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Change Spotfire Document Properties value using javascript

I want to Change the value assigned to a Document Property in spot fire. Lets say i have created a new document property called "Test1" as a string and assign it a value "a". Is there are way to change this value using Javascript every time i load the spotfire dashboard ?

I'm unaware of a way to use JavaScript for this, but you can assign a string document property via custom expression (if it's a List Box) or run an IronPython script each time the value changes. So, you could set the expression to the current date, datetimenow() and then every time it's loaded the IronPython script would fire. However, I don't see why you'd need the property control for this.
I suppose it really depends on what you want the document property to be set to. Is it data from your tables? Output from complex code? These are all things to consider.

1) Create an input type property control using the Document Property you want to change.
2) Edit Html to assign parent element an id say "testInput". And add the script as shown below in the Edit HTML window.
<span id="testInput"><SpotfireControl id="7db34e6c423240f59fc99e6b80fa23ec" /></span>
<script>
$("#testInput input").val("after");
$("#testInput input").focus();
$("#testInput input").blur();
</script>
3) This script will change the document property value to "after" whenever you open a file.

As you comment seemed to suggest, something you can do is write this code in Python and attach the script to an action control, e.i. a Link or a Button. Something simple like: Document.Properties["Test1"] = newValue
or even: Document.Properties[changingProperty] = newValue
allowing the code to be more reusable.
Then you insert Javascript into the Text Area as well to the effect of: $("#VeryLongSpotfireControlID").click();
Which should simulate clicking on action control, which in turn triggers the Python script to update the value. Just be careful not to use this approach when it would result in reloading the text area HTML, as this will re-trigger the Javascript, thus creating an endless loop.

I believe I have found a possible solution/work-around for the issue, entirely based on pure JavaScript (since TIBCO removed jQuery starting from Spotfire X). The solution is to force a simulated Enter Keystroke while focusing the input box to trigger updating the Document Property. (No data function and R needed)
HTML (SpotfireControl Element is an single line input-box for a Doc. Prop.):
<div id="container"><SpotfireControl id="b8534f13dc62416db6d4eaab16030f5e" /></div>
JS (focus and blur might no longer be needed for this solution, but I'm still keeping them just in case):
const inputConfirmationEvent = new KeyboardEvent("keypress", {
    keyCode: 13,
    bubbles: true,
    cancelable: false
});
var elem = document.querySelector("#container input");
elem.value = "stringValue";
elem.blur();
elem.focus();
document.querySelector("#container input").dispatchEvent(inputConfirmationEvent);
Hope it helps someone.
Best,
Aaron

View onclick data via Chrome Extension

I want to pull the onclick information from an a tag. I know how to do this normally and I've confirmed it works via the console. However, it returns null when attempted through an extension. Is this possible via an extension and if so: what strange method must be employed?
Example:
On the page: text
I'd like to be able to grab that something(stuff,otherstuff).
However, pure JS didn't work: String(document.getElementsByTagName("a")[10].onclick)
And neither did jQuery: String($(".tableclass").find("tbody").find("a")[10].onclick)
Both of the above working when entered into the console.

First of all, you can never read the onclick property that was set by a page because extension code runs in an isolated scope.
Secondly, even if the code was not isolated, the onclick property of <a onclick="foo"></a> may not have the value foo you are expecting. That is because a property is not the same thing as an HTML attribute.
Therefore, if you want to access the string value of an onclick attribute you can and should use linkElement.getAttribute('onclick'); instead.

Is this what you mean, that you want to change a href of the link? You can do it like this:
html:
<a href='foo' class='link-to-swap'>link</a>
javascript:
$(document).ready(function(){
$('.link-to-swap').click(function(e){
e.preventDefault();
var grabbedData = $(this).attr('data-id')
$(this).attr('href',grabbedData)
return false
})
})
here is the fiddle:
https://jsfiddle.net/cp6x9pf5/1/

Javascript Variable in Url.Content

I have a javascript variable called locid that I am trying to use as part of a URL by setting the data-url of a div as follows:
data-url='#Url.Content("~/Catalogue_Items/ItemsActionViewPartial/")#Model.CatItemID?LocationID=locid&AsyncUpdateID=catalogue-view'>
I know I can't just throw the locid in that string as I have done in my sample code but I just put it there to illustrate where I need my javascript variable to be. How can I achieve this??

The problem here is #url.content needs to be run on server, where JavaScript variable is not visible. Write an independent AJAX call to fetch content and than set content in data-url

You cannot use the Javascript variable directly into attribute.
A workaround can be to reorder the parameters of your url and setting the JavaScript variable in script tag.
<button id="myButton" data-url='#Url.Content("~/Catalogue_Items/ItemsActionViewPartial/")#Model.CatItemID?AsyncUpdateID=catalogue-view'></button>
I have reordered the url parameters here. The location parameter will be set by following script. Place this script just after the button element.
<script>
var button = document.getElementById('myButton');
var url=button.getAttribute('data-url');
url+="&LocationID=" + locid;
button.setAttribute('data-url',url);
</script>

You can put the value in the page using document.write, but you can't write it out inside the tag, you have to write out the entire tag. Example:
<script>
document.write('<div data-url="#Url.Content("~/Catalogue_Items/ItemsActionViewPartial/")#Model.CatItemID?LocationID=' + locid + '&AsyncUpdateID=catalogue-view">');
</script>

Javascript | passing string variable to onclick event not working

I am trying to open a popup windows but the button's onclick content is stored in a variable. Thsi is my approach:
var page = 'window.open(\'ticket.html?wallet='+global_wallet+'\',\'popUpWindow\');';
document.getElementById('EditButton').onclick=page;
This is not working. Not popup being displayed. Something is missing and i don't figure out what is it...
Regards,

The onclick property is supposed to be a JavaScript function, not a string like you are trying.
You can pass a function:
document.getElementById('EditButton').onclick = function(){
window.open('ticket.html?wallet='+global_wallet,'popUpWindow');
};
Or if for some reason you have to use the string, you can set the onclick attribute. In this case you need to use setAttibute() instead of the onclick property.
document.getElementById('EditButton').setAttribute('onclick', page);

trying to access rel attribute of <a> using javascript

I am using an javascript overlay in my site for my subscription form. I have loaded the code for overlay from net. It is in javascript. Now the thing is to trigger the overlay function using a link i need put some value under <a rel="">.
more specifically, click
But i dont want to put a tag instead i want to link to the subscription page using javascript function. Now my problem is how or where do i put the value under 'rel' attribute in my javascript to get the same result???

Like this:
A

If you want to use plain JS without jQuery, try setAttribute: https://developer.mozilla.org/en/DOM/element.setAttribute
Give your tag an id attribute and then you can add:
document.getElementById("your_id").setAttribute("rel", "gb_page_center[450, 450]");

Using jQuery, this can be accomplished quite cleanly by using the .attr() method:
$('a').attr('rel', 'gb_page_center[450, 450]');