I can't get Yanfly's option core to work correctly.

[Narugami]

Plugins Used:
http://yanfly.moe/2015/10/09/yep-1-core-engine/
http://yanfly.moe/2018/04/13/yep-165-options-core-rpg-maker-mv/
http://yanfly.moe/2018/01/19/yep-162-advanced-switches-and-variables-rpg-maker-mv/

I'll try to explain my problem as best as I can. If I alter the default settings for any option of the plugin it doesn't work. Just as an example If I want the games sound to be at 80% by default after starting up the game for the first time, it is always 100% even if I put it like that.

//Default Config
ConfigManager[symbol] = 80;

Or another example I want to create an option that controls a switch so I make it like that.

//In the Options Pluign:
// Make Option:
this.addCommand(name, symbol, enabled, ext);

//Draw Option:
var rect = this.itemRectForText(index);
var statusWidth = this.statusWidth();
var titleWidth = rect.width - statusWidth;
this.resetTextColor();
this.changePaintOpacity(this.isCommandEnabled(index));
this.drawOptionsName(index);
this.drawOptionsOnOff(index);

//Press OK:
var index = this.index();
var symbol = this.commandSymbol(index);
var value = this.getConfigValue(symbol);
this.changeValue(symbol, !value);

//Crusor Right:
var index = this.index();
var symbol = this.commandSymbol(index);
var value = this.getConfigValue(symbol);
this.changeValue(symbol, true);

//Crusor Left:
var index = this.index();
var symbol = this.commandSymbol(index);
var value = this.getConfigValue(symbol);
this.changeValue(symbol, false);

//Default Config
ConfigManager[symbol] = true;

//Save Config
config[symbol] = ConfigManager[symbol];

//Load Cofing
ConfigManager[symbol] = !!config[symbol];

It works fine except for the default to be true. It's always off on default.
For the Switch that should be controlled by this, I use this:

Eval: ConfigManager['exampleoption']

So my issue with this is that I can't set first time startup defaults for the yanfly options core plugin. Does anyone have an idea what is wrong with this? I already tried to make a new project with only these three plugins and got the same result.

 

[caethyril]

If you change the Load Config code to this, does it work?

if (config[symbol] !== undefined) ConfigManager[symbol] = !!config[symbol];

 

[Narugami]

If you change the Load Config code to this, does it work?

if (config[symbol] !== undefined) ConfigManager[symbol] = !!config[symbol];

Yes this works out great! Thanks! But why?

 

[caethyril]

Yes this works out great! Thanks! But why?

Yay!

I think it's because the default value is applied first, then it loads the value from the file. If that value isn't already in the saved options, config[symbol] will be undefined. Unfortunately undefined is falsy so the !! ("not-not") converts that to false, overriding the default true value.

In short: "skip this if this option wasn't found in the saved settings".