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JavaScript Object-Oriented JavaScript (2015) Practice Project User Interface Code

Martina Vonkomerova
Martina Vonkomerova
7,790 Points
Posted by Martina Vonkomerova
Martina Vonkomerova
7,790 Points

UI is not rendering

My code for QuizUI is:

var QuizUI= function(){

displayNext:function(){
 if(quiz.hasEnded()){
 this.displayScore();
 }
  else{
    this.displayQuestion();
    this.displayChoices();
    this.displayProgress();
  }
}
displayQuestion: function(){
 this.propulateIdWithHtml("question", quiz.current().text);

}
displayChoices:function(){
  var choices= quiz.current.choice;
 for(var i=0;i<choices.length;i++){
 this.propulateIdWithHtml("choice"+i, choices[i]);
 this.guessHandler("guess",choices[i]);
 }

}
displayScore:function(){
 var gameover="<h1> Game Over <h1>";
  gameover+= "<h2> Your score is:"+quiz.score+"</h2>";i
  this.propulateIdWithHtml("quiz",gameover);

}
populateIdWithHtml: function(id,text){
  var element = document.getElementById(id);
  element.innerHTML= text;
}
displayProgress:function(){
var currentindex = quiz.current +1 ;
  this.propulateIdWithHtml("progress", "Question"+currentindex+ "of" + quiz.questions.length);
}  
guessHandler:function(id,guess){
  var element = document.getElementById(id);
  element.onclick= function(){
  quiz.guess=guess;
  QuizUI.displayNext(); 
  }
}  
}

4 Answers

Ace Motanya
Ace Motanya
31,756 Points
Ace Motanya
Ace Motanya
31,756 Points 
var QuizUI = {
  displayNext: function () {
    if (quiz.hasEnded()) {
      this.displayScore();
    } else {
      this.displayQuestion();
      this.displayChoices();
      this.displayProgress();
    }
  },
  displayQuestion: function() {
    this.populateIdWithHTML("question", quiz.getCurrentQuestion().text);
  },
  displayChoices: function() {
    var choices = quiz.getCurrentQuestion().choices;

    for(var i = 0; i < choices.length; i++) {
      this.populateIdWithHTML("choice" + i, choices[i]);
      this.guessHandler('guess' + i, choices[i]);
    }
  },
  displayScore: function() {
    var gameOverHTML = "<h1>Game Over</h1>";
    gameOverHTML += "<h2> Your score is: " + quiz.score + "</h2>";
    this.populateIdWithHTML("quiz", gameOverHTML);
  },

  populateIdWithHTML: function(id, text) {
    var element = document.getElementById(id);
    element.innerHTML = text;
  },
  guessHandler: function(id, guess) {
    var button = document.getElementById(id);
    button.onclick = function() {
      quiz.guess(guess)
      QuizUI.displayNext();
    }
  },

  displayProgress: function() {
    var currentQuestionNumber = quiz.currentQuestionIndex + 1;
    this.populateIdWithHTML("progress", "Question " + currentQuestionNumber + " of " + quiz.questions.length);
  }
}
Ace Motanya
Ace Motanya
31,756 Points
Ace Motanya
Ace Motanya
31,756 Points

its hard to read your code but umm try this and maybe you can compare and contrast and figure out where you went wrong

```var QuizUI = { displayNext: function () { if (quiz.hasEnded()) { this.displayScore(); } else { this.displayQuestion(); this.displayChoices(); this.displayProgress(); } }, displayQuestion: function() { this.populateIdWithHTML("question", quiz.getCurrentQuestion().text); }, displayChoices: function() { var choices = quiz.getCurrentQuestion().choices;

for(var i = 0; i < choices.length; i++) {
  this.populateIdWithHTML("choice" + i, choices[i]);
  this.guessHandler('guess' + i, choices[i]);
}

}, displayScore: function() { var gameOverHTML = "<h1>Game Over</h1>"; gameOverHTML += "<h2> Your score is: " + quiz.score + "</h2>"; this.populateIdWithHTML("quiz", gameOverHTML); },

populateIdWithHTML: function(id, text) { var element = document.getElementById(id); element.innerHTML = text; }, guessHandler: function(id, guess) { var button = document.getElementById(id); button.onclick = function() { quiz.guess(guess) QuizUI.displayNext(); } },

displayProgress: function() { var currentQuestionNumber = quiz.currentQuestionIndex + 1; this.populateIdWithHTML("progress", "Question " + currentQuestionNumber + " of " + quiz.questions.length); } }```

Martina Vonkomerova
Martina Vonkomerova
7,790 Points
Martina Vonkomerova
Martina Vonkomerova
7,790 Points

Thank your for your help, but it hasn't worked out yet.

christopherkaczenski
christopherkaczenski
16,079 Points
christopherkaczenski
christopherkaczenski
16,079 Points

Notice that the syntax for adding methods to object literals is slightly different than when using constructor functions.

QuizUI is an object literal, so there needs to be a comma after every method. Also, you do not need the "function()" keyword when defining an object literal with methods such as QuizUI.

Ace's code should work, but try clearing your cache.