I might've overdosed innerHTML and get undefined

I might've overdosed innerHTML and get undefined - javascript

function promptuj() {
this.x = prompt("How big should be your multiplication table?");
document.getElementById("keks").innerHTML = tabliczka(this.x);
}
function tabliczka() {
document.getElementById("keks").innerHTML += "<table border=\"1\">";
for (i = 1; i <= this.x; i++) {
document.getElementById("keks").innerHTML += "<tr><td>" + i + "</td>";
for (j = 1; j <= this.x; j++) {
if (j != 1) {
document.getElementById("keks").innerHTML += "<td>" + j * i + "</td>";
}
}
document.getElementById("keks").innerHTML += "</tr>";
}
document.getElementById("keks").innerHTML += "</table>";
}
<!DOCTYPE html>
<html>
<head>
<title>Demo</title>
<meta charset="utf-8">
</head>
<body>
<input type="button" onclick="promptuj()" value="Promptonto" />
<div id="keks"></div>
</html>
This short thingie is for multiplication table with prompt button, asking how big should it be. But giving it any number returns undefined instead of a table.
Before that I had document.write(whatever) instead of document.getElementById("keks").innerHTML += and it worked.
EDIT: I noticed I didn't close <body> but it didn't help.

You get undefined because in promptuj you set the innerHTML to the value returned by tabliczka. But tabliczka doesn't explicitly return anything, so it's like it returned undefined.
Instead, tabliczka should return the HTML string to be set as the innerHTML.
Moreover, never use .innerHTML +=. Concatenate strings first, and assign innerHTML at the end. If you use .innerHTML = "<table>", the parser will automatically close the table, without waiting for your .innerHTML += "</table>". Then the contents will be inserted outside the table. And not relevant here, but .innerHTML += also removes internal data, e.g. event listeners.
function promptuj() {
var x = prompt("How big should be your multiplication table?");
document.getElementById("keks").innerHTML = tabliczka(x);
}
function tabliczka(x) {
var str = "<table>";
for (var i=1; i<=x; i++) {
str += "<tr>";
for (var j=1; j<=x; j++) {
str += "<td>" + j*i + "</td>";
}
str += "</tr>";
}
str += "</table>";
return str;
}
table {
border-collapse: collapse;
}
td {
text-align: center;
border: 1px solid;
}
<input type="button" onclick="promptuj()" value="Promptonto" />
<div id="keks"></div>

Try something like:
<script type="text/javascript">
function promptuj() {
window.x=prompt("How big should be your multiplication table?");
document.getElementById("keks").innerHTML = tabliczka(window.x);
}
function tabliczka(x) {
var htmlString = "";
htmlString += "<table border=\"1\">";
for (i=1; i<=window.x; i++) {
htmlString += "<tr><td>" + i + "</td>";
for (j=1; j<= x; j++) {
if (j!=1) {
htmlString += "<td>" + j*i + "</td>";
}
}
htmlString += "</tr>";
}
htmlString += "</table>";
return htmlString;
}
</script>
You saw undefined, because your tabliczka function originally returned nothing, so javascript implicitly returned undefined from the call to it (this is how javascript works).
So basically, even if tabliczka was correct, it did the innerHTML changes to your "keks" div and returned so the promptuj function did the final .innerHTML to "keks" with the result of tabliczka which was undefined.
It just happened so fast that you just saw undefined from what I can tell.

Related

How to get information in javascript to appear in html

The below code is supposed to make a shopping cart.However, I am unsure of how I do the conversion from javascript to html (I don't quite know how to describe it, sorry)
I am trying to have javascript build a table that has the values of the items within it, along with buttons to build the shopping cart. I initially was browsing the web to find how to do it, and thought that using document.getElementById().innerhtml would work, and referencing it in the body, however it seems that it is not functioning as intended.
<!DOCTYPE html>
<html>
<head>
<title>
ACME Corp Shopping Cart
</title>
<link rel = "stylesheet" href = "shopstyle.css">
<script type = "text/javascript", language = "javascript">
alert("YAS");
var products = [];
var cart = [];
//label individual products below in individual lists, and then have the product put through the product_setup function
var product1 = ["Anvil", "Premium Grade Iron", 119.99];
var product2 = ["Female Roadrunner Costume", "Guaranteed to attract Male Roadrunners", 54.99];
function product_setup(product){
var productID = product[0];
var product_desc = product[1];
var qty = 1;
var price = product[2];
var newProduct = {
product_id: null,
product_desc: null,
product_qty: 0,
product_price: 0.00,
};
newProduct.product_id = productID;
newProduct.product_desc = product_desc;
newProduct.product_qty = qty;
newProduct.product_price = price;
products.push(newProduct);
}
product_setup(product1);
product_setup(product2);
function product_table() {
var html = "<table border = '1|1' >";
html += "<td>Product Name</td>";
html += "<td>Product Description</td>";
html += "<td>Price</td>";
html += "<td>Add to Cart</td>";
for (var i = 0; i < products.length; i ++) {
html += "<tr>";
html += "<td>" + products[i].product_name + "</td>";
html += "<td>" + products[i].product_desc + "</td>";
html += "<td>" + products[i].product_price + "</td>";
html += "<td>" + <button type = 'submit' onclick = 'addCart(products[i].product_name, this)'>Add to Cart</button> + "</td>";
html += "</tr>";
}
html += "</table>";
document.getElementById("location1").innerHTML = html;
}
product_table();
function addCart(product_id) {
for (var i = 0; i < products.length; i++) {
if (products[i].product_id == product_id) {
var cartItem = null;
for (var k = 0; k < cart.length; k++) {
if (cart[k].product.product_id == products[i].product_id) {
cartItem = cart[k];
cart[k].product_qty++;
break;
}
}
if (cartItem == null) {
cartItem = {
product: products[i],
product_qty: products[i].product_qty
};
cart.push(cartItem);
}
}
}
renderCartTable();
}
function subtractQuantity(product_id)
{
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart[i].product_qty--;
}
if (cart[i].product_qty == 0) {
cart.splice(i,1);
}
}
renderCartTable();
}
function addQuantity(product_id)
{
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart[i].product_qty++;
}
}
renderCartTable();
}
function removeItem(product_id)
{
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart.splice(i,1);
}
}
renderCartTable();
}
function renderCartTable() {
var html = '';
var ele = document.getElementById("location2");
ele.innerHTML = '';
html += "<table id='tblCart' border='1|1'>";
html += "<tr><td>Product ID</td>";
html += "<td>Product Description</td>";
html += "<td>Quantity</td>";
html += "<td>Price</td>";
html += "<td>Total</td>";
html += "<td>Action</td></tr>";
var GrandTotal = 0;
for (var i = 0; i < cart.length; i++) {
html += "<tr>";
html += "<td>" + cart[i].product.product_id + "</td>";
html += "<td>" + cart[i].product.product_desc + "</td>";
html += "<td>" + cart[i].product_qty + "</td>";
html += "<td>" + cart[i].product.product_price + "</td>";
html += "<td>" + parseFloat(cart[i].product.product_price) * parseInt(cart[i].product_qty, 10) + "</td>";
html += "<td><button type='submit' onClick='subtractQuantity(\"" + cart[i].product.product_id + "\", this);'/>Subtract Item</button> &nbsp <button type='submit' onClick='addQuantity(\"" + cart[i].product.product_id + "\", this);'/>Add Item</button> &nbsp<button type='submit' onClick='removeItem(\"" + cart[i].product.product_id + "\", this);'/>Remove Item</button></td>";
html += "</tr>";
GrandTotal += parseFloat(cart[i].product.product_price) * parseInt(cart[i].product_qty, 10);
}
document.getElementById("location3").innerHTML = GrandTotal;
html += "</table>";
ele.innerHTML = html;
}
renderCartTable();
</script>
</head>
<body>
<br>
<p id="location1"> </p>
<br/>
<h2> Shopping Cart </h2>
<p id="location2"> </p>
<h2>Grand Total:</h2>
<p id="location3"> </p>
</body>
</html>

It is always considered the best when you include your <script> tags after <body>. DOM elements that you try to access in your script are usually available only after the entire page has loaded. Your script should start running only after web page's body is created since you're expecting contents to be added to <body>

Updating table in html from javascript

I have been attempting to update a table, which is meant to be a "shopping cart." However, upon pressing the "add to cart button", my table does not update.
The html for the javascript just uses getElementbyId, and both tables appear on the screen when I run the html file.
I'm still fairly new to javascript, so I was hoping someone with more experience could double check for me to see that I have what I need.
var html = "<table border = '1|1' >";
html += "<td>Product Name</td>";
html += "<td>Product Description</td>";
html += "<td>Price</td>";
html += "<td>Add to Cart</td>";
for (var i = 0; i < products.length; i ++) {
html += "<tr>";
html += "<td>" + products[i].product_name + "</td>";
html += "<td>" + products[i].product_desc + "</td>";
html += "<td>" + products[i].product_price + "</td>";
html += "<td>" + <button type = 'submit' onclick = 'addCart(products[i].product_name, this)'>Add to Cart</button> + "</td>";
html += "</tr>";
}
html += "</table>";
document.getElementById("location1").innerHTML = html;
function addCart(product_id) {
for (var i = 0; i < products.length; i++) {
if (products[i].product_id == product_id) {
var cartItem = null;
for (var k = 0; k < cart.length; k++) {
if (cart[k].product.product_id == products[i].product_id) {
cartItem = cart[k];
cart[k].product_qty++;
break;
}
}
if (cartItem == null) {
var cartItem = {
product: products[i],
product_qty: products[i].product_qty
};
cart.push(cartItem);
}
}
}
renderCartTable();
}
//RenderCartTable & its functions
function addCart(product_id) {
for (var i = 0; i < products.length; i++) {
if (products[i].product_id == product_id) {
var cartItem = null;
for (var k = 0; k < cart.length; k++) {
if (cart[k].product.product_id == products[i].product_id) {
cartItem = cart[k];
cart[k].product_qty++;
break;
}
}
if (cartItem == null) {
cartItem = {
product: products[i],
product_qty: products[i].product_qty
};
cart.push(cartItem);
}
}
}
}
The code pulls from a list of products, and produces a table with the name, description, and price of the item, along with the Add to Cart button. The button is meant to add the item to a different list, called "cart".
Any and all help appreciated. Thanks for your time!
Below is all of the code--
<!DOCTYPE html>
<html>
<body>
<br/>
<p id="location1"> </p>
<br/>
<h2> Shopping Cart </h2>
<p id="location2"> </p>
<h2>Grand Total:</h2>
<p id="location3"> </p>
<script type="text/javascript", language="javascript", src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
var products = [];
var cart = [];
//label individual products below in individual lists, and then have the product put through the product_setup function
var product1 = ["Anvil", "Premium Grade Iron", 119.99];
var product2 = ["Female Roadrunner Costume", "Guaranteed to attract Male Roadrunners", 54.99];
function product_setup(product) {
var productID = product[0];
var product_desc = product[1];
var qty = 1;
var price = product[2];
var newProduct = {
product_id: null,
product_desc: null,
product_qty: 0,
product_price: 0.00,
};
newProduct.product_id = productID;
newProduct.product_desc = product_desc;
newProduct.product_qty = qty;
newProduct.product_price = price;
products.push(newProduct);
}
product_setup(product1);
product_setup(product2);
function product_table() {
var html = "<table border = '1|1' >";
html += "<td>Product Name</td>";
html += "<td>Product Description</td>";
html += "<td>Price</td>";
html += "<td> </td>";
for (var i = 0; i < products.length; i ++) {
html += "<tr>";
html += "<td>" + products[i].product_id + "</td>";
html += "<td>" + products[i].product_desc + "</td>";
html += "<td>" + products[i].product_price + "</td>";
html += "<td>" + "<button type = 'submit' onclick = 'addCart(products[i].product_id, this)'>Add to Cart</button>" + "</td>";
html += "</tr>";
}
html += "</table>";
document.getElementById("location1").innerHTML = html;
}
product_table();
function subtractQuantity(product_id) {
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart[i].product_qty--;
}
if (cart[i].product_qty == 0) {
cart.splice(i,1);
}
}
renderCartTable();
}
function addQuantity(product_id) {
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart[i].product_qty++;
}
}
renderCartTable();
}
function removeItem(product_id) {
for (var i = 0; i < cart.length; i++) {
if (cart[i].product.product_id == product_id) {
cart.splice(i,1);
}
}
renderCartTable();
}
function renderCartTable() {
var html = '';
var ele = document.getElementById("location2");
ele.innerHTML = '';
html += "<table id='tblCart' border='1|1'>";
html += "<tr><td>Product ID</td>";
html += "<td>Product Description</td>";
html += "<td>Quantity</td>";
html += "<td>Price</td>";
html += "<td>Total</td>";
html += "<td>Action</td></tr>";
var GrandTotal = 0;
for (var i = 0; i < cart.length; i++) {
html += "<tr>";
html += "<td>" + cart[i].product.product_id + "</td>";
html += "<td>" + cart[i].product.product_desc + "</td>";
html += "<td>" + cart[i].product_qty + "</td>";
html += "<td>" + cart[i].product.product_price + "</td>";
html += "<td>" + parseFloat(cart[i].product.product_price) * parseInt(cart[i].product_qty, 10) + "</td>";
html += "<td><button type='submit' onClick= 'subtractQuantity(\"" + cart[i].product.product_id + "\", this);'>Subtract Item</button> &nbsp <button type='submit' onClick='addQuantity(\"" + cart[i].product.product_id + "\", this);'/>Add Item</button> &nbsp<button type='submit' onClick='removeItem(\"" + cart[i].product.product_id + "\", this);'/>Remove Item</button></td>";
html += "</tr>";
GrandTotal += parseFloat(cart[i].product.product_price) * parseInt(cart[i].product_qty, 10);
}
document.getElementById("location3").innerHTML = "$ " + GrandTotal;
html += "</table>";
ele.innerHTML = html;
}
renderCartTable();
function addCart(product_id) {
for (var i = 0; i < products.length; i++) {
if (products[i].product_id == product_id) {
var cartItem = null;
for (var k = 0; k < cart.length; k++) {
if (cart[k].product.product_id == products[i].product_id) {
cartItem = cart[k];
cart[k].product_qty++;
break;
}
}
if (cartItem == null) {
cartItem = {
product: products[i],
product_qty: products[i].product_qty
};
cart.push(cartItem);
}
}
}
renderCartTable();
}
</script>
</body>
</html>

You want this:
html += "<td>" + "<button type = 'submit' onclick = 'addCart(\"" + products[i].product_id + "\")'>Add to Cart</button>" + "</td>";
In your case, when clicking the button onclick = 'addCart(products[i].product_id), The i inside products[i] is only known inside the product_table(){...} so when called outside it's context, i is undefined. There was an attempt to pass the context in using this, while a good idea, that i would be knows inside addCart and not where addCart is being called (global context, or window) and since the for-loop continues that i would not have the correct value.
So instead we pass the whole product-id in as a string and it works.
So how could we get rid of the ugly escape-strings?
Template literals are almost always prettier html += `<td><button type = 'submit' onclick = 'addCart("${products[i].product_id}")'>Add to Cart</button></td>`; but it's a ES6 feature (so check what browsers you need to support).
I think binding the click-event to the container, and outside the renderfunction would be prettier. Since we only need one listener that way. As opposed to creating new onclicks on every call to renderCartTable.
var clickHandler = function(evt){
if(evt.target.nodeName === 'BUTTON'){
// Check that we have the right button (from a class perhaps)
// parse out data from event.target.parentElement
// or pass in product-id via a data attribute
}
};
document.getElementById("location1").addEventListener('click', clickHandler)

I think you are passing product_name to the addCart and checking it against product_id.
Try putting debugger; and check the value you get in the function.

try this, hope this works:
var html = "<table border = '1|1' >";
html += "<td>Product Name</td>";
html += "<td>Product Description</td>";
html += "<td>Price</td>";
html += "<td>Add to Cart</td>";
for (var i = 0; i < products.length; i ++) {
html += "<tr>";
html += "<td>" + products[i].product_name + "</td>";
html += "<td>" + products[i].product_desc + "</td>";
html += "<td>" + products[i].product_price + "</td>";
html += "<td>" + "<button type = 'submit' onclick = 'addCart("+products[i].product_id+", this)'>Add to Cart</button>" + "</td>";
html += "</tr>";
}
html += "</table>";
document.getElementById("location1").innerHTML = html;
function addCart(product_id) {
for (var i = 0; i < products.length; i++) {
if (products[i].product_id == product_id) {
var cartItem = null, cartItemId;
if (cart.length > 0)
for (var k = 0; k < cart.length; k++) {
if (cart[k].product.product_id == products[i].product_id) {
cartItem = cart[k];
cart[k].product_qty++;
break;
}
}
if (cartItem == null) {
var cartItem = {
product: products[i],
product_qty: products[i].product_qty + 1
};
cartItemId = cart.push(cartItem);
}
}
}
renderCartTable();
}
also make sure products array looks like this:
var products = [
{product_id: 0, product_name: "item1", product_desc: "desc1", product_price: 100, product_qty: 0},
{product_id: 1, product_name: "item2", product_desc: "desc2", product_price: 200, product_qty: 0},
{product_id: 2, product_name: "item3", product_desc: "desc3", product_price: 300, product_qty: 0},
{product_id: 3, product_name: "item4", product_desc: "desc4", product_price: 400, product_qty: 0}
];

functions wont work on appended data, so better use JQuery or something and do it like this.
$('#myTable').on('click','.addToCart',function(){
//perform something...
});
You can also do
$(document).on('click','.addToCart',function(){
//perform something...
});

Generate HTML table and load it in div element

I'd like to load a HTML table into a div-element (id="resultDataDistancesTable") - but the generated string isn't processed (no matter if I use html(), append() or innerHTML). There is no error in the console.
When I paste the console.log(..) output directly to the HTML page I get the table that I want - so why doesn't my JavaScript code work? Is something wrong with the string?
var response = {"distances":[[0,4569,17264,6074,4986,12430,10936,11729,11280,23714,19112,24070,24974,25809,24157,27636,27323,15690,27970,22152],[4837,0,9160,1879,1872,12492,10755,15237,14468,21251,16649,17650,20574,23346,21694,31144,30831,13227,23141,19689],[17807,9681,0,8419,14314,25164,23427,28206,27140,11709,17204,18205,21130,23901,22249,30219,29906,4147,23696,10294],[6156,1736,8271,0,3191,12812,8437,16555,14788,22085,17483,18484,21408,24180,22528,30498,30185,14061,23975,20523],[5438,1642,14335,3147,0,12796,11058,15838,14771,20785,16183,17184,20108,22880,21228,31745,31432,12761,22674,19223],[12266,13371,25607,10970,13329,0,1842,20750,6094,32057,27455,28455,31380,34152,32500,37248,36935,24033,37581,30495],[10434,11651,16093,8428,11608,1842,0,19509,7092,30336,25734,26735,29659,32431,30779,35416,35104,22312,35750,28774],[12355,15633,28328,17138,16050,19963,20849,0,6457,34778,30176,26719,27624,33122,31702,30285,29973,26754,30619,33216],[11054,14433,26669,14776,14391,6088,9450,10828,0,33119,28517,36279,37184,35214,33562,39846,39533,25095,40179,31557],[21936,20085,11649,19803,18444,29293,27556,32335,31269,0,2943,8201,8702,10694,9042,17012,16699,8876,11268,5269],[19141,17291,16426,17009,15649,26499,24762,29541,28475,2924,0,5407,6515,9365,7713,15683,15370,14852,9082,6033],[22777,19065,18201,18783,17424,28274,26536,25758,31348,8188,5556,0,2979,5144,6115,10994,10681,16626,5493,10239],[23722,21760,20895,21478,20118,30968,29231,26703,32292,8634,6627,2994,0,2715,3388,4505,4192,19321,3110,11521],[29801,24947,24082,24665,23305,34155,32417,32782,38371,9673,8179,5136,2704,0,2345,4277,3964,22508,1703,15331],[25139,23289,22424,23007,21647,32497,30760,30797,34473,8016,6521,6129,3394,2340,0,5174,4862,20850,3779,13673],[26964,30242,30040,31748,30660,36952,35458,29945,35534,16511,10598,10365,4526,4274,5182,0,336,28466,1821,15492],[26628,29906,29704,31412,30324,36616,35122,29609,35198,16175,10262,10029,4190,3938,4846,313,0,28130,1485,15156],[16108,9772,4136,13975,12616,23466,21728,26507,25441,8931,10916,11916,14841,17613,15961,23930,23617,0,17407,7516],[27163,30441,23429,24012,22653,37151,35657,30144,35733,11168,9161,5495,3089,1703,3746,1686,1373,21855,0,14055],[22592,20741,10188,20459,19100,29949,28212,32991,31925,5369,5909,10225,11565,14414,12762,20732,20419,7415,14131,0]]};
buildResultTableDistances();
function buildResultTableDistances() {
var tbl;
var tr_head = "<table><tr><td>distances [meters]</td>";
for (var i = 0; i < 20; i++) {
tr_head += "<td><b>" + "dummy" + "</b></td>";
}
tr_head += "</tr>";
tbl = tr_head;
for (var i = 0; i < 20; i++) {
var row = "<tr><td><b>" + "dummy" + "</b></td>";
for (var ii = 0; ii < 20; ii++) {
row += "<td>" + response.distances[i][ii] + "</td>";
}
row += "</tr>";
tbl += row;
}
tbl += "</table>";
console.log(tbl);
$('#resultDataDistancesTable').html(tbl);
}

I suspect you forgot to insert the HTML or including jQuery, because it works fine here. If you want, to do this solely in JavaScript by adding the element in jQuery:
$(document.body).append('<div id="resultDataDistancesTable"></div>');
var response = {"distances":[[0,4569,17264,6074,4986,12430,10936,11729,11280,23714,19112,24070,24974,25809,24157,27636,27323,15690,27970,22152],[4837,0,9160,1879,1872,12492,10755,15237,14468,21251,16649,17650,20574,23346,21694,31144,30831,13227,23141,19689],[17807,9681,0,8419,14314,25164,23427,28206,27140,11709,17204,18205,21130,23901,22249,30219,29906,4147,23696,10294],[6156,1736,8271,0,3191,12812,8437,16555,14788,22085,17483,18484,21408,24180,22528,30498,30185,14061,23975,20523],[5438,1642,14335,3147,0,12796,11058,15838,14771,20785,16183,17184,20108,22880,21228,31745,31432,12761,22674,19223],[12266,13371,25607,10970,13329,0,1842,20750,6094,32057,27455,28455,31380,34152,32500,37248,36935,24033,37581,30495],[10434,11651,16093,8428,11608,1842,0,19509,7092,30336,25734,26735,29659,32431,30779,35416,35104,22312,35750,28774],[12355,15633,28328,17138,16050,19963,20849,0,6457,34778,30176,26719,27624,33122,31702,30285,29973,26754,30619,33216],[11054,14433,26669,14776,14391,6088,9450,10828,0,33119,28517,36279,37184,35214,33562,39846,39533,25095,40179,31557],[21936,20085,11649,19803,18444,29293,27556,32335,31269,0,2943,8201,8702,10694,9042,17012,16699,8876,11268,5269],[19141,17291,16426,17009,15649,26499,24762,29541,28475,2924,0,5407,6515,9365,7713,15683,15370,14852,9082,6033],[22777,19065,18201,18783,17424,28274,26536,25758,31348,8188,5556,0,2979,5144,6115,10994,10681,16626,5493,10239],[23722,21760,20895,21478,20118,30968,29231,26703,32292,8634,6627,2994,0,2715,3388,4505,4192,19321,3110,11521],[29801,24947,24082,24665,23305,34155,32417,32782,38371,9673,8179,5136,2704,0,2345,4277,3964,22508,1703,15331],[25139,23289,22424,23007,21647,32497,30760,30797,34473,8016,6521,6129,3394,2340,0,5174,4862,20850,3779,13673],[26964,30242,30040,31748,30660,36952,35458,29945,35534,16511,10598,10365,4526,4274,5182,0,336,28466,1821,15492],[26628,29906,29704,31412,30324,36616,35122,29609,35198,16175,10262,10029,4190,3938,4846,313,0,28130,1485,15156],[16108,9772,4136,13975,12616,23466,21728,26507,25441,8931,10916,11916,14841,17613,15961,23930,23617,0,17407,7516],[27163,30441,23429,24012,22653,37151,35657,30144,35733,11168,9161,5495,3089,1703,3746,1686,1373,21855,0,14055],[22592,20741,10188,20459,19100,29949,28212,32991,31925,5369,5909,10225,11565,14414,12762,20732,20419,7415,14131,0]]};
buildResultTableDistances();
function buildResultTableDistances() {
var tbl;
var tr_head = "<table><tr><td>distances [meters]</td>";
for (var i = 0; i < 20; i++) {
tr_head += "<td><b>" + "dummy" + "</b></td>";
}
tr_head += "</tr>";
tbl = tr_head;
for (var i = 0; i < 20; i++) {
var row = "<tr><td><b>" + "dummy" + "</b></td>";
for (var ii = 0; ii < 20; ii++) {
row += "<td>" + response.distances[i][ii] + "</td>";
}
row += "</tr>";
tbl += row;
}
tbl += "</table>";
$('#resultDataDistancesTable').html(tbl);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="resultDataDistancesTable"></div>

I could replicate your issue using Plunker: http://plnkr.co/edit/QxklTx0R6WcYwpRIpd98 has the fix. You weren't waiting for the DOM to be loaded before attempting to append to the object. See line 3:
$("document").ready(function() {
buildResultTableDistances();
});
Should work then.

Add pagination to dynamically created html table

I am trying to add pagination to a dynamically generated html . I have added these scripts in my Default.aspx page
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"> </script>
<script type ="text/javascript" src="https://cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script>
<link rel ="stylesheet" type=" text/css" href=" https://cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css" />
<div id = resultDiv></div>
The table will appear in this div.
The table is being created dynamically after obtaining a JSON response from a web service
My JS file looks like this
$.ajax({
url: 'cannot mention',
method: 'get',
data: requestData,
dataType: 'json',
success: function (data) {
var ordersArray = data.orders;
var i;
var k;
var quantityArray;
var out = "<legend class='bluefont'><b><span id='info'>FOD</span></b></legend>"
out += "<table id ='tableresult' border='2px' style='font-size: 8pt '>";
out += "<tr><th> Order Date</th>";
for (i = 0; i < ordersArray.length; i++) {
out += "<td>" + ordersArray[i].orderDate + "</td>";
}
out += "</tr>";
out += "<tr><th>Delivery Date</th>";
for (i = 0; i < ordersArray.length; i++) {
out += "<td>" + ordersArray[i].deliveryDate + "</td>";
}
out += "</tr>";
out += "<tr><th>Quantity</th>";
for (i = 0; i < ordersArray.length; i++) {
quantityArray = ordersArray[i].order
for (k = 0; k < quantityArray.length ; k++){
out += "<td>" + quantityArray[k].quantity + "</td>";
}
}
out += "</tr>";
out += "</table>";
document.getElementById("resultDiv").innerHTML = out;
document.getElementById("tableresult").dataTable
It says dataTable is not a function. Please help

You need to jQuery object to initialize jQuery DataTables. For example:
$('#tableresult').DataTable();

Why is nan being added to data?

I make an ajax call to a servlet which sends JSON data. I parse it with JSON.parse() and put it into a string to display in table tag in html. But with every row cell data it is showing NaN. I have checked the data there is no NaN.
Here's the code.
var dataFromJSON = JSON.parse(result);
var count = dataFromJSON.count;
var str = "<table id='customers'><tr><th>LOGGED DATE</th></tr>";
for (var i = 0; i < count; i++) {
str += "<tr><td>" + dataFromJSON.records[i].common.logged_date +
+"</td>";
str += "</tr>";
}
str += "</table>";
$("#data").html(str);
The data in dataFromJSON.records[i].common.logged_date is 2016-02-23 10:11:43, but the table shows 2016-02-23 10:11:43NaN.
Please help.

Here:
str += "<tr><td>" + dataFromJSON.records[i].common.logged_date+
+ "</td>";
You have two + right after another. The browser tries to interpret this whitespace as a number
Remove one of the +.

You have put ++ please use only +
var dataFromJSON = JSON.parse(result);
var count = dataFromJSON.count;
var str = "<table id='customers'><tr><th>LOGGED DATE</th></tr>";
for (var i = 0; i < count; i++) {
str += "<tr><td>" + dataFromJSON.records[i].common.logged_date +"</td>"; //chnage here
str += "</tr>";
}
str += "</table>";
$("#data").html(str);

We Keep Coding

JavaScript is the programming language of the Web.

I might've overdosed innerHTML and get undefined - javascript

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