我正在尝试使用document.getElementById访问动态生成的DIV,但是获取不能将属性innerHTML设置为null,这很明显。
基本上我正在尝试构建一种类似于https://www.typeform.com/
的交互式表单我想为每个问题创建单独的DIV。
这是我到目前为止所做的:
的index.html
<!DOCTYPE html>
<html>
<head>
<title>Interactive Forms</title>
<script src="script.js"></script>
</head>
<body>
<center>
<div id="playArea">
<h3>Hello Stranger! Let's start</h3> <br/>
<button id="start" onclick="Questions()">Let's start</button><span>or Hit Enter</span>
</div>
</center>
</body>
</html>
的script.js
var questions = [
"Hey, what's you name?",
"Can I know your E-mail ID please?",
"Would you also like to subscribe to the newsletter?"
];
var html = "";
var i =0;
addEventListener("keydown", function(event){
if(event.keyCode==13){
Question();
}
if(event.code==39){
nextQuestion();
}
});
function Question(){
html = questions[0]+"<br>"+"<input type='text' class='answer'><button onclick='nextQuestion()'>Ok</button><span>or Hit Right Arrow</span><br>";
document.body.innerHTML = html;
// document.getElementById("playArea").innerHTML = html;
i++;
}
function nextQuestion(){
if(i<questions.length){
var html2 = "";
newDiv = document.createElement("div");
check="'answer"+i+"'";
console.log("'answer"+i+"'");
newDiv.setAttribute("id", "'answer"+i+"'");
console.log(newDiv.id);
html2 = questions[i]+"<br><input type='text' id='answer'><button onclick='nextQuestion()'>Ok</button><span>or Hit Right Arrow</span><br>";
newDiv.innerHTML = html2;
oQ = document.getElementById("otherQuestions");
document.body.insertBefore(newDiv, oQ);
i++;
}
else{
document.body.innerHTML = "Thank you for the response";
}
}
答案 0 :(得分:2)
document.getElementById
通过其ID 从文档获取一个元素。
您尚未将div添加到文档中,因此无法找到它。
那说你已经有了元素!没有必要在文档或其他任何地方搜索它。
newDiv.innerHTML = html2;