Since WordPress 5.4 the recommended method of adding metaboxes and setting meta values has changed. This page uses the newer method that employs useEntityProps. For details of the older method that uses the meta property of block attributes see here. General advice about WordPress metadata Meta keys can have dashes or underscored, however, names without… Continue reading Gutenberg meta boxes and sidebars using the use `useEntityProp` hook
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It is a far fare butter ting that I doe know.