[英]Howto copy a whole div to another div when javascript is triggered in the div
[英]Javascript times the contents of div A with div B and display in div C (triggered when div A is changed)
我需要的是监听 div "qty_a-row" 的变化,然后将 div "qty_a-row" 的值与 div "price-a-row" 的值相乘,并将答案放在 div "sub-total-一排”
这是我尝试过的..
<div id="qty-a-row" contenteditable='true'></div><br>
<div id="price-a-row" contenteditable='true'></div><br>
<div id="sub-total-a-row" contenteditable='true'></div>
var contents = $(".qty-a-row").html();
$(".qty-a-row").blur(function () {
if (contents != $(this).html()) {
var x = parseInt(document.getElementById("qty-a-row").value);
var y = parseInt(document.getElementById("price-a-row").value);
document.getElementById("sub-total-a-row").innerText = (x * y);
}
});
为了测试,我在 div“price-a-row”中输入一个值,然后输入一个数量,结果应该显示,但现在显示。
您正在使用 jQuery,但您没有将其包含在页面中,这就是您收到ReferenceError: $ is not defined
您正在使用类选择器为 blur 事件选择 div .
用于类#
用于 id
Div 没有value
属性,您必须使用textContent
来获取数字
var contents = $("#qty-a-row").html(); $("#qty-a-row").blur(function () { if (contents != $(this).html()) { var x = parseInt(document.getElementById("qty-a-row").textContent); var y = parseInt(document.getElementById("price-a-row").textContent); document.getElementById("sub-total-a-row").textContent = (x * y); } });
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <div id="qty-a-row" contenteditable='true'>2</div><br> <div id="price-a-row" contenteditable='true'>1.00</div><br> <div id="sub-total-a-row" contenteditable='true'></div>
有关没有 jQuery 的版本,请参见下文
var contents = document.getElementById("qty-a-row").innerHTML; document.getElementById("qty-a-row").addEventListener('blur', function () { if (contents != this.innerHTML) { var x = parseInt(document.getElementById("qty-a-row").textContent); var y = parseInt(document.getElementById("price-a-row").textContent); document.getElementById("sub-total-a-row").textContent = (x * y); } });
<div id="qty-a-row" contenteditable='true'>2</div><br> <div id="price-a-row" contenteditable='true'>1.00</div><br> <div id="sub-total-a-row" contenteditable='true'></div>
制作 div 输入并使用 value 属性,修复 jquery 选择器修复事件绑定语法删除 if 条件,真的不知道那是什么
<input id="qty-a-row" contenteditable="true" value="2" /><br />
<input id="price-a-row" contenteditable="true" value="1.00" /><br />
<div id="sub-total-a-row" contenteditable="true"></div>
$("#qty-a-row, #price-a-row").on('change', function () {
var x = parseInt(document.getElementById("qty-a-row").value);
var y = parseInt(document.getElementById("price-a-row").value);
document.getElementById("sub-total-a-row").innerText = (x * y);
});
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