我有一个功能可以遍历项目及其数量并对其进行排序,并且应该将它们显示在表格中。
DOM 或浏览器中没有显示任何内容。是我调用的函数有误还是什么?
我有一个使用脚本链接到我的 index.js 文件的 index.html 文件。
chrome 开发工具中没有显示任何错误。
说明
通过调用以下方法显示货架和元素配对
function displayShelfItemPair(shelfName, itemName);
function main() {
let yesterdaysOrders = [
{
id: 1,
orderLines: [{
itemName: "Item 01",
quantity: 1
},
{
itemName: "Item 02",
quantity: 3
},
{
itemName: "Item 03",
quantity: 25
},
{
itemName: "Item 04",
quantity: 12
},
],
},
{
id: 2,
orderLines: [{
itemName: "Item 01",
quantity: 1
},
{
itemName: "Item 08",
quantity: 42
},
{
itemName: "Item 09",
quantity: 13
},
{
itemName: "Item 12",
quantity: 37
},
],
},
{
id: 3,
orderLines: [{
itemName: "Item 12",
quantity: 16
}, ],
},
{
id: 4,
orderLines: [{
itemName: "Item 10",
quantity: 11
},
{
itemName: "Item 11",
quantity: 10
},
],
},
{
id: 5,
orderLines: [{
itemName: "Item 06",
quantity: 7
},
{
itemName: "Item 07",
quantity: 2
},
{
itemName: "Item 12",
quantity: 14
},
],
},
{
id: 6,
orderLines: [{
itemName: "Item 05",
quantity: 17
}, ],
},
{
id: 7,
orderLines: [{
itemName: "Item 03",
quantity: 5
},
{
itemName: "Item 07",
quantity: 2
},
],
},
{
id: 8,
orderLines: [{
itemName: "Item 02",
quantity: 13
},
{
itemName: "Item 07",
quantity: 7
},
{
itemName: "Item 09",
quantity: 2
},
],
},
{
id: 9,
orderLines: [{
itemName: "Item 01",
quantity: 4
},
{
itemName: "Item 06",
quantity: 17
},
{
itemName: "Item 07",
quantity: 3
},
],
},
{
id: 10,
orderLines: [{
itemName: "Item 11",
quantity: 12
},
{
itemName: "Item 12",
quantity: 1
},
],
}
],
result = Array.from(
yesterdaysOrders.reduce((acc, {
orderLines
}) => {
orderLines.forEach(({
itemName,
quantity
}) => acc.set(itemName, (acc.get(itemName) || 0) + quantity));
return acc;
}, new Map), ([itemName, quantity]) => ({
itemName,
quantity
}));
result.sort((a, b) => {
if (a.quantity > b.quantity) {
return -1;
} else if (a.quantity < b.quantity) {
return 1;
} else {
return 0;
}
});
function displayShelfItemPair(shelfName, itemName) {
let table = document.createElement('table');
document.body.appendChild(table);
for (let r in row) {
let tr = document.createElement('tr');
table.appendChild(tr); // Append to <table> node
for (let c in cell) {
let tdElement = document.createElement('td');
tdElement.innerHTML = result[i][j];
tr.appendChild(tdElement);
}
}
console.log(displayShelfItemPair(shelfName, itemName));
}
}
main();
期望的输出
ShelfName | itemName (w/quantity)
1 Item 12: 68<br/>
2 ''
'' ''
'' ''
最佳答案
您正在遍历不存在的对象。例如,for (let r in row)
没有row
。我重写了函数,希望能让您更接近。
function main() {
let yesterdaysOrders = [
{
id: 1,
orderLines: [{
itemName: "Item 01",
quantity: 1
},
{
itemName: "Item 02",
quantity: 3
},
{
itemName: "Item 03",
quantity: 25
},
{
itemName: "Item 04",
quantity: 12
},
],
},
{
id: 2,
orderLines: [{
itemName: "Item 01",
quantity: 1
},
{
itemName: "Item 08",
quantity: 42
},
{
itemName: "Item 09",
quantity: 13
},
{
itemName: "Item 12",
quantity: 37
},
],
},
{
id: 3,
orderLines: [{
itemName: "Item 12",
quantity: 16
}, ],
},
{
id: 4,
orderLines: [{
itemName: "Item 10",
quantity: 11
},
{
itemName: "Item 11",
quantity: 10
},
],
},
{
id: 5,
orderLines: [{
itemName: "Item 06",
quantity: 7
},
{
itemName: "Item 07",
quantity: 2
},
{
itemName: "Item 12",
quantity: 14
},
],
},
{
id: 6,
orderLines: [{
itemName: "Item 05",
quantity: 17
}, ],
},
{
id: 7,
orderLines: [{
itemName: "Item 03",
quantity: 5
},
{
itemName: "Item 07",
quantity: 2
},
],
},
{
id: 8,
orderLines: [{
itemName: "Item 02",
quantity: 13
},
{
itemName: "Item 07",
quantity: 7
},
{
itemName: "Item 09",
quantity: 2
},
],
},
{
id: 9,
orderLines: [{
itemName: "Item 01",
quantity: 4
},
{
itemName: "Item 06",
quantity: 17
},
{
itemName: "Item 07",
quantity: 3
},
],
},
{
id: 10,
orderLines: [{
itemName: "Item 11",
quantity: 12
},
{
itemName: "Item 12",
quantity: 1
},
],
}
],
result = Array.from(
yesterdaysOrders.reduce((acc, {
orderLines
}) => {
orderLines.forEach(({
itemName,
quantity
}) => acc.set(itemName, (acc.get(itemName) || 0) + quantity));
return acc;
}, new Map), ([itemName, quantity]) => ({
itemName,
quantity
}));
result.sort((a, b) => {
if (a.quantity > b.quantity) {
return -1;
} else if (a.quantity < b.quantity) {
return 1;
} else {
return 0;
}
});
function displayShelfItemPairs() {
let table = document.createElement('table');
document.body.appendChild(table);
table.innerHTML = "<tr><th>ShelfName</th><th>itemName (w/quantity)</th></tr>"
let shelf = 1;
for (let r of result) {
let tr = document.createElement('tr');
table.appendChild(tr); // Append to <table> node
tr.innerHTML = "<td>" + shelf + "</td><td>" + r.itemName + ": " + r.quantity + "</td>";
shelf++
}
}
displayShelfItemPairs()
}
main();
关于javascript - 动态创建的表 - 仅 Vanilla Javascript - 不在浏览器中显示,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57965004/