Develop Reference

In JavaScript, Displaying pictures from an array?

I am making an rpg game. So I am trying to make a for loop that will generate buttons to the screen this what I have so far,
$(document).ready(function() {
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'assets/images/young_link.jpg';
//var test = "<img src= '../images/young_link.jpg'>";
//var young_hero = ["young_link","young_zelda","impa", "malon"];
var young_hero = ["young_link"];
//var hero_images = [test];
for (var i = 0; i < young_hero.length; i++) {
var hero_btns = $("<buttons>");
hero_btns.addClass("hero");
hero_btns.attr("data-hero" , young_hero[i]);
hero_btns.attr("data-image" , imgArray[i]);
hero_btns.text(imgArray[i]);
hero_btns.text(young_hero[i]);
$("#buttons").append(hero_btns);
}
});
The problem is that it is not putting the image on the button.

In order to add an image to your button, you will have to do more than just data-image, You will need to actually create an <img> tag and give it the source of the image. Then you will need to use css to get the image lined up properly in your button.
I have updated your code to add the image to the first button.
$(document).ready(function() {
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcT7o2tCpqvs_XRpvtHbuRe9KwkzydiVhWLJ6YVTkQcpkev09w0MBCgNu2w';
//var test = "<img src= '../images/young_link.jpg'>";
var young_hero = ["young_link","young_zelda","impa", "malon"];
//var young_hero = ["young_link"];
//var hero_images = [test];
for (var i = 0; i < young_hero.length; i++) {
var hero_btns = $("<button>"); // changed from <buttons>
hero_btns.addClass("hero");
hero_btns.attr("data-hero" , young_hero[i]);
//hero_btns.text(imgArray[i]);
hero_btns.text(young_hero[i]);
hero_btns.append(imgArray[i])
$("#buttons").append(hero_btns);
}
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="buttons">
</div>

Not sure about your exact requirement. Seems you are trying to create a button inside another button.
If you want to add an image use img tag and its src attribute
Not tested but you can try this
$(document).ready(function() {
var imgArray = new Array();
imgArray[0] = new Image();
imgArray[0].src = 'assets/images/young_link.jpg';
var young_hero = ["young_link"];
for (var i = 0; i < young_hero.length; i++) {
var hero_btns = $("<img>");
hero_btns.addClass("hero");
hero_btns.attr("data-hero", young_hero[i]);
hero_btns.attr("src", imgArray[i]);
hero_btns.text(imgArray[i]);
hero_btns.text(young_hero[i]);
$("#buttons").append(hero_btns);
}
});

$(function(){
var heroList = {
{heroName: "young_link", imagePath: "assets/images/young_link.jpg"},
{heroName: "young_zelda", imagePath: "assets/images/young_zelda.jpg"},
{heroName: "impa", imagePath: "assets/images/impa.jpg"},
{heroName: "young_link1", imagePath: "assets/images/young_link1.jpg"}];
for (var i = 0; i < heroList.length; i++) {
var hero_btns = $('<img class="hero">');
hero_btns.attr({
"data-index": i,
"src": heroList[i].imagePath,
"data-name": heroList[i].heroName,
"title": heroList[i].heroName
});
$("#buttons").append(hero_btns);
}
})
You can use this simple on jsfiddle example.

Create chart in a new Tab using Angular Js

I have a function that creates a chart in a new tab. I have done this in javascript. How should this be converted into AngularJs.
function OpenWin() {
var w = window.open();
w.document.open();
w.document.write('<div id="container" style="width:100%; height:400px;"></div>');
w.document.write('<select id="type" onchange="ChartFunc(this.value)"><option value="line">line</option><option value="column">column</option> <option value="area">area</option><option value="bar">bar</option></select>');
var scriptHead = w.document.createElement("SCRIPT");
var scriptHead1 = w.document.createElement("SCRIPT");
var link = "http://code.highcharts.com/highcharts.js";
var link1 = "http://code.highcharts.com/modules/exporting.js";
scriptHead.onload = function() {
var script = w.document.createElement("SCRIPT");
w.document.body.appendChild(script);
var js = w.document.createTextNode('var a = localStorage.getItem("ImportOptions"); var jsona = JSON.parse(a); var chart = new Highcharts.Chart(jsona);function ChartFunc(value){ console.log(value); jsona.chart.type = value;var chart = new Highcharts.Chart(jsona); }');
script.appendChild(js);
w.document.close();
scriptHead1.src = link1;
w.document.head.appendChild(scriptHead1);
}
scriptHead.src = link;
w.document.head.appendChild(scriptHead);
}

JavaScript Mouse Over Pause

I am really getting frustrated with my JS slideshow, I am trying to implement a mouse-over pause function in the slideshow. All I need the slideshow to do is pause when the user hovers over the slide. Seems easy right?! No, I have tried incorporating different functions but nothing seems to stick with the code.
<script type="text/javascript">// <![CDATA[
var imgs1 = new Array("http://www.cmsplc.com/media/wysiwyg/CMS_XMAS_BANNER_2.jpg","http://www.cmsplc.com/media/wysiwyg/Dymo_XTL_Range.jpg","http://www.cmsplc.com/media/wysiwyg/Banners/Homepage_Banners/Promotional_Banners/Fluke_Cashback_Upgrade_1.jpg","http://www.cmsplc.com/media/wysiwyg/Fluke_DTX_Buy_Back_2015.jpg");
var lnks1 = new Array("http://www.cmsplc.com/christmas-opening-times","http://www.cmsplc.com/dymo-xtl","http://www.cmsplc.com/fluke-dsx-upgrade-sept-2015/","http://www.cmsplc.com/fluke-networks-dtx-upgrade-offer/");
var alt1 = new Array();
var currentAd1 = 0;
var imgCt1 = 4;
function cycle1() {
if (currentAd1 == imgCt1) {
currentAd1 = 0;
}
var banner1 = document.getElementById('adBanner1');
var link1 = document.getElementById('adLink1');
banner1.src=imgs1[currentAd1]
banner1.alt=alt1[currentAd1]
document.getElementById('adLink1').href=lnks1[currentAd1]
currentAd1++;
}
window.setInterval("cycle1()",4000);
// ]]></script>
<p><a id="adLink1" target="_top"><img id="adBanner1" src="http://www.cmsplc.com/media/wysiwyg/CMS_XMAS_BANNER_2.jpg" border="0" alt="" width="804" height="300" /></a></p>
Where abouts in the above will I need to include the pause functions??!

A few changes. Give it this way:
// Put this on top.
var intvl = 0;
// Replace the setInterval line.
intvl = window.setInterval("cycle1()",4000);
And add this event handler:
// Add this at the end, may be before `<body />` inside a `<script>` tag.
adBanner1.onmouseover = function () {
clearInterval(intvl);
}
adBanner1.onmouseout = function () {
intvl = window.setInterval("cycle1()",4000);
}
Full Code
<p><a id="adLink1" target="_top"><img id="adBanner1" src="http://www.cmsplc.com/media/wysiwyg/CMS_XMAS_BANNER_2.jpg" border="0" alt="" width="804" height="300" /></a></p>
<script type="text/javascript">// <![CDATA[
var imgs1 = new Array("http://www.cmsplc.com/media/wysiwyg/CMS_XMAS_BANNER_2.jpg","http://www.cmsplc.com/media/wysiwyg/Dymo_XTL_Range.jpg","http://www.cmsplc.com/media/wysiwyg/Banners/Homepage_Banners/Promotional_Banners/Fluke_Cashback_Upgrade_1.jpg","http://www.cmsplc.com/media/wysiwyg/Fluke_DTX_Buy_Back_2015.jpg");
var lnks1 = new Array("http://www.cmsplc.com/christmas-opening-times","http://www.cmsplc.com/dymo-xtl","http://www.cmsplc.com/fluke-dsx-upgrade-sept-2015/","http://www.cmsplc.com/fluke-networks-dtx-upgrade-offer/");
var alt1 = new Array();
var currentAd1 = 0;
var imgCt1 = 4;
var intvl = 0;
function cycle1() {
if (currentAd1 == imgCt1) {
currentAd1 = 0;
}
var banner1 = document.getElementById('adBanner1');
var link1 = document.getElementById('adLink1');
banner1.src=imgs1[currentAd1]
banner1.alt=alt1[currentAd1]
document.getElementById('adLink1').href=lnks1[currentAd1]
currentAd1++;
}
intvl = window.setInterval("cycle1()",4000);
adBanner1.onmouseover = function () {
clearInterval(intvl);
}
adBanner1.onmouseout = function () {
intvl = window.setInterval("cycle1()",4000);
}
// ]]>
</script>

How to Change the Source of an Image W/JS

I have to change the src of an image using java script and I am pretty sure i hit a road block, in the html I have 3 li elements and in the id is the source of the mouseenter img. I feel like I am close but so far. Heres my code so far. Thanks for any help!
Javascript:
var $ = function (id) {
return document.getElementById(id);};
window.onload = function () {
var links = document.getElementsByTagName("li"),
imgElements = document.getElementsByTagName("img"),
imgNode,
i,
URLone,
URLtwo,
link,
image;
for (i = 0; i < imgElements.length; i++) {
imgNode = imgElements[i];
}
imgNode.mouseenter = function () {
var img = this;
URLtwo = img.getAttribute('id');
img.src = URLtwo;
}
imgNode.mouseout = function () {
var img = this;
URLone = img.getAttribute('src');
img.src = URLone;
};
//preload
for (i = 0; i < links.length * 2; i++) {
link = links[i];
image = new Image();
image.src = link.src;
image = new Image();
image.src = link.id;
}};
HTML ::
<body>
<section>
<h1>Ram Tap Combined Test</h1>
<ul id="image_rollovers">
<li><img src="images/h1.jpg" alt="" id="images/h4.jpg"></li>
<li><img src="images/h2.jpg" alt="" id="images/h5.jpg"></li>
<li><img src="images/h3.jpg" alt="" id="images/h6.jpg"></li>
</ul>
</section>
Working jQuery :
$(document).ready(function() {
$("#image_rollovers img").each(function() {
var oldURL = $(this).attr("src"); // gets the src attribute
var newURL = $(this).attr("id"); // gets the id attribute
// preload images
var rolloverImage = new Image();
rolloverImage.src = newURL;
$(this).hover(
function() {
$(this).attr("src", newURL); // sets the src attribute
},
function() {
$(this).attr("src", oldURL); // sets the src attribute
}
); // end hover
}); // end each
}); // end ready

for (i = 0; i < imgElements.length; i++) {
(function(imgNode) {
imgNode.addEventListener("mouseenter", function () {
var img = this;
URLtwo = img.getAttribute('id');
img.src = URLtwo;
}, false);
imgNode.addEventListener("mouseout", function () {
var img = this;
URLone = img.getAttribute('src');
img.src = URLone;
}, false);
})(imgElements[i]);
}

A couple of problems in your code.
First for loop closing right away, instead should close after your
imgNode.mouseout function
for (i = 0; i < imgElements.length; i++) {
imgNode = imgElements[i];
imgNode.mouseenter = function () {
var img = this;
URLtwo = img.getAttribute('id');
img.src = URLtwo;
}
imgNode.mouseout = function () {
var img = this;
URLone = img.getAttribute('src');
img.src = URLone;
};
}
//preload
for (i = 0; i < links.length * 2; i++) {
link = links[i];
image = new Image();
image.src = link.src;
image = new Image();
image.src = link.id;
}};
Last for loop runs 6 times but there are only 3 tags in html. When it coming to loop no. 3 it doesn't get any value for link.src.
Also links variable provides a collection of 'li' tags and not 'img', last for loop requires src from link.src which doesn't have any value, need to change
var links = document.getElementsByTagName("li"),
to
var links = document.getElementsByTagName("img"),
Try that. Hopefully after correcting above errors your code should work.

How do I cycle through pictures in JavaScript?

My html:
<img src="C:\Users\Shady\Downloads\restaurant\food1.jpg" alt="rotating image" width="400" height="300" id="rotator">
My Javascript:
<script type="text/javascript">
(function() {
var rotator = document.getElementById('rotator');
var imageDir = 'C:\\Users\\Shady\\Downloads\\restaurant\\';
var delayInSeconds = 5;
var images = ['food1.jpg', 'food2.jpg', 'food3.jpg', 'food4.jpg', 'food5.jpg', 'food6.jpg', 'food7.jpg', 'food8.jpg'];
var num = 0;
var changeImage = function() {
var len = images.length;
rotator.src = imageDir + images[num++];
if (num == len) {
num = 0;
}
};
setInterval(changeImage, delayInSeconds * 1000);
})();
</script>
Everything makes sense to me but for some reason it is not working. It is only showing the first picture (doesn't cycle through the pictures). Please let me know if you need anything else. Thank you.

you are getting element 'rotator' before document is loaded so it doesn't exist.
Try this:
function start() {
var rotator = document.getElementById('rotator');
var imageDir = 'C:\\Users\\Shady\\Downloads\\restaurant\\';
var delayInSeconds = 1;
var images = ['food1.jpg', 'food2.jpg', 'food3.jpg', 'food4.jpg', 'food5.jpg', 'food6.jpg', 'food7.jpg', 'food8.jpg'];
var num = 0;
var changeImage = function() {
var len = images.length;
rotator.src = imageDir + images[num++];
if (num == len) {
num = 0;
}
};
setInterval(changeImage, delayInSeconds * 1000);
};
window.onload=function(){
start();
}

Preload the images:
<script type="text/javascript">
var slideimages = new Array() // create new array to preload images
slideimages[0] = new Image() // create new instance of image object
slideimages[0].src = "firstcar.gif" // set image src property to image path, preloading image in the process
slideimages[1] = new Image()
slideimages[1].src = "secondcar.gif"
slideimages[2] = new Image()
slideimages[2].src = "thirdcar.gif"
</script>
Display the first image:
<img src="firstcar.gif" id="slide" width="100" height="56" />
Create the slideshow(cycle):
<script type="text/javascript">
//variable that will increment through the images
var step=0
function slideit(){
//if browser does not support the image object, exit.
if (!document.images)
return
document.getElementById('slide').src = slideimages[step].src
if (step<2)
step++
else
step=0
//call function "slideit()" every 2.5 seconds
setTimeout("slideit()",2500)
}
slideit()
</script>

This is how you can try...it works fine for me....
<html>
<body>
<img src="file:///C:/Users/Public/Pictures/Sample%20Pictures/test1 (2).jpg" alt="rotating image" width="400" height="300" id="rotator">
<script type="text/javascript">
(function() {
var rotator = document.getElementById('rotator');
var imageDir = 'file:///C:/Users/Public/Pictures/Sample%20Pictures/';
var delayInSeconds = 5;
var images = ['test1.jpg', 'test1 (2).jpg', 'test1 (3).jpg', 'test1 (4).jpg', 'test1 (5).jpg', 'test1 (6).jpg', 'test1 (7).jpg', 'test1 (8).jpg'];
var num = 0;
var changeImage = function() {
var len = images.length;
rotator.src = imageDir + images[num++];
if (num == len) {
num = 0;
}
};
setInterval(changeImage, delayInSeconds * 100);
})();
</script>
</body>
</html>

You try to access the DOM element with the id rotator before it got loaded.
There are two ways to bypass this problem:
You can move your script tag below the img tag, because then the javascript get's execute after the img element has been loaded:
<img src="C:\Users\Shady\Downloads\restaurant\food1.jpg" alt="rotating image" width="400" height="300" id="rotator">
<script type="text/javascript">
(function() {
var rotator = document.getElementById('rotator');
var imageDir = 'C:\\Users\\Shady\\Downloads\\restaurant\\';
var delayInSeconds = 5;
var images = ['food1.jpg', 'food2.jpg', 'food3.jpg', 'food4.jpg', 'food5.jpg', 'food6.jpg', 'food7.jpg', 'food8.jpg'];
var num = 0;
var changeImage = function() {
var len = images.length;
rotator.src = imageDir + images[num++];
if (num == len) {
num = 0;
}
};
setInterval(changeImage, delayInSeconds * 1000);
})();
</script>
You can set the onload event handler for the document to your anonymous function (or give it a name if you like):
<script type="text/javascript">
window.onload = function() {
var rotator = document.getElementById('rotator');
var imageDir = 'C:\\Users\\Shady\\Downloads\\restaurant\\';
var delayInSeconds = 5;
var images = ['food1.jpg', 'food2.jpg', 'food3.jpg', 'food4.jpg', 'food5.jpg', 'food6.jpg', 'food7.jpg', 'food8.jpg'];
var num = 0;
var changeImage = function() {
var len = images.length;
rotator.src = imageDir + images[num++];
if (num == len) {
num = 0;
}
};
setInterval(changeImage, delayInSeconds * 1000);
};
</script>