Checkbox toggle in Chrome and Opera

[Rain_Lover]

Steps to reproduce the issue:

1. In your browser Settings select Continue where you/I left off under On startup.
   
2. Navigate to the demo [demostudio.github.io].
   
3. Check the checkbox.
   
4. Edit the text.
   
5. Close your browser and reopen it. Or duplicate/clone the tab.
   

Now as you see the checkbox is checked, but the textarea isn't colored.
I tried it in the latest version of Chrome and Opera in Windows 10. I'm not sure about Safari, but it probably behaves the same way.

Questions:

• Why does it happen?
  
• What's a cross-browser solution?

[Fotiman]

I suspect that browsers store the state of checkboxes, but maybe not the state of inline styles. Since that demo changes the style "onchange", and setting the checked state of a checkbox programmatically doesn't trigger onchange events, I suspect you would need to add an onload event handler to run as well, which could then check the state of the checkbox.