- Notifications
You must be signed in to change notification settings - Fork 112
Expand file tree
/
Copy pathquiz.js
More file actions
Latest commit
174 lines (135 loc) · 4.25 KB
/
Copy pathquiz.js
File metadata and controls
174 lines (135 loc) · 4.25 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
// select all elements
conststart=document.getElementById("start");
constquiz=document.getElementById("quiz");
constquestion=document.getElementById("question");
constqImg=document.getElementById("qImg");
constchoiceA=document.getElementById("A");
constchoiceB=document.getElementById("B");
constchoiceC=document.getElementById("C");
constcounter=document.getElementById("counter");
consttimeGauge=document.getElementById("timeGauge");
constprogress=document.getElementById("progress");
constscoreDiv=document.getElementById("scoreContainer");
// create our questions
letquestions=[
{
question : "What does HTML stand for?",
imgSrc : "img/html.png",
choiceA : "Correct",
choiceB : "Wrong",
choiceC : "Wrong",
correct : "A"
},{
question : "What does CSS stand for?",
imgSrc : "img/css.png",
choiceA : "Wrong",
choiceB : "Correct",
choiceC : "Wrong",
correct : "B"
},{
question : "What does JS stand for?",
imgSrc : "img/js.png",
choiceA : "Wrong",
choiceB : "Wrong",
choiceC : "Correct",
correct : "C"
}
];
// create some variables
constlastQuestion=questions.length-1;
letrunningQuestion=0;
letcount=0;
constquestionTime=10;// 10s
constgaugeWidth=150;// 150px
constgaugeUnit=gaugeWidth/questionTime;
letTIMER;
letscore=0;
// render a question
functionrenderQuestion(){
letq=questions[runningQuestion];
question.innerHTML="<p>"+q.question+"</p>";
qImg.innerHTML="<img src="+q.imgSrc+">";
choiceA.innerHTML=q.choiceA;
choiceB.innerHTML=q.choiceB;
choiceC.innerHTML=q.choiceC;
}
start.addEventListener("click",startQuiz);
// start quiz
functionstartQuiz(){
start.style.display="none";
renderQuestion();
quiz.style.display="block";
renderProgress();
renderCounter();
TIMER=setInterval(renderCounter,1000);// 1000ms = 1s
}
// render progress
functionrenderProgress(){
for(letqIndex=0;qIndex<=lastQuestion;qIndex++){
progress.innerHTML+="<div class='prog' id="+qIndex+"></div>";
}
}
// counter render
functionrenderCounter(){
if(count<=questionTime){
counter.innerHTML=count;
timeGauge.style.width=count*gaugeUnit+"px";
count++
}else{
count=0;
// change progress color to red
answerIsWrong();
if(runningQuestion<lastQuestion){
runningQuestion++;
renderQuestion();
}else{
// end the quiz and show the score
clearInterval(TIMER);
scoreRender();
}
}
}
// checkAnwer
functioncheckAnswer(answer){
if(answer==questions[runningQuestion].correct){
// answer is correct
score++;
// change progress color to green
answerIsCorrect();
}else{
// answer is wrong
// change progress color to red
answerIsWrong();
}
count=0;
if(runningQuestion<lastQuestion){
runningQuestion++;
renderQuestion();
}else{
// end the quiz and show the score
clearInterval(TIMER);
scoreRender();
}
}
// answer is correct
functionanswerIsCorrect(){
document.getElementById(runningQuestion).style.backgroundColor="#0f0";
}
// answer is Wrong
functionanswerIsWrong(){
document.getElementById(runningQuestion).style.backgroundColor="#f00";
}
// score render
functionscoreRender(){
scoreDiv.style.display="block";
// calculate the amount of question percent answered by the user
constscorePerCent=Math.round(100*score/questions.length);
// choose the image based on the scorePerCent
letimg=(scorePerCent>=80) ? "img/5.png" :
(scorePerCent>=60) ? "img/4.png" :
(scorePerCent>=40) ? "img/3.png" :
(scorePerCent>=20) ? "img/2.png" :
"img/1.png";
scoreDiv.innerHTML="<img src="+img+">";
scoreDiv.innerHTML+="<p>"+scorePerCent+"%</p>";
}