Download Image triggers page re-load and loss of data in Chrome

[rdtrimble]

In Chrome Version 89.0.4389.128

Clicking "Save image ⇓" downloads the image but it also triggers a reload of the page. This is a problem as the page re-load does not persist the user entered data leading to total loss of work entered so far.

Immediate fix:
change the text to WARN USER they must save the json file first!

Perhaps an actual fix, seems to work when I edit the code in my browser:

Add the attribute
target="_blank"
to the <a id="pngdownload" ... target="_blank"></a> element.

Possible other fix but more of a feature request:
Persist user entered data between sessions through localstorage?

[csaladenes]

In Chrome Version 89.0.4389.128

Clicking "Save image ⇓" downloads the image but it also triggers a reload of the page. This is a problem as the page re-load does not persist the user entered data leading to total loss of work entered so far.

Immediate fix:
change the text to WARN USER they must save the json file first!

Perhaps an actual fix, seems to work when I edit the code in my browser:

Add the attribute
target="_blank"
to the <a id="pngdownload" ... target="_blank"></a> element.

Possible other fix but more of a feature request:
Persist user entered data between sessions through localstorage?

Cool, see #18