如何将值从 JavaScript 中的函数返回到 HTML 中的文本框
[英]How do I return a value from a function in JavaScript to a textbox in HTML
问题描述
This is my HTML code:
这是我的 HTML 代码：
<head>
</head>
<body>
LIMIT<input id='limit' name='' value='' class=''>
<button id='go' class=''>GO</button>
TOTAL<input id='total' name='' value='' class=''>
<script src='js/limitfor.js'></script>
</body>
And this is my JavaScript:这是我的 JavaScript：
document.getElementById('go').onclick = function () {
var limit = document.getElementById('limit').value;
limit = parseFloat(limit);
total = 0;
for (i=0; i<=limit ;i++) {
total = total + i;
};
};
If I alert the total, I can see that the function works, but I need the total to be in the textbox rather than in a pop up alert.如果我提醒总数，我可以看到该功能有效，但我需要总数在文本框中而不是在弹出警报中。
4 个解决方案
解决方案1
3 已采纳 2015-02-19 05:10:20
您将需要设置输入元素的value ：
document.getElementById("total").value = total;
解决方案2
2 2015-02-19 05:13:12
首先选择表单中的特定元素（即总文本字段），然后使用赋值运算符'='设置其值
document.getElementById("total").value=total;
解决方案3
0 2015-02-19 05:12:35
Just assign the value in total text box after your for loop is completed for循环完成后，只需在总文本框中分配值即可
var limit = document.getElementById('limit').value;
limit = parseFloat(limit);
total = 0;
for (i=0; i<=limit ;i++) {
total = total + i;
};
document.getElementById("total").value = total;
};
解决方案4
0 2021-11-09 19:36:53
use document.getElementById(put id of the text area where you want to output your answer or result).value = answer(whatever is your answer or result you want to reflect in textbox or textarea)使用document.getElementById(put id of the text area where you want to output your answer or result).value = answer(whatever is your answer or result you want to reflect in textbox or textarea)
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