我无法使用onchange工作,并通过文本框将数字存储在数组中.
我想要的代码是获取输入到文本框中的数字的统计信息.我这样做是让用户在文本框中输入数字,然后按Enter键显示这些数字.在将数字放入列表以显示输入的数字之前,应将数字放入数组中.但是,当按下Enter键或单击文本框时,我不会触发onchange时出现此错误.
Here is an image of the error I am getting when inspecting the code
随着数字中存储的数字,我想尝试获得数字的均值.但是,我不断收到错误“NaN”,这让我觉得我的数字没有正确存储到数组中.
这是代码：
<html>
<head>
<title>Stats</title>
</head>
<p>Array is called numbers. numbers.sort();</p>
<div id="stats">
<input type ="text" id="value" onchange="list()"> <!-- Getting the Onchange Error here -->
<button id="button1" onclick = "list()">Enter</button>
<ul id="list1">
</ul>
<button id="stat_button" onclick="calculateMean()">Get Statistics</button>
<p id="mean">Mean= </p>
</div>
<script>
function list() {
var liElement = document.createElement("li"); //Creating new list element//
var ulElement = document.getElementById("list1"); //Get the ulElement//
var input = document.getElementById("value").value; //Get the text from the text box//
var numbers = []; //create Array called numbers
numbers.push(input);//adds new items to the array
//for loop//
for(var i=0; i < numbers.length; i++) {
liElement.innerHTML = numbers[0]; //Puts the array into the list for display//
ulElement.appendChild(liElement); //add new li element to ul element//
}
}
function calculateMean() {
var meanTotal = 0;
var meanAverage = 0;
var meanArray = [];
for (var i = 0; i < meanArray.length; i++) {
meanTotal += meanArray[i];
}
meanAverage = (meanTotal / meanArray.length);
document.getElementById("mean").innerHTML = meanAverage;
}
</script>
解决方法:
尝试通过addEventListener添加它,而不是像这样内联：
document.getElementById('value').addEventListener('change', function(e){
list()
})