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lines changed Original file line number Diff line number Diff line change 1+ <!DOCTYPE html>
2+ < html lang ="en ">
3+ < head >
4+ < meta charset ="UTF-8 ">
5+ < title > Videos</ title >
6+ </ head >
7+ < body >
8+ < ul class ="videos ">
9+ < li data-time ="5:43 ">
10+ Video 1
11+ </ li >
12+ < li data-time ="2:33 ">
13+ Video 2
14+ </ li >
15+ < li data-time ="3:45 ">
16+ Video 3
17+ </ li >
18+ < li data-time ="0:47 ">
19+ Video 4
20+ </ li >
21+ < li data-time ="5:21 ">
22+ Video 5
23+ </ li >
24+ < li data-time ="6:56 ">
25+ Video 6
26+ </ li >
27+ < li data-time ="3:46 ">
28+ Video 7
29+ </ li >
30+ < li data-time ="5:25 ">
31+ Video 8
32+ </ li >
33+ < li data-time ="3:14 ">
34+ Video 9
35+ </ li >
36+ < li data-time ="3:31 ">
37+ Video 10
38+ </ li >
39+ < li data-time ="5:59 ">
40+ Video 11
41+ </ li >
42+ < li data-time ="3:07 ">
43+ Video 12
44+ </ li >
45+ < li data-time ="11:29 ">
46+ Video 13
47+ </ li >
48+ < li data-time ="8:57 ">
49+ Video 14
50+ </ li >
51+ < li data-time ="5:49 ">
52+ Video 15
53+ </ li >
54+ < li data-time ="5:52 ">
55+ Video 16
56+ </ li >
57+ < li data-time ="5:50 ">
58+ Video 17
59+ </ li >
60+ < li data-time ="9:13 ">
61+ Video 18
62+ </ li >
63+ < li data-time ="11:51 ">
64+ Video 19
65+ </ li >
66+ < li data-time ="7:58 ">
67+ Video 20
68+ </ li >
69+ < li data-time ="4:40 ">
70+ Video 21
71+ </ li >
72+ < li data-time ="4:45 ">
73+ Video 22
74+ </ li >
75+ < li data-time ="6:46 ">
76+ Video 23
77+ </ li >
78+ < li data-time ="7:24 ">
79+ Video 24
80+ </ li >
81+ < li data-time ="7:12 ">
82+ Video 25
83+ </ li >
84+ < li data-time ="5:23 ">
85+ Video 26
86+ </ li >
87+ < li data-time ="3:34 ">
88+ Video 27
89+ </ li >
90+ < li data-time ="8:22 ">
91+ Video 28
92+ </ li >
93+ < li data-time ="5:17 ">
94+ Video 29
95+ </ li >
96+ < li data-time ="3:10 ">
97+ Video 30
98+ </ li >
99+ < li data-time ="4:43 ">
100+ Video 31
101+ </ li >
102+ < li data-time ="19:43 ">
103+ Video 32
104+ </ li >
105+ < li data-time ="0:47 ">
106+ Video 33
107+ </ li >
108+ < li data-time ="0:47 ">
109+ Video 34
110+ </ li >
111+ < li data-time ="3:14 ">
112+ Video 35
113+ </ li >
114+ < li data-time ="3:59 ">
115+ Video 36
116+ </ li >
117+ < li data-time ="2:43 ">
118+ Video 37
119+ </ li >
120+ < li data-time ="4:17 ">
121+ Video 38
122+ </ li >
123+ < li data-time ="6:56 ">
124+ Video 39
125+ </ li >
126+ < li data-time ="3:05 ">
127+ Video 40
128+ </ li >
129+ < li data-time ="2:06 ">
130+ Video 41
131+ </ li >
132+ < li data-time ="1:59 ">
133+ Video 42
134+ </ li >
135+ < li data-time ="1:49 ">
136+ Video 43
137+ </ li >
138+ < li data-time ="3:36 ">
139+ Video 44
140+ </ li >
141+ < li data-time ="7:10 ">
142+ Video 45
143+ </ li >
144+ < li data-time ="3:44 ">
145+ Video 46
146+ </ li >
147+ < li data-time ="3:44 ">
148+ Video 47
149+ </ li >
150+ < li data-time ="4:36 ">
151+ Video 48
152+ </ li >
153+ < li data-time ="3:16 ">
154+ Video 49
155+ </ li >
156+ < li data-time ="1:10 ">
157+ Video 50
158+ </ li >
159+ < li data-time ="6:10 ">
160+ Video 51
161+ </ li >
162+ < li data-time ="2:14 ">
163+ Video 52
164+ </ li >
165+ < li data-time ="3:44 ">
166+ Video 53
167+ </ li >
168+ < li data-time ="5:05 ">
169+ Video 54
170+ </ li >
171+ < li data-time ="6:03 ">
172+ Video 55
173+ </ li >
174+ < li data-time ="12:39 ">
175+ Video 56
176+ </ li >
177+ < li data-time ="1:56 ">
178+ Video 57
179+ </ li >
180+ < li data-time ="4:04 ">
181+ Video 58
182+ </ li >
183+ </ ul >
184+ < script >
185+ const timeNodes = Array . from ( document . querySelectorAll ( '[data-time]' ) ) ;
186+
187+ const seconds = timeNodes
188+ . map ( node => node . dataset . time )
189+ . map ( timeString => {
190+ const [ mins , secs ] = timeString . split ( ':' ) . map ( parseFloat ) ;
191+ return 60 * mins + secs ;
192+ } )
193+ . reduce ( ( totalSecs , secs ) => totalSecs = totalSecs + secs ) ;
194+
195+ let secondsLeft = seconds ;
196+
197+ const hours = Math . floor ( secondsLeft / 3600 ) ;
198+ secondsLeft = secondsLeft % 3600 ;
199+
200+ const mins = Math . floor ( secondsLeft / 60 ) ;
201+ secondsLeft = secondsLeft % 60 ;
202+
203+ console . log ( hours , mins , secondsLeft ) ;
204+
205+ </ script >
206+ </ body >
207+ </ html >
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