Develop Reference

Print JS Variable in HTML

I would like to output a JS variable to HTML. Until now I have attached it to the URL and then truncated it. unfortunately other things like this don't work and I would like to pass the Label variable directly into 'Tablet_name'. Is this possible?
Here is the JS code with the var label.
function search_period(period, max_num, offset) {
var count = 0;
var link = ""
var div = document.createElement('div')
var h2 = document.createElement('h2')
var iiif = ""
h2.innerHTML = period
document.body.appendChild(h2)
const keys = Object.keys(urls);
for(const elem of keys) {
var label = urls[elem].label
for(const el of urls[elem].variants) {
if(el.label.includes('front')) {
iiif = el.url
}
}
if(!periods.hasOwnProperty(label)) {
continue;
}
if(periods[label] != period) {
continue;
}
if(count < offset) {
count+=1
continue
}
link = changeIIIFInformation(iiif, 10, "default")
var figure = document.createElement('figure')
var figcaption = document.createElement('figcaption')
var linkToImage = document.createElement('a')
//linkToImage.setAttribute('#image', label)
linkToImage.setAttribute('href', 'annotator#'+label)
linkToImage.innerHTML = label
figcaption.appendChild(linkToImage)
var image = document.createElement('img')
image.setAttribute('src', link)
figure.appendChild(image)
figure.appendChild(figcaption)
div.appendChild(figure)
count += 1;
if(count >= max_num+offset) {
break;
}
}
document.body.appendChild(div)
}
And here is the HTML Code:
var tablet_name = ""
var default_tablet_link = ""
if(document.URL.includes('#')) {
tablet_name = document.URL.split('#')[1]
} else {
tablet_name = 'HS_0044'
}
I want the for the tablename the variable label.

i want to make my shoppingcart local so every time i refresh the page my stuff still needs to be in there but i just dont find the right way to do it

This is my code but I don't know where to start to add localstorage.
I am really trying every website for help because I just can't find it.
var _currentArr;
var _ItemsInCart = [];
var _totalPayment = 0;
function getArticle(item, addDetails) {
var article = document.createElement("article");
var h3 = document.createElement("H3");
h3.appendChild(document.createTextNode(item.title));
article.appendChild(h3);
var figure = document.createElement("FIGURE");
var img = document.createElement('img');
img.src = 'images/'+item.img;
var figcaption = document.createElement('figcaption');
figcaption.textContent = 'Meal by: '+item.cook;
figure.appendChild(img);
figure.appendChild(figcaption);
article.appendChild(figure);
// if need details
if (addDetails) {
var dl = document.createElement("dl");
var dt1 = document.createElement("dt");
var dd1 = document.createElement("dd");
dt1.textContent = 'calories:';
dd1.textContent = item.calories;
dl.appendChild(dt1);
dl.appendChild(dd1);
var dt2 = document.createElement("dt");
var dd2 = document.createElement("dd");
dt2.textContent = 'servings:';
dd2.textContent = item.servings;
dl.appendChild(dt2);
dl.appendChild(dd2);
var dt3 = document.createElement("dt");
var dd3 = document.createElement("dd");
dt3.textContent = 'days to book in advance:';
dd3.textContent = item.book;
dl.appendChild(dt3);
dl.appendChild(dd3);
var dt4 = document.createElement("dt");
var dd4 = document.createElement("dd");
dt4.textContent = 'type:';
dd4.textContent = item.type;
dl.appendChild(dt4);
dl.appendChild(dd4);
article.appendChild(dl);
}
// info div
var div = document.createElement("DIV");
div.setAttribute("class", "info");
var p = document.createElement("P");
p.textContent = '€'+item.price+'/pp';
var a = document.createElement("A");
a.setAttribute("href", '#');
a.textContent = 'order';
a.setAttribute("id", item.id);
if (addDetails) {
a.setAttribute("data-item", JSON.stringify(item));
a.className = "order placeOrderInCart";
} else {
a.className = "order orderBtn";
}
// in div
div.appendChild(p);
div.appendChild(a);
article.appendChild(div);
return article;
}
function makeTemplateFromArray(arr) {
_currentArr = [];
_currentArr = arr;
var container = document.getElementById('dynamicContent');
container.innerHTML = '';
if (arr && arr.length) {
arr.forEach(function (item, index) {
// append article
container.appendChild(getArticle(item, false));
});
}
}
function makeTemplateFromItem(item) {
if (item) {
var container = document.getElementById('popupContentWrapper');
container.innerHTML = '';
container.appendChild(getArticle(item, true));
}
}
function showModal(id) {
// find item by id
if (_MEALS && id) {
var found = _MEALS.find(function(item) {
if (item.id === parseInt(id)) {
return true;
}
});
if (found) {
makeTemplateFromItem(found);
}
}
// open modal
document.getElementById('popup').style.display = "block";
}
// sorting
function sortItems() {
var a = _MEALS.slice(0, _MEALS.length);
var k = event.target.value;
makeTemplateFromArray(doSortData(k, a));
}
function doSortData(key, arr) {
var compare = function ( a, b) {
if ( a[key] < b[key] ){
return -1;
}
if ( a[key] > b[key] ){
return 1;
}
return 0;
};
return arr.sort( compare );
}
// change direction
function changeDirection() {
var val = event.target.value;
var a = _currentArr.slice(0, _currentArr.length);
if (val === 'desc') {
makeTemplateFromArray(a.reverse());
} else {
makeTemplateFromArray(_MEALS);
}
}
// search on input
function searchInArray() {
var val = event.target.value;
if (val && val.length > 1) {
val = val.toLowerCase();
var arr = _MEALS.filter(function (item) {
if (item.title.toLowerCase().includes(val)) {
return true;
}
});
makeTemplateFromArray(arr);
} else {
makeTemplateFromArray(_MEALS);
}
}
// prepare options
function prepareOptions(obj) {
var select = document.getElementById('sortby');
Object.keys(obj).forEach(function (key) {
var opt = document.createElement('option');
opt.value = key;
opt.innerHTML = key;
select.appendChild(opt);
});
}
// add item in cart
function addItemInCart(item) {
_ItemsInCart.push(item);
var elem = document.getElementById('cartCounter');
elem.innerHTML = _ItemsInCart.length;
}
// show cart
function showCart() {
// prepare template
var container = document.getElementById('cartItems');
var table = document.createElement("table");
var thead = document.createElement("thead");
var tbody = document.createElement("tbody");
var tfoot = document.createElement("tfoot");
container.innerHTML = '';
var thBody = '<tr><th>Meal</th><th>Price</th></tr>';
thead.innerHTML = thBody;
// tbody
_totalPayment = 0;
_ItemsInCart.forEach(function(item) {
_totalPayment += parseInt(item.price);
var tBodyTemp = '<tr><td>'+item.title+'</td><td>€ '+item.price+'</td></tr>';
tbody.innerHTML += tBodyTemp;
});
// tfoot
var tfootBody = '<tr><td>Total</td><td>€ '+_totalPayment+'</td></tr>';
tfoot.innerHTML = tfootBody;
table.appendChild(thead);
table.appendChild(tbody);
table.appendChild(tfoot);
container.appendChild(table);
// open modal
document.getElementById('cart').style.display = "block";
}
// proceed to checkout
function proceedToCheckout() {
document.getElementById('cartoverview').classList.add('hidden');
document.getElementById('personalinformation').classList.remove('hidden');
}
// validate form submit
function validatepersonalInfoForm() {
document.getElementById('personalinformation').classList.add('hidden');
document.getElementById('confirmation').classList.remove('hidden');
// set values
var val = document.querySelector('input[name="paymentmethod"]:checked').value;
document.getElementById('price').innerHTML = '€ '+_totalPayment;
document.getElementById('paymentmethod').innerHTML = 'in '+val;
}
function setRandomItem() {
var max = _MEALS.length;
var min = 0;
var number = Math.floor(Math.random() * (max - min + 1)) + min;
var item = _MEALS[number];
document.getElementById('mealofthedayimg').src = 'images/'+item.img;
}
// listen on click event for order button
document.body.addEventListener("click", function (event) {
// close modal box
if (event.target.classList.contains("close")) {
document.getElementById('cart').removeAttribute('style');
document.getElementById('popup').removeAttribute('style');
// remove classes from element
document.getElementById('cartoverview').classList.remove('hidden');
document.getElementById('personalinformation').classList.add('hidden');
document.getElementById('confirmation').classList.add('hidden');
}
// open modal box
if (event.target.classList.contains("orderBtn")) {
event.preventDefault();
showModal(event.target.getAttribute("id"));
}
// add item in cart
if (event.target.classList.contains("placeOrderInCart")) {
event.preventDefault();
var item = JSON.parse(event.target.getAttribute("data-item"));
if (item) {
addItemInCart(item);
}
}
});
setTimeout( function() {
// console.log(_MEALS);
makeTemplateFromArray(_MEALS);
prepareOptions(_MEALS[0]);
setRandomItem();
}, 100);

After you add something into _ItemsInCart, set _ItemsInCart as data in localstorage.
Before you want to get something from _ItemsInCart, get data from localstorage first and set it to _ItemsInCart.
_ItemsInCart should always sync with your data in localstorage.
How to use localstorage:
https://www.w3schools.com/html/html5_webstorage.asp
Advice: If possible, separate your DOM manipulating code with your logic code.

how to find index of array using substring value in javascript and replace with a new string?

I am getting string -
["1-2","10-4","2-3","3-1","4-4","5-2","6-4","7-3","8-1","9-2"]
as output from GetOption function where event - QuestionID & event1 -OptionID
Project-Online Examination System
var getValue;
var getName = new Array();
var temp = new Array();
function GetOption(event, event1) {
debugger;
if (temp.includes(event)) {
var x = getName.indexOf(event);
getName.splice(x - 1, 1);
getName.includes(event);
}
this.event1 = event1;
temp.push(event);
var getValue = event + "-" + event1;
if (getValue == "undefined-undefined") {
getName.push("");
} else {
getName.push(getValue);
getName.sort();
alert(getName);
}
$("#resultHidden").val(getName);
}

var items = ["1-2","10-4","2-3","3-1","4-4","5-2","6-4","7-3","8-1","9-2"];
var searchItems = "1-2";
var newItems = "2-1";
for (var i = 0; i < items.length; i++) {
if (items[i].startsWith(searchItems)) {
items[i] = newItems;
}
}

Return click functionality with localstorage data

I had been working on this project a few months back and kind of forgot about it. Anyway, I am going to try finish it now. My question is this. I have a dynamically created table in which each cell is clickable. On the click you can choose to fill the cell of the table with a different image from an array. This is fine. Using localstorage I can save the table state after clicks have been made to reflect the changes made, but when I exit the page and re-enter the changed images are redrawn but the table is no longer clickable. I am struggling to find a solution. Perhaps you can help? Here is some code:
function makeChart() {
table = document.createElement('table');
var taskName = document.getElementById('taskname').value,
header = document.createElement('th'),
numDays = document.getElementById('days').value, //columns
howOften = document.getElementById('times').value, //rows
row,
r,
col,
c;
target= numDays*howOften;
var cel = null;
var myImages = new Array();
myImages[0] = "../www/images/test.png";
myImages[1] = "../www/images/test.png";
myImages[2] = "../www/images/test.png";
var my_div = document.createElement("div");
my_div.id = "showPics";
document.body.appendChild(my_div);
var newList = document.createElement("ul");
my_div.appendChild(newList);
if (taskName == '' || numDays == '') {
alert('Please enter task name and number of days');
}
if (howOften == '') {
howOften = 1;
}
if (taskName != '' && numDays != '') {
for (var i = 0; i < myImages.length; i++) {
var allImages = new Image();
allImages.src = myImages[i];
allImages.onclick = function (e) {
if (sel !== null) {
sel.src = e.target.src;
my_div.style.display = 'none';
sel.onclick = null;
sel = null;
}
};
var li = document.createElement('li');
li.appendChild(allImages);
newList.appendChild(li);
}
my_div.style.display = 'none';
header.innerHTML = taskName;
table.appendChild(header);
function addImage(col) {
var img = new Image();
img.src = "../www/images/imageholder.png";
col.appendChild(img);
img.onclick = function () {
my_div.style.display = 'block';
sel = img;
};
}
for (r = 0; r < howOften; r++) {
row = table.insertRow(-1);
for (c = 0; c < numDays; c++) {
col = row.insertCell(-1);
addImage(col);
}
}
document.getElementById('singleUser').appendChild(table);
var blankVal = {
value : ''
};
$("#taskname").attr(blankVal);
$("#days").attr(blankVal);
$("#times").attr(blankVal);
document.getElementById('createChart').onclick = null;
saveData();
}
}
function saveData(){
localStorage.setItem(name, table.innerHTML);
}
function showData(){
var showme = localStorage.getItem(name);
var newTable = document.createElement('table');
newTable.innerHTML= showme;
newTable.id = "newTable";
var showIt= document.getElementById('holdTable');
showIt.appendChild(newTable);
console.log(showIt);
};

javascript - Failed to load source for: http://localhost/js/m.js

Why oh why oh why... I can't figure out why I keep getting this error. I think I might cry.
/*** common functions */
function GE(id) { return document.getElementById(id); }
function changePage(newLoc) {
nextPage = newLoc.options[newLoc.selectedIndex].value
if (nextPage != "")
{
document.location.href = nextPage
}
}
function isHorizO(){
if (navigator.userAgent.indexOf('iPod')>-1)
return (window.orientation == 90 || window.orientation==-90)? 1 : 0;
else return 1;
}
function ShowHideE(el, act){
if (GE(el)) GE(el).style.display = act;
}
function KeepTop(){
window.scrollTo(0, 1);
}
/* end of common function */
var f = window.onload;
if (typeof f == 'function'){
window.onload = function() {
f();
init();
}
}else window.onload = init;
function init(){
if (GE('frontpage')) init_FP();
else {
if (GE('image')) init_Image();
setTimeout('window.scrollTo(0, 1)', 100);
}
AddExtLink();
}
function AddExtLink(){
var z = GE('extLink');
if (z){
z = z.getElementsByTagName('a');
if (z.length>0){
z = z[0];
var e_name = z.innerHTML;
var e_link = z.href;
var newOption, oSe;
if (GE('PSel')) oSe = new Array(GE('PSel'));
else
oSe = getObjectsByClassName('PSel', 'select')
for(i=0; i<oSe.length; i++){
newOption = new Option(e_name, e_link);
oSe[i].options[oSe[i].options.length] = newOption;
}
}
}
}
/* fp */
function FP_OrientChanged() {
init_FP();
}
function init_FP() {
// GE('orientMsg').style.visibility = (!isHorizO())? 'visible' : 'hidden';
}
/* gallery */
function GAL_OrientChanged(link){
if (!isHorizO()){
ShowHideE('vertCover', 'block');
GoG(link);
}
setTimeout('window.scrollTo(0, 1)', 500);
}
function init_Portfolio() {
// if (!isHorizO())
// ShowHideE('vertCover', 'block');
}
function ShowPortfolios(){
if (isHorizO()) ShowHideE('vertCover', 'none');
}
var CurPos_G = 1
function MoveG(dir) {
MoveItem('G',CurPos_G, dir);
}
/* image */
function init_Image(){
// check for alone vertical images
PlaceAloneVertImages();
}
function Img_OrtChanged(){
//CompareOrientation(arImgOrt[CurPos_I]);
//setTimeout('window.scrollTo(0, 1)', 500);
}
var CurPos_I = 1
function MoveI(dir) {
CompareOrientation(arImgOrt[CurPos_I+dir]);
MoveItem('I',CurPos_I, dir);
}
var arImgOrt = new Array(); // orientation: 1-horizontal, 0-vertical
var aModeName = new Array('Horizontal' , 'Vertical');
var arHs = new Array();
function getDims(obj, ind){
var arT = new Array(2);
arT[0] = obj.height;
arT[1] = obj.width;
//arWs[ind-1] = arT;
arHs[ind] = arT[0];
//**** (arT[0] > arT[1]) = (vertical image=0)
arImgOrt[ind] = (arT[0] > arT[1])? 0 : 1;
// todor debug
if(DebugMode) {
//alert("["+obj.width+","+obj.height+"] mode="+((arT[0] > arT[1])? 'verical' : 'hoziontal'))
writeLog("["+obj.width+","+obj.height+"] mode="+((arT[0] > arT[1])? 'verical' : 'hoziontal')+' src='+obj.src)
}
if (arImgOrt[ind]) {
GE('mi'+ind).className = 'mImageH';
}
}
function CompareOrientation(imgOrt){
var iPhoneOrt = aModeName[isHorizO()];
GE('omode').innerHTML = iPhoneOrt;
//alert(imgOrt == isHorizO())
var sSH = (imgOrt == isHorizO())? 'none' : 'block';
ShowHideE('vertCover', sSH);
var sL = imgOrt? 'H' : 'V';
if (GE('navig')) GE('navig').className = 'navig'+ sL ;
if (GE('mainimage')) GE('mainimage').className = 'mainimage'+sL;
var sPfL = imgOrt? 'Port-<br>folios' : 'Portfolios' ;
if (GE('PortLnk')) GE('PortLnk').innerHTML = sPfL;
}
function SetGetDim( iMInd){
var dv = GE('IImg'+iMInd);
if (dv) {
var arI = dv.getElementsByTagName('img');
if (arI.length>0){
var oImg = arI[0];
oImg.id = 'Img'+iMInd;
oImg.className = 'imageStyle';
//YAHOO.util.Event.removeListener('Img'+iMInd,'load');
YAHOO.util.Event.on('Img'+iMInd, 'load', function(){GetDims(oImg,iMInd);}, true, true);
//oImg.addEventListener('load',GetDims(oImg,iMInd),true);
}
}
}
var occ = new Array();
function PlaceAloneVertImages(){
var iBLim, iELim;
iBLim = 0;
iELim = arImgOrt.length;
occ[0] = true;
//occ[iELim]=true;
for (i=1; i<iELim; i++){
if ( arImgOrt[i]){//horizontal image
occ[i]=true;
continue;
}else { // current is vertical
if (!occ[i-1]){//previous is free-alone. this happens only the first time width i=1
occ[i] = true;
continue;
}else {
if (i+1 == iELim){//this is the last image, it is alone and vertical
GE('mi'+i).className = 'mImageV_a'; //***** expand the image container
}else {
if ( arImgOrt[i+1] ){
GE('mi'+i).className = 'mImageV_a';//*****expland image container
occ[i] = true;
occ[i+1] = true;
i++;
continue;
}else { // second vertical image
occ[i] = true;
occ[i+1] = true;
if (arHs[i]>arHs[i+1]) GE('mi'+(i+1)).style.height = arHs[i]+'px';
i++;
continue;
}
}
}
}
}
//arImgOrt
}
function AdjustWebSiteTitle(){
//if (GE('wstitle')) if (GE('wstitle').offsetWidth > GE('wsholder').offsetWidth) {
if (GE('wstitle')) if (GE('wstitle').offsetWidth > 325) {
ShowHideE('dots1','block');
ShowHideE('dots2','block');
}
}
function getObjectsByClassName(className, eLTag, parent){
var oParent;
var arr = new Array();
if (parent) oParent = GE(parent); else oParent=document;
var elems = oParent.getElementsByTagName(eLTag);
for(var i = 0; i < elems.length; i++)
{
var elem = elems[i];
var cls = elem.className
if(cls == className){
arr[arr.length] = elem;
}
}
return arr;
}
////////////////////////////////
///
// todor debug
var DebugMode = (getQueryVariable("debug")=="1")
function getQueryVariable(variable) {
var query = window.location.search.substring(1);
var vars = query.split("&");
var sRet = ""
for (var i=0;i<vars.length;i++) {
var pair = vars[i].split("=");
if (pair[0] == variable) {
sRet = pair[1];
}
}
return sRet
//alert('Query Variable ' + variable + ' not found');
}
var oLogDiv=''
function writeLog(sMes){
if(!oLogDiv) oLogDiv=document.getElementById('oLogDiv')
if(!oLogDiv) {
oLogDiv = document.createElement("div");
oLogDiv.style.border="1px solid red"
var o = document.getElementsByTagName("body")
if(o.length>0) {
o[0].appendChild(oLogDiv)
}
}
if(oLogDiv) {
oLogDiv.innerHTML = sMes+"<br>"+oLogDiv.innerHTML
}
}

First, Firebug is your friend, get used to it. Second, if you paste each function and some supporting lines, one by one, you will eventually get to the following.
var DebugMode = (getQueryVariable("debug")=="1")
function getQueryVariable(variable)
You can't execute getQueryVariable before it is defined, you can create a handle to a future reference though, there is a difference.
There are several other potential issues in your code, but putting the var DebugMode line after the close of the getQueryVariable method should work fine.

It would help if you gave more context. For example, is
Failed to load source for:
http://localhost/js/m.js
the literal text of an error message? Where and when do you see it?
Also, does that code represent the contents of http://localhost/js/m.js? It seems that way, but it's hard to tell.
In any case, the JavaScript that you've shown has quite a few statements that are missing their semicolons. There may be other syntax errors as well. If you can't find them on your own, you might find tools such as jslint to be helpful.

make sure the type attribute in tag is "text/javascript" not "script/javascript".

I know it is more than a year since this question was asked, but I faced this today. I had a
<script type="text/javascript" src="/test/test-script.js"/>
and I was getting the 'Failed to load source for: http://localhost/test/test-script.js' error in Firebug. Even chrome was no loading this script. Then I modified the above line as
<script type="text/javascript" src="/test/test-script.js"></script>
and it started working both in Firefox and chrome. Documenting this here hoping that this will help someone. Btw, I dont know why the later works where as the previous one didn't.