以下是测验的完整JavaScript代码。它适用于桌面浏览器。但是，当我在手机上测试它时，它不起作用。
移动设备加载JSON测验，但在选择所有答案后，它不会冻结所有选定的答案并显示结果。相反，没有任何反应，没有显示/计算结果，用户可以继续选择答案。
我对手机上的JavaScript没有经验，也不知道导致问题的原因。
我删除了一些只是附加html的代码部分，以减少大小。
您可以在此处查看：plnkr.co/edit/tkCQVxoIq9oOiApeUY66?p=preview
// Adds the functionality to check if an element has a class
HTMLElement.prototype.hasClass = function (className) {
"use strict";
if (this.classList) {
return this.classList.contains(className);
}
return (-1 < this.className.indexOf(className));
};
// Adds the ability to remove classes from elements
HTMLElement.prototype.removeClass = function (className) {
"use strict";
if (this.classList) {
this.classList.remove(className);
}
return this;
};
var BF_QUIZ = {};
BF_QUIZ.quiz = function () {
"use strict";
// Sets variables
var highest_score, quiz_div, quiz_title, quiz_image, questions = [],
results = [], inputs = [], answers = [], userAnswers = [],
// Gets the Quiz "canvas"
getQuizCanvas = function getQuizCanvas() {
quiz_div = document.getElementById("bf-quiz");
},
// Parses the JSON data passed from the Loader
getJSONData = function getJSONData(json_data) {
//Main Quiz Title
quiz_title = json_data[0].quiz_title;
//Main Quiz Image
quiz_image = json_data[0].quiz_image;
//Populates questions arrary with questions from JSON file
for (var i = 0; i < json_data[0].quiz_questions.length; i++) {
questions.push(json_data[0].quiz_questions[i]);
}
//Populates results array with results from JSON file
for (var j = 0; j < json_data[0].quiz_results.length; j++) {
results.push(json_data[0].quiz_results[j]);
}
},
// Writes the Quiz into the document
writeQuiz = function writeQuiz() {
var newQuizWrapper, newTitle, newQuestionTextWrapper, newQuestionText,
newAnswerForm, newAnswer, newAnswerImage, newAnswerTextWrapper, newAnswerInput,
newAnswerText, newQuestion;
newQuizWrapper = document.createElement("div");
newQuizWrapper.className = "quiz-wrapper";
newTitle = document.createElement("h1");
newTitle.innerHTML = quiz_title;
newQuizWrapper.appendChild(newTitle);
for (var i = 0; i < questions.length; i++) {
newQuestionTextWrapper = document.createElement("div");
newQuestionTextWrapper.className = "quiz-question-text-wrapper";
newQuestionText = document.createElement("h2");
newQuestionText.innerHTML = questions[i].question.text;
newQuestionTextWrapper.appendChild(newQuestionText);
newAnswerForm = document.createElement("form");
for (var j = 0; j < questions[i].question.question_answers.length; j++) {
newAnswer = document.createElement("div");
newAnswer.className = "quiz-answer";
newAnswer.setAttribute("data-quizValue",
questions[i].question.question_answers[j].answer.value);
if (questions[i].question.question_answers[j].answer.image) {
newAnswerImage = document.createElement("img");
newAnswerImage.src = questions[i].question.question_answers[j].answer.image;
newAnswer.appendChild(newAnswerImage);
}
else{
//no image
}
newAnswerTextWrapper = document.createElement("div");
newAnswerTextWrapper.className = "quiz-answer-text-wrapper";
newAnswerTextWrapper.id = "quiz-answer-text-wrapper";
newAnswerInput = document.createElement("input");
newAnswerInput.type = "radio";
newAnswerInput.name = "answer";
inputs.push(newAnswerInput);
newAnswerText = document.createElement("label");
newAnswerText.htmlFor = "quizzer";
newAnswerText.innerHTML = questions[i].question.question_answers[j].answer.text;
newAnswerTextWrapper.appendChild(newAnswerInput);
newAnswerTextWrapper.appendChild(newAnswerText);
newAnswer.appendChild(newAnswerTextWrapper);
answers.push(newAnswer);
newAnswerForm.appendChild(newAnswer);
}
newQuestion = document.createElement("div");
newQuestion.className = "quiz-question";
newQuestion.appendChild(newQuestionTextWrapper);
newQuestion.appendChild(newAnswerForm);
newQuizWrapper.appendChild(newQuestion);
}
quiz_div.appendChild(newQuizWrapper);
},
//Checks all of the inputs to see if the
checkInputs = function checkInputs() {
var c = 0;
for (var i = 0; i < inputs.length; i++) {
if (inputs[i].checked) {
userAnswers.push(inputs[i].parentNode.parentNode.dataset.quizvalue);
c++;
}
}
if (c==questions.length) {
calcResult();
}
},
calcResult = function calcResult() {
var highest = 0;
for (var i = 0; i < results.length; i++) {
results[i].countof = 0;
for (var j = 0; j < userAnswers.length; j++) {
if (userAnswers[j] == results[i].result.id) {
results[i].countof++;
}
}
if (results[i].countof > highest) {
highest = results[i].countof;
highest_score = results[i];
}
}
//disable the inputs after the quiz is finished
writeResult();
disableAnswers();
},
writeResult = function writeResult() {
newResult = document.createElement("div");
//append html to render (quiz result)
...;
quiz_div.appendChild(newResult);
},
updateSelectedAnswer = function updateSelectedAnswer(element) {
element.children.namedItem("quiz-answer-text-wrapper").firstChild.checked = true;
for (var i = 0; i < element.parentNode.children.length; i++) {
if (element.parentNode.children.item(i).hasClass("selected")) {
element.parentNode.children.item(i).removeClass("selected");
}
}
element.className = element.className + " selected";
},
addClickEvents = function addClickEvents() {
var onAnswerClick = function onAnswerClick() {
if (!this.hasAttribute("disabled")) {
updateSelectedAnswer(this);
checkInputs();
}
};
for (var i = 0; i < answers.length; i++) {
answers[i].addEventListener("click", onAnswerClick);
}
},
disableAnswers = function disableAnswers() {
for (var q = 0; q < answers.length; q++) {
answers[q].disabled = true;
answers[q].setAttribute("disabled", true);
answers[q].className = answers[q].className + " disabled";
}
};
return {
init: function (json_data) {
getQuizCanvas();
getJSONData(json_data);
writeQuiz();
addClickEvents();
}
};
}();
BF_QUIZ.quizLoader = function () {
"use strict";
var json_data, request,
loadQuizJSON = function loadQuizJSON(json_url) {
request = new XMLHttpRequest();
request.open("GET", json_url, false);
request.onload = function() {
if (request.status >= 200 && request.status < 400) {
// Success!
json_data = JSON.parse(request.responseText);
} else {
// We reached our target server, but it returned an error
}
};
request.onerror = function() {
// There was a connection error of some sort
};
request.send();
};
return {
init: function(json_url) {
loadQuizJSON(json_url);
BF_QUIZ.quiz.init(json_data);
}
};
}();
答案 0 :(得分：2)
如果您尝试在移动设备上查看控制台日志，您可能会注意到有一个JavaScript错误，因为iOS Safari比您使用的桌面浏览器更不宽容。特别是在style模式下将HTMLElement strict属性设置为字符串是非法的。您可以在https://developer.mozilla.org/en/docs/Web/API/HTMLElement/style看到正确设置方法的示例。如果您解决了这个问题，代码似乎也适用于Mobile Safari。
P.S。请注意，您的问题中的违规代码 缺失 ，并且仅在plunker上的writeResult的完整代码中可见。这就是提供a Minimal, Complete, and Verifiable example
答案 1 :(得分：1)
从您的plunker，如果您将第152行的代码从newResultTitle.style = "color:rgba(238,62,52,.99);";更新为newResultTitle.style.color = "rgba(238,62,52,.99)";，这将使其适用于移动浏览器。
HTMLElement.style重新运行只读属性，桌面浏览器在您尝试为其分配值时忽略它，并且移动浏览器会抛出错误。
https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/style