iFrame change source multiple times - javascript

I made an iFrame and would like to change it's source when it's load to next of 10 different sources:
It would look like this:
iframe loaded => change to example.com => iframe loaded => change to example1.com => iframe loaded => change to example2.com...
Is there any way to do this? ... I'm stuck on this and have no idea what can i do:
<html>
<body>
<iframe src="http://www.example.com"> </iframe>
<script>
var links = [
"http://www.js.com",
"http://example.com",
"http://example1.com"];
alert(links[2])
function srca (){
document.getElementsByTagName('iframe')[0].src = links[0]
}
</script>
</body>
</html>

You were almost there, you just forgot to hook into some kind of event (like onload)..
Just to get you started, here ya go:
<html>
<head>
<script>
var links = [ 'http://www.js.com'
, 'http://example.com'
, 'http://example1.com'
]
, lnkCnt = 0
;
function srca(){
links.length > lnkCnt && (
document.getElementsByTagName('iframe')[0].src = links[lnkCnt++]
);
}
</script>
</head>
<body>
<iframe src="about:blank" onload="setTimeout(srca, 2000);"></iframe>
</body>
</html>

Related

How can I use JavaScript to view the source code of all websites?

I want to have JavaScript to get a user's URL and return the source code of the website. I want to have this to essentially make an iframe, but with the actual code.
E.g. :
let userUrl = prompt("What website do you want displayed?","e.g. https://www.google.com");
function getSource(url){
//some code
return pageSource;
}
document.body.innerHtml=getSource(userUrl);
I tried to scrape a view page source website and turn it into an API that I could inject into JavaScript, but I had no luck.
<html>
<head><meta charset="us-ascii">
<title></title>
<script>
let userUrl = prompt("What website do you want displayed?","e.g.
https://www.google.com");
if (userUrl){
var srcFrame=""; //complete page code to inject into your iframe or return
var fetchMe = "https://example.com?q=" + userUrl;
fetch(fetchMe).then((response) => response.text()).then((text) => {
srcFrame = text;
//if injecting into iframe
myFrame.document.open();
myFrame.document.write(srcFrame);
myFrame.document.close();
// USE THE FOLLOWING TO ADD THE ORIGINAL URL AS THE baseURI SO RELATIVE
//LINKS & SCRIPTS WILL WORK AND ACCESS THE ORIGINAL SOURCE AND NOT YOUR
//SERVER
var addOrigBase= document.createElement('base');
addOrigBase.setAttribute('href',userUrl);
document.getElementById("myFrame").contentDocument.head.appendChild(addOrigBase);
});
};
</script>
</head>
<body>
<iframe onload="myFrame.frameElement.height =
(myFrame.frameElement.contentDocument.body.clientHeight)+10" frameborder=""
height="25px" id="myFrame" name="myFrame" scrolling="no" src="about:blank"
width="100%"></iframe>
</body>
</html>

Is it possible to access a array that is outside an iframe?

The problem is this: inside my main page (parent.html) I have an iframe (child.html) and a script block. In that script block there is a array of integers and a function that adds elements to the list. In the iframe there is a new function that adds an element to the list of the main file (parent.html).
I would like to know if it is possible for the iframe (child.html) to access this function found in parent.html. Example:
parent.html
<html>
<head>
<title>Parent</title>
<script>
var parentList = [0];
var counter = 0;
function addValue(){
counter++;
parentList.push(counter);
console.log('parent', parentList);
}
</script>
</head>
<body>
<button onclick="addValue()">Add Value (Parent)</button>
<br />
<iframe src="child.html" allowfullscreen></iframe>
</body>
</html>
child.html
<html>
<head>
<title>Child</title>
</head>
<body>
<button onclick="addValueInternal()">Add Value Child</button>
<script>
var internalCount = 0;
function addValueInternal() {
internalCount++;
parentList.push(internalCount);
console.log('child', parentList);
}
</script>
</body>
</html>
The error:
child.html:12 Uncaught ReferenceError: parentList is not defined
at addValueInternal (child.html:12)
at HTMLButtonElement.onclick (child.html:6)
Yes. it is possible. Based on an example calling a function defined in the parent from an embedded iframe.
So in your case, you would have to reference the parent when accessing your array.
function addValueInternal() {
internalCount++;
parent.parentList.push(internalCount); // here we access the reference
console.log('child', parentList);
}
Be aware that you may encounter problems concerning the cross-origin policy afterwards.

How to insert variable into <img> src parameter?

I am trying to generate QR code on my webpage with a data (id) I get from web service. I can not figure out how to insert a javascript variable as a part of <img> src parameter.
As you can see I can change the src using myFunction (AFTER button clicked). But I do not know how to insert id variable to the initial page load (to replace ID1_GOES_HERE at the end of img line).
Please help!
Here is a code:
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>TEST</title>
</head>
<body>
<script>
var id1 = "41c0236f-ed21-4182-be3d-26513078f704";
function myFunction(){
var id2 = "41c0236f-ed21-4182-be3d-26513078f704";
document.getElementById('qr_img').src="http://chart.apis.google.com/chart?cht=qr&chs=300x300&chld=H|0&chl="+id2;
}
</script>
<img id="qr_img" src="http://chart.apis.google.com/chart?cht=qr&chs=300x300&chld=H|0&chl=ID1_GOES_HERE"/>
<button onclick="myFunction()">test</button>
</body>
</html>
Don't use a button click handler, just call the function from your script:
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<title>TEST</title>
</head>
<body>
<script>
var id1 = "41c0236f-ed21-4182-be3d-26513078f704";
function myFunction(){
var id2 = "41c0236f-ed21-4182-be3d-26513078f704";
document.getElementById('qr_img').src = document.getElementById('qr_img').src + id2;
}
myFunction();
</script>
<img id="qr_img" src="http://chart.apis.google.com/chart?cht=qr&chs=300x300&chld=H|0&chl="/>
<button>test</button>
</body>
</html>
The click handler is used to capture the button click event, and do something at that time. That's not what you want, so remove the button click handler.
At the end of the <script> element, simply call myFunction() to do what it's intended for.
If you wanted to run the script after the entire document and all of its dependencies were loaded, you could do this:
<script>
var id1 = "41c0236f-ed21-4182-be3d-26513078f704";
function myFunction(){
var id2 = "41c0236f-ed21-4182-be3d-26513078f704";
document.getElementById('qr_img').src = document.getElementById('qr_img').src + id2;
}
document.onload = myFunction();
</script>
For this simple case, you probably don't actually need a function at all, and the body of myFunction can simply be placed inline, like so:
<script>
var id1 = "41c0236f-ed21-4182-be3d-26513078f704";
var id2 = "41c0236f-ed21-4182-be3d-26513078f704";
document.getElementById('qr_img').src = document.getElementById('qr_img').src + id2;
</script>
The function would be useful if you had more logic involved, and needed to organize (or modularize) it.
You could add this to your script below where you declared and set the id1 variable
function Window_OnLoad ()
{
document.getElementById("qr_img").src="http://chart.apis.google.com/chart?cht=qr&chs=300x300&chld=H|0&chl="+id1;
}

Pass a Javascript Object to an HTML iframe (as an Object)

A MainWindow creates a JavaScript object that the ChildWindow needs to utilize utilize.
My MainWindow.html looks like this at the moment
<html>
<body>
<script>
var varObject = {type:"Error", message:"Lots"};
</script>
<iframe class="child" src="ChildWindow.html"></iframe>
</body>
</html>
The ChildWindow.html looks like this
<html>
<body>
<script>
console.log(varObject.type); // goal is to log "Error"
</script>
</body>
</html>
The ChildWindow is trying to use the object that was created in the MainWindow which of course it can't because I don't yet know how to pass it.
I've tried to Google this but most of the solutions I found involved passing the values as strings instead of as a variable.
One can simply pass the object by assigning the object to the window of the iframe.
in the parent window:
var frame = document.querySelector("iframe");
frame.contentWindow.object_of_interest = object_of_interest;
in the iframe'ed window
console.log(window.object_of_interest);
Please have a look at following code :
<html>
<body>
<script>
var varObject = {type:"Error", message:"Lots"};
var child = document.getElementsByClassName("child")[0];
var childWindow = child.contentWindow;
childWindow.postMessage(JSON.stringify(varObject),*);
</script>
<iframe class="child" src="ChildWindow.html"></iframe>
</body>
</html>
In ChildWindow.html
<html>
<body>
<script>
function getData(e){
let data = JSON.parse(e.data);
console.log(data);
}
if(window.addEventListener){
window.addEventListener("message", getData, false);
} else {
window.attachEvent("onmessage", getData);
}
</script>
</body>
</html>
Hope it helps :)
You should use window.postMessage to send messages to and from iFrames embedded in your site.

IE hack for javascript & iframe

I have a site with URL links on a Links page. Each link takes you to a Frame page that is a big iFrame that pulls in the given URL. I'm using javascript to do this and it works in FF, Safari, Opera and Chrome, but not IE. Does anyone know what I can do to get it to work in IE?
I've built it in WordPress. I have this in Head section between tags and tags:
<script type="text/javascript" language="javascript">
function loadIF() {
iFrameSrc=location.href.split('?');
if ( iFrameSrc[1] != null ) {
document.getElementById('external').src=iFrameSrc[1];
}
else {
document.getElementById('external').src='default_page.htm'
}
}
</script>
Then I put this in header.php as well:
<body onload="loadIF()" <?php body_class(); ?>>
Here is the link markup:
Website
Thanks-
Chris
You seem to be splitting the location on the ? does that mean you are trying to get the parameters?
if so:
iFrameSrc = location.search;
if(iFrameSrc)
{
... // Code here
}
else
{
... // Code here
}
or try
if(iFrame && iFrame.length > 2)
{
... // Code here
}
else
{
... // Code here
}
EDIT ok so after seeing your edit i thought i better add this:
Take the first code example I gave you and replace the first ... // Code here with:
document.getElementById('external').src= iFrameSrc.substr(1); // This will remove the leading question mark.
UPDATE
<html>
<head>
<title></title>
<script type="text/javascript">
function iFrameIF()
{
iFrameSrc = location.search;
if (iFrameSrc)
{
alert(iFrameSrc.substr(1));//document.getElementById('external').src = iFrameSrc.substr(1);
}
else
{
alert(); //document.getElementById('external').src = 'http://about:blank'
}
}
</script>
</head>
<body onload="iFrameIF()">
<iframe width="100%" height="1000" marginheight="1" marginwidth="1" align="top" allowtransparency="true" frameborder="0" name="external" id="external"></iframe>
<br />
</body>
</html>
typing into ie: file://path/to/file.html?test got me an alert saying "test"

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