Rename syntax to double hyphen and data-wp-interactive

packages/interactivity/src/constants.js

@@ -1 +1 @@
-export const directivePrefix = 'data-wp-';
+export const directivePrefix = 'wp';

packages/interactivity/src/directives.js

@@ -64,7 +64,7 @@ export default () => {
 		);
 	} );
 
-	// data-wp-effect.[name]
+	// data-wp-effect--[name]
 	directive( 'effect', ( { directives: { effect }, context, evaluate } ) => {
 		const contextValue = useContext( context );
 		Object.values( effect ).forEach( ( path ) => {
@@ -74,7 +74,7 @@ export default () => {
 		} );
 	} );
 
-	// data-wp-init.[name]
+	// data-wp-init--[name]
 	directive( 'init', ( { directives: { init }, context, evaluate } ) => {
 		const contextValue = useContext( context );
 		Object.values( init ).forEach( ( path ) => {
@@ -84,7 +84,7 @@ export default () => {
 		} );
 	} );
 
-	// data-wp-on.[event]
+	// data-wp-on--[event]
 	directive( 'on', ( { directives: { on }, element, evaluate, context } ) => {
 		const contextValue = useContext( context );
 		Object.entries( on ).forEach( ( [ name, path ] ) => {
@@ -94,7 +94,7 @@ export default () => {
 		} );
 	} );
 
-	// data-wp-class.[classname]
+	// data-wp-class--[classname]
 	directive(
 		'class',
 		( {
@@ -139,7 +139,7 @@ export default () => {
 		}
 	);
 
-	// data-wp-bind.[attribute]
+	// data-wp-bind--[attribute]
 	directive(
 		'bind',
 		( { directives: { bind }, element, context, evaluate } ) => {
@@ -175,6 +175,24 @@ export default () => {
 		}
 	);
 
+	// data-wp-text
+	directive(
+		'text',
+		( {
+			directives: {
+				text: { default: text },
+			},
+			element,
+			evaluate,
+			context,
+		} ) => {
+			const contextValue = useContext( context );
+			element.props.children = evaluate( text, {
+				context: contextValue,
+			} );
+		}
+	);
+
 	// data-wp-ignore
 	directive(
 		'ignore',

packages/interactivity/src/hydration.js

@@ -11,7 +11,7 @@ import { directivePrefix } from './constants';
 
 export const init = async () => {
 	document
-		.querySelectorAll( `[${ directivePrefix }island]` )
+		.querySelectorAll( `[data-${ directivePrefix }-interactive]` )
 		.forEach( ( node ) => {
 			if ( ! hydratedIslands.has( node ) ) {
 				const fragment = createRootFragment( node.parentNode, node );

packages/interactivity/src/vdom.js

@@ -7,9 +7,23 @@ import { h } from 'preact';
  */
 import { directivePrefix as p } from './constants';
 
-const ignoreAttr = `${ p }ignore`;
-const islandAttr = `${ p }island`;
-const directiveParser = new RegExp( `${ p }([^.]+)\.?(.*)$` );
+const ignoreAttr = `data-${ p }-ignore`;
+const islandAttr = `data-${ p }-interactive`;
+const fullPrefix = `data-${ p }-`;
+
+// Regular expression for directive parsing.
+const directiveParser = new RegExp(
+	`^data-${ p }-` + // ${p} must be a prefix string, like 'wp'.
+		// Match alphanumeric characters including hyphen-separated
+		// segments. It excludes underscore intentionally to prevent confusion.
+		// E.g., "custom-directive".
+		'([a-z0-9]+(?:-[a-z0-9]+)*)' +
+		// (Optional) Match '--' followed by any alphanumeric charachters. It
+		// excludes underscore intentionally to prevent confusion, but it can
+		// contain multiple hyphens. E.g., "--custom-prefix--with-more-info".
+		'(?:--([a-z0-9][a-z0-9-]+))?$',
+	'i' // Case insensitive.
+);
 
 export const hydratedIslands = new WeakSet();
 
@@ -44,7 +58,10 @@ export function toVdom( root ) {
 
 		for ( let i = 0; i < attributes.length; i++ ) {
 			const n = attributes[ i ].name;
-			if ( n[ p.length ] && n.slice( 0, p.length ) === p ) {
+			if (
+				n[ fullPrefix.length ] &&
+				n.slice( 0, fullPrefix.length ) === fullPrefix
+			) {
 				if ( n === ignoreAttr ) {
 					ignore = true;
 				} else if ( n === islandAttr ) {