Is it possible to remove Core/Blocks supports?

[alexis-magina]

Hello,
I'm searching a way to disable some features of core blocks ;
For example, I wanted to remove the width settings, the border radius, and the background color of the core/button block.
Is it possible ?

I searched and tried by using theme.json, php and js filters but with no success for now.

[t-hamano]

Hi.

If your theme has theme.json, you can opt-out by setting the following. This is a sample that disables the button background color and border radius controls.

{
	"$schema": "https://schemas.wp.org/trunk/theme.json",
	"version": 2,
	"settings": {
		"appearanceTools": true,
		"layout": {
			"contentSize": "840px",
			"wideSize": "1100px"
		},
		"blocks": {
			"core/button": {
				"color": {
					"background": false,
					"customGradient": false,
					"gradients": []
				},
				"border": {
					"radius": false
				}
			}
		}
	}
}

However, you cannot opt out of settings that are unique to that block, such as the width setting of the button block.

[tomdevisser]

You can use block variations to disable or override block attributes, and use @t-hamano 's solution for the styling options.