Changing the category for existing Gutenberg blocks

Try this, it changes the core Spacer block from the Design to the Media category in the insertor: function myprefixFilterSpacerCategory(settings, name) { if (name === “core/spacer”) { // Object.assign can also be used instead of lodash.assign return lodash.assign({}, settings, { category: “media”, }); } return settings; } wp.hooks.addFilter( “blocks.registerBlockType”, “myprefix/filter-spacer-category”, myprefixFilterSpacerCategory );