Saving, restoring and continuing a d3-force page

[FightingBugs]

Hi everybody,

is there a way to save a running d3-force page, using
Ctrl-S (save the page) with the browser, stop the browser
and then reload the page next day and continue the
force simulation?

Before storing the page I set the friction value to 1
in order to freeze the simulation. Then i saved the page
using Ctrl-S with the browser (firefox) and closed the
browser.

When I reloaded the saved page next day, I saw the last state
of the simualtion on the screen and could change the
friction value to less than 1, say 0,5.
But the force simulation did not continue, it did not
start at all. It was only possible to start a new simualtion.
The old simulation looked as being a backgound image.

What can be done for the force-simulation to continue
the old simulation?

[Fil]

Here's an example where we save (some of) the postions in localStorage, so we can restart where we were. Maybe you can improve on it?
https://observablehq.com/@fil/save-a-force-directed-graph-to-localstorage

[FightingBugs]

Hi Fil,
I tried this page and receiver 3 errors, when reopening the page, sorry they are in german,
perhaps you understand something. else I would try to translate.
Errors messages:

1. Das content-Attribut von Window-Objekten sollte nicht mehr verwendet werden. Bitte verwenden Sie stattdessen window.top. worker.js:2:70521
2. 'postMessage' konnte auf 'DOMWindow' nicht ausgeführt werden: Der angegebene Ziel-Ursprung (origin - 'https://observablehq.com') stimmt nicht mit dem Empfängerfenster-Ursprung überein ('null'). worker.html
3. Fehler beim Verarbeiten des Wertes für '-webkit-text-size-adjust'. Deklaration ignoriert. worker.html:6:846

thank you

​

[Fil]

I don't know. If access to localStorage is disabled for some reason, I suppose it would bring up this error. It works for me (with Firefox, in an incognito window).

[FightingBugs]

I think this is a good idea. My Ubuntu system with firefox sometimes disables localStorage.
I will boot and try it again
Thanks

[FightingBugs]

Having booted I saved the page again, closed and restarted the firefox and received a lot of warnings and one error message after reopening the page:
'postMessage' konnte auf 'DOMWindow' nicht ausgeführt werden: Der angegebene Ziel-Ursprung (origin - 'https://observablehq.com') stimmt nicht mit dem Empfängerfenster-Ursprung überein ('null'). worker.html

The message means postMessage could not be executed on DOMWindow. Origin and receiver are different.

Thanks

[Fil]

I'm sorry I don't know, I'll ask if someone has an idea. I'm keeping the issue closed since it seems related to observable and your browser, not to d3-force.