var tableBody = document.getElementById("firstTableBody"),
secondTable = document.getElementById("secondTable");
function insertRow() {
var Row = tableBody.insertRow();
for (var c = 0; c < 3; c += 1) {
Row.insertCell(c);
}
var Fruits = ["Apples", "Oranges", "Strawberries"],
random_Fruits = Fruits[Math.floor(Math.random() * Fruits.length)];
Row.cells[0].innerHTML = random_Fruits;
Row.cells[1].innerHTML = 100;
var Sellbtn = document.createElement('button');
Sellbtn.innerHTML = "Sell"
Sellbtn.onclick = function Sell() {
if (secondTable.rows.length < 1) {
var Row = secondTable.insertRow();
for (var f = 0; f < 2; f += 1) {
Row.insertCell(f);
}
Row.cells[0].innerHTML = this.parentNode.parentNode.cells[0].innerHTML;
Row.cells[1].innerHTML = this.parentNode.parentNode.cells[1].innerHTML;
} else {
for (var i = 0; i < secondTable.rows.length; i += 1) {
if (secondTable.rows[i].cells[0].innerHTML === this.parentNode.parentNode.cells[0].innerHTML) {
secondTable.rows[i].cells[1].innerHTML = +this.parentNode.parentNode.cells[1].innerHTML;
} else {
var Rowz = secondTable.insertRow();
for (var k = 0; k < 4; k += 1) {
Rowz.insertCell(k);
}
Rowz.cells[0].innerHTML = this.parentNode.parentNode.cells[0].innerHTML;
Rowz.cells[1].innerHTML = this.parentNode.parentNode.cells[1].innerHTML;
}
}
}
}
Row.cells[2].appendChild(Sellbtn);
};<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<body>
<table border="1">
<thead>
<th>Item</th>
<th>Sold</th>
<th>
<button onclick="insertRow()">Insert</button>
</th>
</thead>
<tbody id="firstTableBody">
</tbody>
</table>
<table border="1">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="secondTable">
</tbody>
</table>
</body>我插入带有随机插入的水果名称的行，并动态添加一个名为Sell的按钮。当我单击“卖出”时，应检查第二行表中是否存在该行的水果名称，然后将卖出金额添加到第二张表中具有相同名称的行中。如果不是，那么只需在第二个表中添加名称和已售金额的新行。 jQuery还可以。
最佳答案
这是一个可能的解决方案，代替您的函数Sell（）
Sellbtn.onclick = function Sell() {
var found = false,
rows = secondTable.rows,
numrows = rows.length,
tofind = this.parentNode.parentNode.cells[0].innerHTML,
foundin,
numToAdd = parseInt(this.parentNode.parentNode.cells[1].innerHTML),
num,
x;
for(x=0;x<numrows;x++){
if(rows[x].cells[0].innerHTML === tofind){
found = true;
foundin = x;
}
}
if(found){
num = parseInt(rows[foundin].cells[1].innerHTML) + numToAdd;
rows[foundin].cells[1].innerHTML = num;
}
else{
var Row = secondTable.insertRow();
for (var f = 0; f < 2; f += 1) {
Row.insertCell(f);
}
Row.cells[0].innerHTML = this.parentNode.parentNode.cells[0].innerHTML;
Row.cells[1].innerHTML = this.parentNode.parentNode.cells[1].innerHTML;
}
}
关于javascript - 循环遍历html单元格，并在满足条件的情况下执行功能，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/28092247/