Javascript 如何创建一个div,并根据一个不断变化的变量给它一个ID?
我在做测验。用户决定要回答多少问题 然后,一个函数获取这个数字并运行一个循环,为每个问题生成一个单独的问题div。测验显示一个汉字,用户必须选择正确的翻译 我的代码:Javascript 如何创建一个div,并根据一个不断变化的变量给它一个ID?,javascript,jquery,Javascript,Jquery,我在做测验。用户决定要回答多少问题 然后,一个函数获取这个数字并运行一个循环,为每个问题生成一个单独的问题div。测验显示一个汉字,用户必须选择正确的翻译 我的代码: var fillInQuestion = function() { questionDivIdHTML = 'question' + questionNum; /**************************************** How do I make this Div's ID = t
var fillInQuestion = function() {
questionDivIdHTML = 'question' + questionNum;
/****************************************
How do I make this Div's ID = to questionDivIdHTML?
// Creates question div
$('#questionArea').append("<div class='questionDiv'></div>");
//$('#questionArea:last-child').attr("id", questionDivIdHTML); <-- NOT WORKING
***************************************/
// Sets up a choice bank.
var choices = [];
// choices will be chosen from this.
var tempAnswerSet = allChoices.slice(0);
//find random item in the database for the question
var thisQuestion = allQuestions[Math.floor(Math.random() * allQuestions.length)];
// add that item to choices
choices.push(thisQuestion);
// remove item from 'database' so it cannot be used in another question
allQuestions.splice(allQuestions.indexOf(thisQuestion), 1);
// remove item from tempAnswer set so it can only be one choice
tempAnswerSet.splice(tempAnswerSet.indexOf(thisQuestion), 1);
// add three more items from the database (incorrect items)
var i = 3;
for (i; i > 0; i--) {
var addChoice = tempAnswerSet[Math.floor(Math.random() * tempAnswerSet.length)];
choices.push(addChoice);
// remove the one selected each time so they cant be chosen again
tempAnswerSet.splice(tempAnswerSet.indexOf(addChoice), 1);
//console.log("choices length: " + choices.length);
}
// shuffle the array
choices.shuffle();
// fill in the div with choices.
$('#questionDivIdHTML').append("Here is an question prompt:" + thisQuestion.english + " <br>");
$('questionDivIdHTMLwithHash').append("<input type='radio' name='question<script>questionNum</script>Choice' value='<script>choices[0].hanyu</script>'></input>" + choices[0].hanyu + "<br>");
$('questionDivIdHTMLwithHash').append("<input type='radio' name='question<script>questionNum</script>Choice' value='<script>choices[1].hanyu</script>'></input> " + choices[1].hanyu + "<br>");
$('questionDivIdHTMLwithHash').append("<input type='radio' name='question<script>questionNum</script>Choice' value='<script>choices[2].hanyu</script>'></input> " + choices[2].hanyu + "<br>");
$('questionDivIdHTMLwithHash').append("<input type='radio' name='question<script>questionNum</script>Choice' value='<script>choices[3].hanyu</script>'></input> " + choices[3].hanyu + "<br>");
};
var fillOutQuiz = function() {
for (questionAmount; questionAmount > 0; questionAmount--) {
fillInQuestion();
questionNum += 1;
}
};
var fillInQuestion=function(){
questionDivIdHTML='question'+questionNum;
/****************************************
如何将此Div的ID=设置为questionDivIdHTML?
//创建问题div
$(“#问题区”)。追加(“”);
//$('#questionArea:last child').attr(“id”,questionDivIdHTML);0;i--){
var addChoice=tempAnswerSet[Math.floor(Math.random()*tempAnswerSet.length)];
选择。推送(addChoice);
//删除每次选中的一个,以便不能再次选择它们
tempAnswerSet.splice(tempAnswerSet.indexOf(addChoice),1);
//log(“选项长度:+choices.length”);
}
//洗牌
选项。shuffle();
//在div中填入选项。
$('#questionDivIdHTML').append(“这是一个问题提示:“+thisQuestion.english+”
”);
$('questionDivIdHTMLwithHash')。追加(“+choices[0]。韩语+”
”;
$('questionDivIdHTMLwithHash')。追加(“+choices[1]。韩语+”
”;
$('questionDivIdHTMLwithHash')。追加(“+choices[2]。韩语+”
”;
$('questionDivIdHTMLwithHash')。追加(“+choices[3]。韩语+”
”;
};
var filloutquick=函数(){
对于(questionAmount;questionAmount>0;questionAmount--){
填写问题();
问题数+=1;
}
};
我已经让这段代码正常工作了,但在尝试添加动态ID并循环它时,我破坏了它。您是说这段代码不起作用:
$('#questionArea').append("<div class='questionDiv'></div>");
$('#questionArea:last-child').attr("id", questionDivIdHTML);
或者更好,您可以像这样重新排列代码:
$("<div class='questionDiv'></div>")
.attr("id", questionDivIdHTML)
.appendTo("#questionArea");
$(“”)
.attr(“id”,questionDivIdHTML)
.附于(“#问题区”);
选择id=questionArea的元素,该元素也是其父元素的最后一个子元素#questionArea:last child
选择id=questionArea的元素的最后一个子元素#questionArea>:最后一个子元素
$("<div class='questionDiv'></div>")
.attr("id", questionDivIdHTML)
.appendTo("#questionArea");