Add Custom Attribute To gutenberg block

[dthenley]

I primarily dev themes for my clients and bake most of the styling they would need into the site. I am trying to stay away from making a custom ACF block for everything when i could just as well add a certain class to achieve the same result. I am having some issue with trying to add custom attribute to core blocks. When theming what do you think is the best approach to take to add a custom attribute on a gutenberg block?

[Lovor01]

There is possibility to add custom classes in the block editor in advanced part of the inspector, and also, you can target specific block by its name, namely .wp-block-block-name, but if you really need to add class programmatically, you can look into Block filters. You would want to use blocks.getSaveContent.extraProps filter.