In my web application, the user can open a popup window to select an edit an object. When the user presses OK on the popup, it's supposed to update the src of an iframe in the parent window (and of course reload the iframe) according to which object was selected.
My function (in the parent window) is:
function dismissEditPopup(win, newId) {
newId = html_unescape(newId);
var elem_iframe = document.getElementById("iframe_id");
// (*) this line doesn't work
elem_iframe.src = '/view_object/' + newId;
elem_iframe.contentWindow.location.reload();
win.close();
}
This function is called from a popup window, which contains a script:
<script type="text/javascript">
opener.dismissEditPopup(window, "hash_of_new_object");
</script>
The problem is that the line (*) fails silently. In the inspector in both Firefox 3.6 and Google Chromium, I see that the src attribute of the iframe is being updated, but elem_iframe.contentWindow.location.href is unchanged. (If I add a line elem_iframe.contentWindow.location.href = elem_iframe.src;, the assignment is ignored.). There are no errors in the Javascript error console. Strangely, it does work as expected if I assign to elem_iframe.src from the Javascript console.
I am able to change the value of a hidden <input> field in the same way, using document.getElementById("hidden_id").value = newId;.
Everything is served from the same website.
(Similar to Changing iframe src with Javascript, but the answers to that question don't work, presumably because the code is called from a popup.)
Take this line out:
elem_iframe.contentWindow.location.reload();
It's reloading the iframe and the new src is not loaded.
Related
Here's a sample code:
HTML
<script> alert('This is alert!') </script>
JS
window.alert = function(data) //alert() over-riding
{
console.log("Alert over-ridden");
}
Issue:
HTML
<iframe src=javascript:alert('Iframealert')>
JS
window.alert = function(data) //alert() over-riding
{
console.log("Alert over-ridden"); //This doesn't execute - I mean, this over-ride function is not called when the above iframe alert is executed
}
I knew iframe in another document is not applicable for parent over-riding (due to same domain policy), but, the src JS execution happens only in the parent.
So, how do I over-ride alert() which is applicable to above iframe tag?
Update 1:
The HTML code is static, and I cannot make any modifications to it. I can only write some JS and append to the HTML.
Is there any way to over-ride the alert() of nested browsing window?
Nice question! The answer starts by looking at the rules for what happens when the src attribute is evaluated.
When this happens, the spec follows a number of steps during navigation. We end up step 14, which pertains to javascript: schemes.
Within that step, there are a series of sub-steps, one of which is:
Create a script, using script source as the script source, address as the script source URL, JavaScript as the scripting language, and the script settings object of the Window object of the active document of the browsing context being navigated.
The important thing here is "the Window object of the active document of the browsing context being navigated". Because you're navigating an <iframe>, you're actually dealing with a Nested Browsing Context, which has it's own window, so having overridden the parent window.alert makes no difference.
You can, however, override the alert of the inner window:
document.getElementById('myIframe').contentWindow.alert = function(msg) {
console.log('Overridden iframe: ' + msg);
}
This will only work for the javascript: scheme url presented to the src attribute, as at the time this code executes we were simply trying to get the address of the page to navigate the <iframe> to. When navigation actually occurs, a new Document object with it's own window is created in step 23 of the navigation steps, at which point you lose your overridden alert.
This also relies on setting the src attribute using JavaScript after you've overridden the alert, you can't use an inline src attribute on the element as the element needs to be in the page to get hold of it and it's contentWindow, and putting it in the page means the src will get evaluated.
Here's a fiddle demonstrating the overriding of the alert within the <iframe>'s src attribute.
I am opening a new window on clicking a hyper link.
Issue:
After minimizing the window, again if I click on hyper link, the same window should be opened(In chrome minimized window will open up). But this is not happening in firefox and IE. Can anyone please help.
<html>
<head></head>
<body>
<p>Visit our HTML tutorial</p>
</body>
</html>
window.open allows you to specify a unique identifier to your popup; this allows you to open many links always in the same popup window.
If you use different identifiers on different links, it should open multiple popup windows.
<p>
Visit our HTML tutorial
</p>
<p>
Visit our HTML tutorial
</p>
If the strWindowFeatures parameter is used and no size features are defined, then the new window dimensions will be the same as the dimensions of the most recently rendered window.
you might want to check this link
window.open web api for mozilla
The idea of Unique ID in the parameter's list simply doesn't work as suggested in another answer.
You need a function for to do what you need in IE and FF. The trick is to get a function to see if it has opened a window before and do nothing if it has.
<script>
var opened = false;
function openWindow(){
if (!opened) {
w = window.open('', 'test', 'width=1500, height=900');
w.location = "http://www.google.com";;
w.onload = function() {
w.onunload = function() {
opened = false;
};
};
opened = true;
}
}
</script>
I'm using the opened global variable to track this. We set the newly created window to set false to this variable when it closes. Now the function can decide if it should really open a new window. Please note the following points:
We use onLoad function of the new window to set onUnload. Because IE seems to replace whatever the event handlers set here soon after it loads the page.
You can see that we first open a blank window and then set the url of it. This is because IE returns nothing when opening a new window if it is from another domain.
SUMMARY:
In MSIE 11, in a popup window when I fill a certain field with data it stays filled, or not, depending on if the popup window has window.close() called on it. Can't repeat with other browsers.
DETAILS:
I have a popup web page (a JSP page, if it matters to someone) I use to fill existing fields in a web form. I added a new field and it is filling OK -- sometimes.
Here is the pertinent section of the page, cleaned up for presentation. My actual page doesn't hard-code emails in the Javascript object.
function fillForm() {
var parentWindowOrder = window.opener.salesOrder;
var formData = parentWindowOrder.workingData;
[snip]
var xferEmails = {"emails":["jerome#myserver.com","jerome2#otherserver.com"]};
formData.user_emails = xferEmails.emails;
[snip]
}
window.close(); // HERE IS THE TOGGLE OF MY PROBLEM
In MSIE, if window.close() is disabled (commented out) then everything works OK. Elsewhere in the page the formData.user_emails can be referenced OK. Of course, the popup page still exists and must be manually closed. When using the console the query yields:
>formData.user_emails
["jerome#myserver.com","jerome2#otherserver.com"]
In MSIE, if window.close() is executed in the popup then the popup closes, of course. However, the values stored aren't preserved. When in the popup window itself, either before or after calling window.close(), the field is set and stays set. But after that the values are gone:
>formData.user_emails
{}
In other browsers I get the success condition.
Normally you'd say "You're changing the value elsewhere in your code"; however, I've already swept through my code looking for other references. Here, shown above, is the only place it gets set in my scenario.
In my practice other fills of variables through JSON-like syntax (xferEmails) works OK, even in MSIE. Not this particular one. What with window.close() could influence this?
Thanks for replies,
Jerome.
formData is initialized in the popup opened and within the scope of fillForm function. This is assigned to salesOrder variable of parent window. Did you re-initialize formData with salesOrder in parent window? If you didn't then it should be accessible via salesOrder.
In my extension I want to open a new tab when a toolbar button is clicked (works), display a static HTML page with JavaScript on the tab (works) and pass data (URL from the originating page) to the new tab (does not work). I tried:
Using query parameters like myTab.url = safari.extension.baseURI + 'page.html?' + params, but the target page does not seem to have a location assigned (location.search giving no result).
myTab.page.dispatchMessage("url", "someUrl"); after opening the tab, but the message never arrives in the new tab (I suspect, it's already "through", when the tab has opened).
Any suggestions?
I parsed document.URL in opened page for specific parameter and it worked for me. E.g.
function __onLoad()
{
var p = $.url(document.URL);
alert(p.param("url"));
}
And two possible reasons for missed message:
You did not add message event listener on your page
You called dispatchMessage before event listener was added
Check Safari development doc at https://developer.apple.com/library/archive/documentation/Tools/Conceptual/SafariExtensionGuide/MessagesandProxies/MessagesandProxies.html
I'm attempting to convert a Greasemonky script to an extension for Firefox and I'm trying to make my extension automatically attach a simple script to any webpage when a new tab is opened. I'm converting the script from Greasemonkey because I'd like to take advantage of advanced preferences and menu options.
I access the tab using this:
var container = gBrowser.tabContainer;
container.addEventListener("TabOpen", tabAdded, false);
function tabAdded(event) {
var newtabwindow = event.target.____ //I don't know what goes here
//attach script to newtabwindow
}
and my goal is to append the script to the document in the new tab once it loads using this function:
function scriptrunner(targetwindow) {
var myScript = targetwindow.content.document.createElement('script');
myScript.type = 'text/javascript';
myScript.setAttribute('src','chrome://addonname/content/addonscript.js');
targetwindow.content.document.getElementsByTagName('head')[0].appendChild(myScript);
}
This function works fine to attach the script to the current page when attached to a toolbar button with oncommand="scriptrunner(window)", but I don't know how I could access the window in the newly opened tab, or if I should cut out the window from the equation and access the document another way.
You are looking for contentWindow, which is a property of the browser element.
Given a tab, call gBrowser.getBrowserForTab to acquire the browser element associated with the tab. Then access either contentDocument or contentWindow property of the browser element (these are equivalent to the document and window objects you should already be familiar with).
Also -- if I'm not mistaken -- you'll need to listen for the "load" event of the contentWindow in addition to listening to events for the tab.