@wordpress/interactivity/build-module/vdom.mjs.map

Package that provides a standard and simple way to handle the frontend interactivity of Gutenberg blocks.

{
  "version": 3,
  "sources": ["../src/vdom.ts"],
  "sourcesContent": ["/**\n * External dependencies\n */\nimport { h, type ComponentChild, type JSX } from 'preact';\n/**\n * Internal dependencies\n */\nimport { warn } from './utils';\nimport { type DirectiveEntry } from './hooks';\n\nconst directivePrefix = `data-wp-`;\nconst namespaces: Array< string | null > = [];\nconst currentNamespace = () => namespaces[ namespaces.length - 1 ] ?? null;\nconst isObject = ( item: unknown ): item is Record< string, unknown > =>\n\tBoolean( item && typeof item === 'object' && item.constructor === Object );\nconst invalidCharsRegex = /[^a-z0-9-_]/i;\n\nfunction parseDirectiveName( directiveName: string ): {\n\tprefix: string;\n\tsuffix: string | null;\n\tuniqueId: string | null;\n} | null {\n\tconst name = directiveName.substring( 8 );\n\n\t// If the name contains invalid characters, it's not a valid directive name.\n\tif ( invalidCharsRegex.test( name ) ) {\n\t\treturn null;\n\t}\n\n\t// Finds the first \"--\" to separate the prefix.\n\tconst suffixIndex = name.indexOf( '--' );\n\n\t// If \"--\" is not found, everything is part of the prefix.\n\tif ( suffixIndex === -1 ) {\n\t\treturn { prefix: name, suffix: null, uniqueId: null };\n\t}\n\n\t// The prefix is the part before the first \"--\".\n\tconst prefix = name.substring( 0, suffixIndex );\n\t// The remaining is the part that starts from \"--\".\n\tconst remaining = name.substring( suffixIndex );\n\n\t// If the suffix starts with \"---\" (but not \"----\"), there is no suffix and\n\t// the remaining is the unique ID.\n\tif ( remaining.startsWith( '---' ) && remaining[ 3 ] !== '-' ) {\n\t\treturn {\n\t\t\tprefix,\n\t\t\tsuffix: null,\n\t\t\tuniqueId: remaining.substring( 3 ) || null,\n\t\t};\n\t}\n\n\t// Otherwise, the remaining is a potential suffix. The first two dashes are\n\t// removed.\n\tlet suffix: string | null = remaining.substring( 2 );\n\t// Search for \"---\" for a unique ID within the suffix.\n\tconst uniqueIdIndex = suffix.indexOf( '---' );\n\n\t// If \"---\" is found, split the suffix and the unique ID.\n\tif (\n\t\tuniqueIdIndex !== -1 &&\n\t\tsuffix.substring( uniqueIdIndex )[ 3 ] !== '-'\n\t) {\n\t\tconst uniqueId = suffix.substring( uniqueIdIndex + 3 ) || null;\n\t\tsuffix = suffix.substring( 0, uniqueIdIndex ) || null;\n\t\treturn { prefix, suffix, uniqueId };\n\t}\n\n\t// Otherwise, the rest is the entire suffix.\n\treturn { prefix, suffix: suffix || null, uniqueId: null };\n}\n\n// Regular expression for reference parsing. It can contain a namespace before\n// the reference, separated by `::`, like `some-namespace::state.somePath`.\n// Namespaces can contain any alphanumeric characters, hyphens, underscores or\n// forward slashes. References don't have any restrictions.\nconst nsPathRegExp = /^([\\w_\\/-]+)::(.+)$/;\n\nexport const hydratedIslands = new WeakSet();\n\n/**\n * Recursive function that transforms a DOM tree into vDOM.\n *\n * @param root The root element or node to start traversing on.\n * @return The resulting vDOM tree.\n */\nexport function toVdom( root: Node ): ComponentChild {\n\tconst nodesToRemove = new Set< Node >();\n\tconst nodesToReplace = new Set< Node >();\n\n\tconst treeWalker = document.createTreeWalker(\n\t\troot,\n\t\t205 // TEXT + CDATA_SECTION + COMMENT + PROCESSING_INSTRUCTION + ELEMENT\n\t);\n\n\tfunction walk( node: Node ): ComponentChild | null {\n\t\tconst { nodeType } = node;\n\n\t\t// TEXT_NODE (3)\n\t\tif ( nodeType === 3 ) {\n\t\t\treturn ( node as Text ).data;\n\t\t}\n\n\t\t// CDATA_SECTION_NODE (4)\n\t\tif ( nodeType === 4 ) {\n\t\t\tnodesToReplace.add( node );\n\t\t\treturn node.nodeValue;\n\t\t}\n\n\t\t// COMMENT_NODE (8) || PROCESSING_INSTRUCTION_NODE (7)\n\t\tif ( nodeType === 8 || nodeType === 7 ) {\n\t\t\tnodesToRemove.add( node );\n\t\t\treturn null;\n\t\t}\n\n\t\tconst elementNode = node as HTMLElement;\n\t\tconst { attributes } = elementNode;\n\t\tconst localName = elementNode.localName as keyof JSX.IntrinsicElements;\n\n\t\tconst props: Record< string, any > = {};\n\t\tconst children: Array< ComponentChild > = [];\n\t\tconst directives: Array<\n\t\t\t[ name: string, namespace: string | null, value: unknown ]\n\t\t> = [];\n\t\tlet ignore = false;\n\t\tlet island = false;\n\n\t\tfor ( let i = 0; i < attributes.length; i++ ) {\n\t\t\tconst attributeName = attributes[ i ].name;\n\t\t\tconst attributeValue = attributes[ i ].value;\n\t\t\tif (\n\t\t\t\tattributeName[ directivePrefix.length ] &&\n\t\t\t\tattributeName.slice( 0, directivePrefix.length ) ===\n\t\t\t\t\tdirectivePrefix\n\t\t\t) {\n\t\t\t\tif ( attributeName === 'data-wp-ignore' ) {\n\t\t\t\t\tignore = true;\n\t\t\t\t} else {\n\t\t\t\t\tconst regexResult = nsPathRegExp.exec( attributeValue );\n\t\t\t\t\tconst namespace = regexResult?.[ 1 ] ?? null;\n\t\t\t\t\tlet value: any = regexResult?.[ 2 ] ?? attributeValue;\n\t\t\t\t\ttry {\n\t\t\t\t\t\tconst parsedValue = JSON.parse( value );\n\t\t\t\t\t\tvalue = isObject( parsedValue ) ? parsedValue : value;\n\t\t\t\t\t} catch {}\n\t\t\t\t\tif ( attributeName === 'data-wp-interactive' ) {\n\t\t\t\t\t\tisland = true;\n\t\t\t\t\t\tconst islandNamespace =\n\t\t\t\t\t\t\t// eslint-disable-next-line no-nested-ternary\n\t\t\t\t\t\t\ttypeof value === 'string'\n\t\t\t\t\t\t\t\t? value\n\t\t\t\t\t\t\t\t: typeof value?.namespace === 'string'\n\t\t\t\t\t\t\t\t? value.namespace\n\t\t\t\t\t\t\t\t: null;\n\t\t\t\t\t\tnamespaces.push( islandNamespace );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tdirectives.push( [ attributeName, namespace, value ] );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else if ( attributeName === 'ref' ) {\n\t\t\t\tcontinue;\n\t\t\t}\n\t\t\t// For boolean attributes with empty string values, use `true`.\n\t\t\t// This prevents Preact from coercing \"\" to false. Camelcase\n\t\t\t// mismatches (readonly\u2192readOnly) are `undefined`, not `true`,\n\t\t\t// falling through to Preact's setAttribute path, which handles them\n\t\t\t// correctly: https://github.com/preactjs/preact/blob/bf7a195ac4b1706468e876e41b27428e3d8a08f3/src/diff/props.js#L114\n\t\t\tif (\n\t\t\t\tattributeValue === '' &&\n\t\t\t\telementNode[ attributeName ] === true\n\t\t\t) {\n\t\t\t\tprops[ attributeName ] = true;\n\t\t\t} else {\n\t\t\t\tprops[ attributeName ] = attributeValue;\n\t\t\t}\n\t\t}\n\n\t\tif ( ignore && ! island ) {\n\t\t\treturn [\n\t\t\t\th< any, any >( localName, {\n\t\t\t\t\t...props,\n\t\t\t\t\tinnerHTML: elementNode.innerHTML,\n\t\t\t\t\t__directives: { ignore: true },\n\t\t\t\t} ),\n\t\t\t];\n\t\t}\n\t\tif ( island ) {\n\t\t\thydratedIslands.add( elementNode );\n\t\t}\n\n\t\tif ( directives.length ) {\n\t\t\tprops.__directives = directives.reduce<\n\t\t\t\tRecord< string, Array< DirectiveEntry > >\n\t\t\t>( ( obj, [ name, ns, value ] ) => {\n\t\t\t\tconst directiveParsed = parseDirectiveName( name );\n\t\t\t\tif ( directiveParsed === null ) {\n\t\t\t\t\tif ( globalThis.SCRIPT_DEBUG ) {\n\t\t\t\t\t\twarn( `Found malformed directive name: ${ name }.` );\n\t\t\t\t\t}\n\t\t\t\t\treturn obj;\n\t\t\t\t}\n\t\t\t\tconst { prefix, suffix, uniqueId } = directiveParsed;\n\n\t\t\t\tobj[ prefix ] = obj[ prefix ] || [];\n\t\t\t\tobj[ prefix ].push( {\n\t\t\t\t\tnamespace: ns ?? currentNamespace()!,\n\t\t\t\t\tvalue: value as DirectiveEntry[ 'value' ],\n\t\t\t\t\tsuffix,\n\t\t\t\t\tuniqueId,\n\t\t\t\t} );\n\t\t\t\treturn obj;\n\t\t\t}, {} );\n\n\t\t\t// Sort directive arrays to ensure stable ordering across browsers.\n\t\t\t// Put nulls first, then sort by suffix and finally by uniqueIds.\n\t\t\tfor ( const prefix in props.__directives ) {\n\t\t\t\tprops.__directives[ prefix ].sort(\n\t\t\t\t\t( a: DirectiveEntry, b: DirectiveEntry ) => {\n\t\t\t\t\t\tconst aSuffix = a.suffix ?? '';\n\t\t\t\t\t\tconst bSuffix = b.suffix ?? '';\n\t\t\t\t\t\tif ( aSuffix !== bSuffix ) {\n\t\t\t\t\t\t\treturn aSuffix < bSuffix ? -1 : 1;\n\t\t\t\t\t\t}\n\t\t\t\t\t\tconst aId = a.uniqueId ?? '';\n\t\t\t\t\t\tconst bId = b.uniqueId ?? '';\n\t\t\t\t\t\treturn +( aId > bId ) - +( aId < bId );\n\t\t\t\t\t}\n\t\t\t\t);\n\t\t\t}\n\t\t}\n\n\t\tif ( props.__directives?.[ 'each-child' ] ) {\n\t\t\tprops.dangerouslySetInnerHTML = {\n\t\t\t\t__html: elementNode.innerHTML,\n\t\t\t};\n\t\t} else if ( localName === 'template' ) {\n\t\t\tprops.content = [\n\t\t\t\t...( elementNode as HTMLTemplateElement ).content.childNodes,\n\t\t\t].map( ( childNode ) => toVdom( childNode ) );\n\t\t} else {\n\t\t\tlet child = treeWalker.firstChild();\n\t\t\tif ( child ) {\n\t\t\t\twhile ( child ) {\n\t\t\t\t\tconst vnode = walk( child );\n\t\t\t\t\tif ( vnode ) {\n\t\t\t\t\t\tchildren.push( vnode );\n\t\t\t\t\t}\n\t\t\t\t\tchild = treeWalker.nextSibling();\n\t\t\t\t}\n\t\t\t\ttreeWalker.parentNode();\n\t\t\t}\n\t\t}\n\n\t\t// Restore previous namespace.\n\t\tif ( island ) {\n\t\t\tnamespaces.pop();\n\t\t}\n\n\t\treturn h( localName, props, children );\n\t}\n\n\tconst vdom = walk( treeWalker.currentNode );\n\n\tnodesToRemove.forEach( ( node: Node ) =>\n\t\t( node as Comment | ProcessingInstruction ).remove()\n\t);\n\tnodesToReplace.forEach( ( node: Node ) =>\n\t\t( node as CDATASection ).replaceWith(\n\t\t\tnew window.Text( ( node as CDATASection ).nodeValue ?? 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