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javascript - 调用 ajax 或放置静态 JSON 时,下拉列表未显示在我的 HTML 表中

转载 作者:太空狗 更新时间:2023-10-29 14:17:07 24 4
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我有一个带有下拉菜单的 HTML 表格。我正在做的是点击一个按钮。我正在显示具有下拉菜单的 HTML 表格,但我面临的问题是一个错误:

TypeError: t is null; can't access its "setAttribute" property

我正在使用 Bootstrap4 下拉菜单。

这是我的代码:

var currentlyClickedOutlet="";
$(document).ready(function() {
$('#button').click(function() {

var data = [{
"amount": 476426,
"billdate": "2018-09-01",
"outlet": "JAYANAGAR"
},
{
"amount": 92141,
"billdate": "2018-09-01",
"outlet": "MALLESHWARAM"
},
{
"amount": 115313,
"billdate": "2018-09-01",
"outlet": "KOLAR"
},
{
"amount": 511153,
"billdate": "2018-09-02",
"outlet": "JAYANAGAR"
},
{
"amount": 115704,
"billdate": "2018-09-02",
"outlet": "MALLESHWARAM"
},
{
"amount": 83597,
"billdate": "2018-09-02",
"outlet": "KOLAR"
},
{
"amount": 167421,
"billdate": "2018-09-03",
"outlet": "JAYANAGAR"
},
{
"amount": 53775,
"billdate": "2018-09-03",
"outlet": "KOLAR"
},
{
"amount": 269712,
"billdate": "2018-09-04",
"outlet": "JAYANAGAR"
},
{
"amount": 58850,
"billdate": "2018-09-04",
"outlet": "MALLESHWARAM"
},
{
"amount": 82999,
"billdate": "2018-09-04",
"outlet": "KOLAR"
}
]





let formatData = function(data) {

let billdates = [];
let outlets = [];
data.forEach(element => {
if (billdates.indexOf(element.billdate) == -1) {
billdates.push(element.billdate);
}
if (outlets.indexOf(element.outlet) == -1) {
outlets.push(element.outlet);
}
});
return {
data: data,
billdates: billdates,
outlets: outlets,

};
};



let renderTable = function(data, divId, filterdata) {
billdates = data.billdates;
outlets = data.outlets;
data = data.data;
let tbl = document.getElementById(divId);
let table = document.createElement("table");
let thead = document.createElement("thead");
let headerRow = document.createElement("tr");
let th = document.createElement("th");
th.innerHTML = "Bill_____Date";
th.classList.add("text-center");
headerRow.appendChild(th);
let grandTotal = 0;
let outletWiseTotal = {};
th = document.createElement("th");
th.innerHTML = "Total1";
th.classList.add("text-center");
headerRow.appendChild(th);

outlets.forEach(element => {
th = document.createElement("th");
th.innerHTML = element;
th.classList.add("text-center");
headerRow.appendChild(th);
outletWiseTotal[element] = 0;
data.forEach(el => {
if (el.outlet == element) {
outletWiseTotal[element] += parseInt(el.amount);
}
});
grandTotal += outletWiseTotal[element];
});


thead.appendChild(headerRow);
headerRow = document.createElement("tr");
th = document.createElement("th");
th.innerHTML = "Total";
th.classList.add("text-center");

headerRow.appendChild(th);

outlets.forEach(element => {
th = document.createElement("th");
th.innerHTML = outletWiseTotal[element];
th.classList.add("text-right");
headerRow.appendChild(th);
});

th = document.createElement("th");
th.innerHTML = grandTotal;
th.classList.add("text-right"); // grand total

headerRow.insertBefore(th, headerRow.children[1]);
thead.appendChild(headerRow);
table.appendChild(thead);

let tbody = document.createElement("tbody");

billdates.forEach(element => {
let row = document.createElement("tr");
td = document.createElement("td");
td.innerHTML = element;
row.appendChild(td);
let total = 0;

outlets.forEach(outlet => {
let el = 0;
data.forEach(d => {
if (d.billdate == element && d.outlet == outlet) {
total += parseInt(d.amount);
el = d.amount;
}
});




td = document.createElement("td");
a = document.createElement("a");

td.classList.add("text-right");
td.classList.add("dropdown");
a.classList.add("btn");
a.classList.add("btn-secondary");
a.classList.add("actionButton");
a.classList.add("btn");
a.classList.add("btn-secondary");
a.classList.add("dropdown-toggle");
a.classList.add("dropdown-toggle-split");

a.setAttribute("data-place", outlet); /* this one to get which column is clicked*/
/* a.classList.add("text-center"); */
a.setAttribute("data-toggle", "dropdown");
a.innerHTML = el;
td.appendChild(a);

row.appendChild(td);




});


td = document.createElement("td");
td.innerHTML = total;
td.classList.add("text-right");

row.insertBefore(td, row.children[1]);
tbody.appendChild(row);

});

table.appendChild(tbody);

tbl.innerHTML = "";
tbl.appendChild(table);
table.classList.add("table");
table.classList.add("table-striped");
table.classList.add("table-bordered");
table.classList.add("table-hover");
}
let formatedData = formatData(data);
renderTable(formatedData, 'tbl', '');

$dropdown = $("#contextMenu");
$(".actionButton").click(function() {
//move dropdown menu
$(this).after($dropdown);
//update links
$(this).dropdown();

currentlyClickedOutlet = $(this).attr("data-place"); /* which column header is clicked (JAYANAGAR,MALLESHWARAM,KOLAR) */
console.log(currentlyClickedOutlet)


});
});
});
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>

<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js"></script>
<button id="button" class="btn btn-default" type="submit">Search</button>

<div id="tbl"></div>

<div class="dropdown-menu" id="contextMenu">
<a class="dropdown-item" href="#">Link 1</a>
<a class="dropdown-item" href="#">Link 2</a>
</div>

我不知道我哪里错了。

最佳答案

.contextMenuclick 事件在类contextMenu 的任何元素可用之前定义。

将以下代码向下移动应该可以解决问题

$dropdown = $("#contextMenu");
$(".actionButton").click(function() {
//move dropdown menu
$(this).after($dropdown);
//update links
$(this).dropdown();
});

最终代码如下所示。

$(document).ready(function() {
$('#button').click(function() {

var data = [{
"amount": 476426,
"billdate": "2018-09-01",
"outlet": "JAYANAGAR"
},
{
"amount": 92141,
"billdate": "2018-09-01",
"outlet": "MALLESHWARAM"
},
{
"amount": 115313,
"billdate": "2018-09-01",
"outlet": "KOLAR"
},
{
"amount": 511153,
"billdate": "2018-09-02",
"outlet": "JAYANAGAR"
},
{
"amount": 115704,
"billdate": "2018-09-02",
"outlet": "MALLESHWARAM"
},
{
"amount": 83597,
"billdate": "2018-09-02",
"outlet": "KOLAR"
},
{
"amount": 167421,
"billdate": "2018-09-03",
"outlet": "JAYANAGAR"
},
{
"amount": 53775,
"billdate": "2018-09-03",
"outlet": "KOLAR"
},
{
"amount": 269712,
"billdate": "2018-09-04",
"outlet": "JAYANAGAR"
},
{
"amount": 58850,
"billdate": "2018-09-04",
"outlet": "MALLESHWARAM"
},
{
"amount": 82999,
"billdate": "2018-09-04",
"outlet": "KOLAR"
}
]


let formatData = function(data) {

let billdates = [];
let outlets = [];
data.forEach(element => {
if (billdates.indexOf(element.billdate) == -1) {
billdates.push(element.billdate);
}
if (outlets.indexOf(element.outlet) == -1) {
outlets.push(element.outlet);
}
});
return {
data: data,
billdates: billdates,
outlets: outlets,

};
};



let renderTable = function(data, divId, filterdata) {
billdates = data.billdates;
outlets = data.outlets;
data = data.data;
let tbl = document.getElementById(divId);
let table = document.createElement("table");
let thead = document.createElement("thead");
let headerRow = document.createElement("tr");
let th = document.createElement("th");
th.innerHTML = "Bill_____Date";
th.classList.add("text-center");
headerRow.appendChild(th);
let grandTotal = 0;
let outletWiseTotal = {};
th = document.createElement("th");
th.innerHTML = "Total1";
th.classList.add("text-center");
headerRow.appendChild(th);

outlets.forEach(element => {
th = document.createElement("th");
th.innerHTML = element;
th.classList.add("text-center");
headerRow.appendChild(th);
outletWiseTotal[element] = 0;
data.forEach(el => {
if (el.outlet == element) {
outletWiseTotal[element] += parseInt(el.amount);
}
});
grandTotal += outletWiseTotal[element];
});


thead.appendChild(headerRow);
headerRow = document.createElement("tr");
th = document.createElement("th");
th.innerHTML = "Total";
th.classList.add("text-center");

headerRow.appendChild(th);

outlets.forEach(element => {
th = document.createElement("th");
th.innerHTML = outletWiseTotal[element];
th.classList.add("text-right");
headerRow.appendChild(th);
});

th = document.createElement("th");
th.innerHTML = grandTotal;
th.classList.add("text-right"); // grand total

headerRow.insertBefore(th, headerRow.children[1]);
thead.appendChild(headerRow);
table.appendChild(thead);

let tbody = document.createElement("tbody");

billdates.forEach(element => {
let row = document.createElement("tr");
td = document.createElement("td");
td.innerHTML = element;
row.appendChild(td);
let total = 0;

outlets.forEach(outlet => {
let el = 0;
data.forEach(d => {
if (d.billdate == element && d.outlet == outlet) {
total += parseInt(d.amount);
el = d.amount;
}
});




td = document.createElement("td");
a = document.createElement("a");

td.classList.add("text-right");
td.classList.add("dropdown");
a.classList.add("btn");
a.classList.add("btn-secondary");
a.classList.add("actionButton");
a.classList.add("btn");
a.classList.add("btn-secondary");
a.classList.add("dropdown-toggle");
a.classList.add("dropdown-toggle-split");


/* a.classList.add("text-center"); */
a.setAttribute("data-toggle", "dropdown");
a.innerHTML = el;
td.appendChild(a);

row.appendChild(td);




});


td = document.createElement("td");
td.innerHTML = total;
td.classList.add("text-right");

row.insertBefore(td, row.children[1]);
tbody.appendChild(row);

});

table.appendChild(tbody);

tbl.innerHTML = "";
tbl.appendChild(table);
table.classList.add("table");
table.classList.add("table-striped");
table.classList.add("table-bordered");
table.classList.add("table-hover");
}
let formatedData = formatData(data);
renderTable(formatedData, 'tbl', '');

$dropdown = $("#contextMenu");
$(".actionButton").click(function() {
//move dropdown menu
$(this).after($dropdown);
//update links
$(this).dropdown();
});
});
});
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js"></script>

<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/js/bootstrap.min.js"></script>
<button id="button" class="btn btn-default" type="submit">Search</button>

<div id="tbl"></div>

<div class="dropdown-menu" id="contextMenu">
<a class="dropdown-item" href="#">Link 1</a>
<a class="dropdown-item" href="#">Link 2</a>
</div>

关于javascript - 调用 ajax 或放置静态 JSON 时,下拉列表未显示在我的 HTML 表中,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53670094/

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