open page automatically using javascript - javascript

Essentially, all I want to do is open an external web page after the current page is loaded via java script.
open my page -> javascript tells browser to open external page -> external page being loaded into the broser
How may I accomplish this?

you may use this
<html>
<head>
<script type="text/javascript">
function load()
{
window.location.href = "http://externalpage.com";
}
</script>
</head>
<body onload="load()">
<h1>Hello World!</h1>
</body>
</html>

<html>
<head>
<script type="text/javascript">
function load()
{
window.location.href = "http://externalpage.com";
}
</script>
</head>
<body onload="load()">
<h1>Hello World!</h1>
</body>
</html>
Hope it should be window.location. Check the code.

Technically you can:
location.href = "http://example.net/";
… but you should perform an HTTP redirect instead as that is more reliable, faster and better food for search engines.

You can also use the "open" method to open the source file or url on a new window.
window.open("anyfile.*");
or
window.open("http://anylocation.com");

Hi please try this code for page loading time we will redirect whatever u configured the urls.
<!DOCTYPE html>
<html>
<head>
<script>
function myFunction() {
window.open('https://google.com');
}
</script>
</head>
<body onload="myFunction()">
</body>
</html>

<body>
<script>
document.body.innerHTML += 'Link';
document.getElementById("link").click();
</script>
<body>

Related

alert is executing before html loads

Hello my questions is about how a webpage is loaded! Here is my code:
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
</head>
<body>
<h1>Waiting</h1>
<script type="text/javascript">
alert("Why?");
</script>
</body>
</html>
I cannot for the life of me figure out why the alert is running before the heading is displayed. It is my understanding that since the alert is right above the closing body tag it will be the last thing run. Why is the page waiting for me to close out the alert before displaying the heading?
Thanks for the help!
Edit: I ran this code in firefox rather than chrome and it worked how I wanted it to - the heading displayed first before the alert ran.
You need to execute your script after the page loads with
<body onload="script();">
An external script will execute before the page loads.
<body onload="script();">
<h1>Waiting</h1>
<script type="text/javascript">
function script() {alert("Why?");}
</script>
</body>
You can use setTimeout() to show the alert after a few seconds (when the page should have loaded).
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
</head>
<body>
<h1>Waiting</h1>
<script type="text/javascript">
setTimeout(function(){
alert("Why?");
}, 1000);//wait 1000 milliseconds
</script>
</body>
</html>
You can check if the header (the h1 tag) is there and only alert if it is there.
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
</head>
<body>
<h1 id="header">Waiting</h1>
<script type="text/javascript">
var x;
x = setInterval(function(){
if(document.getElementById("header")){
alert("Why?");
clearInterval(x);
}
}, 100);
</script>
</body>
</html>
The simplest workaround code without using JQuery I could write is this. Please check it.
<!DOCTYPE html>
<html>
<head>
<title>JavaScript</title>
</head>
<body>
<h1>Waiting</h1>
<script type="text/javascript">
window.onload = function(){
setTimeout(()=>{
alert("Why?");
},10)
}
</script>
</body>
</html>
The cleanest way to do this seems like it would be to put your javascript in a separate file, and load it with the defer attribute. This will cause it to fire after the DOM loads (technically, just before DOMContentLoaded, but it doesn't work consistently across browsers unless there is a src attribute, which is why you would need to move it to an external file.
<script src="myScript.js" defer></script>
Oddly, adding some CSS to your heading could also affect this since JS is supposed to execute in order after any pending CSS.
The timeout function or a $(document).ready() function will do what you need in theory, but a timeout could need to be adjusted based on the complexity of the page, and if you aren't already using jQuery, you probably won't want to add it just to use $(document).ready().

How to get window URL after redirect?

var win = window.open('http://example.com/login');
console.log(window.location.pathname); // /login
How to get pathname after /login page redirect me to other page?
Thanks in advance.
You can use win not window to retrieve it.
console.log(win.location.pathname);
Please note that you can retrieve the path only after the redirection is completed. So I guess you can get the path data by using timer or some other events ( e.g. click ) like below:
<script>
var win = window.open('http://example.com/login');
function showChildURL(){
alert(win.location.href);
}
</script>
showChildURL
index.html
<html>
<body>
<script language="javaScript">
var win = window.open('1.html');
function showChildURL(){
alert(win.location.pathname);
}
</script>
showChildURL
</body>
</html>
1.html
<html>
<head>
<meta http-equiv="refresh" content="0;URL='2.html'" />
</head>
<body>
<p>This page will be redirected to 2.html</p>
</body>
</html>
2.html
<html>
<body>
This is 2.html
</body>
</html>
Hope this helps.
What you want to achive is communication between browser tabs/windows. You'll have to use cookie or localStorage to notify your main window about redirected url. Take a look at LocalConnection.

JavaScript code in iframe

I need to run JavaScript code in iframe. But script with id "us" loaded after creating iframe. How to run this javascript in iframe?
<iframe id="preview">
#document
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script id="us" type="text/javascript">
$("#preview").ready(function() {
$(".test").click(function() {
alert(true);
});
});
</script>
</head>
<body>
<style></style>
<div class="test"></div>
</body>
</html>
</iframe>
Thanks in advance.
The IFrame has no access to what's outside of it. Everything inside IFrame is separate page ergo you threat it like so. So you do your document.ready in it.
Example: http://jsfiddle.net/ZTJUB/
// Since this is page you wait until it's loaded
$(function() {
$(".test").click(function() {
alert(true);
});
});
The jQuery instance inside of the iFrame doesn't know it's supposed to be traversing the parent DOM, so therefore it won't know where to look for an element with the id "preview"
As per my comments above, you should attach to the iframe's document.ready, like this:
// Since this is page you wait until it's loaded
$(document).ready(function() {
$(".test").click(function() {
alert(true);
});
});
EDIT:
Just realizing you are probably having an entirely different issue here - Html code as IFRAME source rather than a URL - if you are trying to embed the iframe code inline, you are going to have problems. Take the following code for example:
<html>
<head></head>
<body>
Some stuff here
<iframe id="preview">
<html>
<head>
<script src="http://code.jquery.com/jquery-latest.min.js"></script>
<script id="us" type="text/javascript">
$(document).ready(function() {
$(".test").click(function() {
alert(true);
});
});
</script>
</head>
<body>
<style></style>
<div class="test">test</div>
</body>
</html>
</iframe>
</body>
</html>
if you render that page in firefox, and then inspect the source in firebug, you'll see:
<html>
<head></head>
<body>
Some stuff here
<iframe id="preview">
<html>
<head></head>
<body></body>
</html>
</iframe>
</body>
</html>
This is happening because the browser isn't expecting to see the code inline between the iframe tags.
Since you're not addressing the questions in the comments to better clarify what you are trying to do... I shall assume you are trying to access content IN your iframe FROM your parent page. Since the other answer should work fine if trying to run it from within the iframe.
On the parent page try something like:
$(function() {
$("#preview").load(function ()
$("#preview").contents().find(".test").click(function() {alert(true);});
});
});
*This assumes both parent and iframe are on the same domain.

Execute JS on page load without using jQuery

So I know that if you use jQuery you can use $(document).load(function(){}); so that any code you write into the function gets executed after the whole page has loaded, but is there a way of doing something similar if you don't use jQuery and just use JS?
For example...
<html>
<head>
<script type="text/javascript">
var box = document.getElementById('box');
alert(box);
</script>
</head>
<body>
<div id="box" style="width:200px; height:200px; background-color:#999;
margin:20px;"></div>
</body>
</html>
If I use this method the alert just says null. So is there a way of making the js code run once the page has loaded?
I use:
<script type="text/javascript">
window.onload = function(){
//do stuff here
};
</script>
This way you don't have to use any onload tags in your html.
The easiest way is to simply put your script at the end of the document, typically just before the closing body tag:
<html>
<head>
</head>
<body>
<div id="box" style="width:200px; height:200px; background-color:#999; margin:20px;"></div>
<script type="text/javascript">
var box = document.getElementById('box');
alert(box);
</script>
</body>
</html>
You can use a variety of methods to accomplish this.
The simplest, easiest method would be to simply add the script tag at the end of your body tag:
<html>
<head>
<title> Example </title>
</head>
<body>
<div>
<p>Hello</p>
</div>
<script type="text/javascript">
// Do stuff here
</script>
</body>
</html>
The way jQuery does it is something similar to:
window.onload = function() {
// Do stuff here
}
I usually just do it the second way, just in case.
To ensure cross-browser compatibility, crawl through the source of jQuery and find what they use.
You can use onload in your body tag.
<head>
<script type="text/javascript">
function doSomething() {
//your code here
}
</script>
</head>
<body onload="doSomething()">

Access JavaScript function in a programatically iFrame

I am trying to access a JavaScript function in a programatically created iFrame from a JavaScript function outside. I tried several ways, but was not successful. L ike window.frames['frameid'], etc.
Could you please provide me the correct syntax?
Yes, they are in the same domain. Actually, I am using ExtJS framework. I have a JSP inside an iFrame, I would like to call the javascript functions in the JSP from the a javascript function outside which is basically in a JS file.
Here's a more appropriate example based on your comments ;)
The main page
<html>
<head>
<title>Main Page</title>
</head>
<body>
<iframe src="iframe.html"></iframe>
<script>
var receiver = {
listen:function(msg){
alert(msg);
}
};
</script>
</body>
</html>
The iframe page: iframe.html, but can be a JSP with similar output
<html>
<head>
<title>iframe page</title>
<script src="external.js"></script>
</head>
<body>
<!-- some content here -->
<script>
externalFunction('hello', window);
</script>
</body>
</html>
And the JS file: external.js
function externalFunction(msg, w){
w.parent.receiver.listen(msg);
}
Place those 3 files in the same directory and open the main page.
You should get a popup with "hello".

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