 --> 00:07:59,590
>> HttpRequest yangu ni nini?

162
00:07:59,590 --> 00:08:02,020
Naam, hiyo ni haki
hapa kwenye mstari 18 na 19.

163
00:08:02,020 --> 00:08:08,550
Mstari 18, mimi kimsingi kuandaa
a kupata ombi kwa jina + .html.

164
00:08:08,550 --> 00:08:11,170
Na tena, jina hapa ni
Hoja hiyo ilikuwa

165
00:08:11,170 --> 00:08:14,280
kupita katika kama parameter cs50Info.

166
00:08:14,280 --> 00:08:18,460
>> Hivyo kimsingi, Mimi kupita katika mtu wa
jina, ambayo ilikuwa kwamba seti ya chaguzi

167
00:08:18,460 --> 00:08:22,980
kuwa tuliona katika
kushuka chini katika orodha ya fomu.

168
00:08:22,980 --> 00:08:24,450
Mimi nina kupata jina hilo.

169
00:08:24,450 --> 00:08:29,530
Na mimi kusema napenda wewe
tafadhali kupata kwa ajili yangu kwamba file.html,

170
00:08:29,530 --> 00:08:31,020
na kisha kutuma ombi hilo.

171
00:08:31,020 --> 00:08:34,820
>> Na hivyo kuwa onreadystatechange ni kwenda
kuwa kusikiliza na kusubiri na kusubiri

172
00:08:34,820 --> 00:08:39,460
na kusubiri mpaka readyState
ni 4, na hali ni 200.

173
00:08:39,460 --> 00:08:44,970
Hivyo ni tayari kutumikiwa,
na ombi ilikuwa na mafanikio.

174
00:08:44,970 --> 00:08:49,500
Na kisha kama ni, ni kwenda
kubadilisha yaliyomo ya infodiv

175
00:08:49,500 --> 00:08:53,030
kuwa majibu Nakala kwamba mimi got nyuma.

176
00:08:53,030 --> 00:08:54,930
>> Basi hebu angalia jinsi hii
ili kweli kazi.

177
00:08:54,930 --> 00:08:58,860
Hivyo tutaweza kichwa juu ya browser yangu
dirisha, na tutaangalia hapa.

178
00:08:58,860 --> 00:09:01,359
Basi hebu tuangalie
nini kinaendelea hapa katika AJAX.

179
00:09:01,359 --> 00:09:03,400
Hivyo tutaweza kuchagua mtu
kutoka orodha kuacha chini.

180
00:09:03,400 --> 00:09:06,079
Hivyo katika kesi hii, hebu
kuchagua tu Hana.

181
00:09:06,079 --> 00:09:08,120
Na taarifa kwamba Hana
Maelezo imebadilika,

182
00:09:08,120 --> 00:09:11,030
lakini sikuwa na any-- yangu
ukurasa hakuwa kabisa upya.

183
00:09:11,030 --> 00:09:12,190
Mambo walikaa.

184
00:09:12,190 --> 00:09:13,320
Wengi wa mambo walikaa.

185
00:09:13,320 --> 00:09:14,320
AJAX Mtihani hakuna mabadiliko.

186
00:09:14,320 --> 00:09:16,700
Kifungo yenyewe, hii
kushuka chini orodha hakuna mabadiliko.

187
00:09:16,700 --> 00:09:18,260
Lakini habari huko alifanya mabadiliko.

188
00:09:18,260 --> 00:09:20,218
Na kulingana na jinsi
haraka kompyuta hatua yangu,

189
00:09:20,218 --> 00:09:24,430
wewe kweli wanaweza kuona kwamba maudhui
kutoweka na kisha reappears kweli

190
00:09:24,430 --> 00:09:24,930
haraka.

191
00:09:24,930 --> 00:09:27,320
Hiyo ni bidhaa kuwa
kufutwa kutoka infodiv,

192
00:09:27,320 --> 00:09:29,940
na kisha kubadilishwa na
mpya Asynchronous ombi.

193
00:09:29,940 --> 00:09:34,410
>> Hivyo kama mimi kubadili kuwa ni kusema,
Rob-- na tena, kuangalia,

194
00:09:34,410 --> 00:09:38,379
na labda tutaweza kuona ni kweli
kutoweka na reappear haraka.

195
00:09:38,379 --> 00:09:38,920
Unaweza kuona kwamba?

196
00:09:38,920 --> 00:09:41,400
Jinsi tu popped mbali,
na kisha refilled?

197
00:09:41,400 --> 00:09:43,640
Hiyo ni ombi AJAX
aina ya unafanyika.

198
00:09:43,640 --> 00:09:46,060
Na hivyo kutegemea
mtu mimi kuchagua, mimi nina

199
00:09:46,060 --> 00:09:50,690
kufanya Asynchronous tofauti
ombi faili mbalimbali

200
00:09:50,690 --> 00:09:52,730
kwamba nina kwenye kompyuta yangu.

201
00:09:52,730 --> 00:09:55,550
Na yaliyomo ya yangu
infodiv ni uppdatering,

202
00:09:55,550 --> 00:09:58,457
kulingana na yupi kati ya hawa nimekuwa waliochaguliwa.

203
00:09:58,457 --> 00:10:00,040
Hivyo hiyo ni kweli yote kuna AJAX.

204
00:10:00,040 --> 00:10:04,090
Ni inaruhusu sisi kufanya Asynchronous hizi
maombi, updates kwa ukurasa.

205
00:10:04,090 --> 00:10:06,450
Bila ya kuwa na
mahitaji ukurasa mzima,

206
00:10:06,450 --> 00:10:08,520
tunakwenda kupata mpya
yaliyomo humo kwa kufanya

207
00:10:08,520 --> 00:10:11,170
mpya ombi safi kwa kompyuta.

208
00:10:11,170 --> 00:10:13,420
Na hivyo, kurasa zetu wanaweza kuwa
kidogo kabisa nguvu zaidi.

209
00:10:13,420 --> 00:10:15,128
>> Na kama sisi kupata zaidi
na zaidi ya juu, wewe

210
00:10:15,128 --> 00:10:17,700
ili kupata mambo kama
kusema, email Inbox yako,

211
00:10:17,700 --> 00:10:19,850
ambapo huna kufanya kitu chochote.

212
00:10:19,850 --> 00:10:22,560
Huna click
kushuka chini orodha au bonyeza kitu chochote,

213
00:10:22,560 --> 00:10:25,920
na kwa ghafla, newest yako
email inaonyesha juu kwa juu.

214
00:10:25,920 --> 00:10:27,840
Hiyo ni pia tu ombi Ajax.

215
00:10:27,840 --> 00:10:30,460
Ajax inaomba yako
server, email server,

216
00:10:30,460 --> 00:10:33,360
kutuma juu ya taarifa zote
kuhusu barua pepe yako karibuni,

217
00:10:33,360 --> 00:10:38,110
na kubadilisha nini kuona kwenye
screen kuwa kuweka yako newest ya barua pepe.

218
00:10:38,110 --> 00:10:41,080
Na kama una mwezi mmoja katika
huko, basi maudhui ya kwamba div

219
00:10:41,080 --> 00:10:44,580
kutakuwa na mabadiliko kutafakari
updated maudhui.

220
00:10:44,580 --> 00:10:45,480
Mimi nina Doug Lloyd.

221
00:10:45,480 --> 00:10:47,500
Hii ni CS50.

222
00:10:47,500 --> 00:10:49,229