为什么myArray不打印到innerHTML或console.log？
[英]Why doesn't myArray print to innerHTML or console.log?
问题描述
Undoubtedly this is javascript 101, but why doesn't myArray print to innerHTML or console.log? 
毫无疑问，这是javascript 101，但是为什么myArray不打印到innerHTML或console.log？ I want a user to input something, and then for it to appear in the id="item" div. 我希望用户输入一些内容，然后使其出现在id =“ item” div中。 What am I doing wrong? 我究竟做错了什么？
<div id="item">X</div>
<input id="task"><button id="add">Add</button>
var task = document.getElementById('task').value;
myArray = [];
myArray.push(task);
document.getElementById('item').innerHTML = myArray;
console.log(myArray);
4 个解决方案
解决方案1
0 已采纳 2016-06-01 12:35:08
Just add an onclick event on the add button. 只需在add按钮上添加一个onclick事件。 so the script knows when to do run the function. 因此脚本知道何时运行该函数。 Because at the moment the script won't get called so it wont submit anything because it doesn't call up anything and wont run anything. 因为此刻脚本不会被调用，所以它不会提交任何内容，因为它不会调用任何内容并且不会运行任何内容。
Javascript fiddle Javascript 小提琴
document.getElementById('add').addEventListener('click', function() { var task = document.getElementById('task').value; myArray = []; myArray.push(task); document.getElementById('item').innerHTML = myArray; });
<div id="item">X</div> <input id="task"><button id="add">Add</button>
$('#add').on('click', function(){ var task = document.getElementById('task').value; myArray = []; myArray.push(task); document.getElementById('item').innerHTML = myArray; console.log(myArray); });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script> <div id="item">X</div> <input id="task"><button id="add">Add</button>
解决方案2
0 2016-06-01 12:35:12
var button = document.getElementById('add'); myArray = []; button.addEventListener('click', function() { myArray.push(document.getElementById('task').value); document.getElementById('item').innerHTML = myArray; console.log(myArray); }, false);
<div id="item">X</div> <input id="task"><button id="add">Add</button>
解决方案3
0 2016-06-01 12:35:44
You want to create the function. 您要创建函数。 And trigger the function on every clicking 并在每次点击时触发功能
<div id="item">X</div>
<input id="task"><button id="add" onclick="add()">Add</button>
Js s
var myArray = [];
add =function ()
{
var task = document.getElementById('task').value;
myArray.push(task);
alert(myArray);
}
解决方案4
0 2016-06-01 12:39:07
use this code : 使用此代码：
<html>
<body>
<div id="item">X</div>
<input type="text" id="task"><button id="add" onclick="addText()">Add</button>
<script>
var myArray =[];
function addText() {
var task = document.getElementById('task').value;
myArray.push(task);
document.getElementById('item').innerHTML = myArray;
console.log(myArray);
}
</script>
</body>
</html>
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