initial

wp-includes/js/codemirror/htmlhint-kses.js

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+/* global HTMLHint */
+/* eslint no-magic-numbers: ["error", { "ignore": [1] }] */
+HTMLHint.addRule( {
+	id: 'kses',
+	description: 'Element or attribute cannot be used.',
+
+	/**
+	 * Initialize.
+	 *
+	 * @this {import('htmlhint/types').Rule}
+	 * @param {import('htmlhint').HTMLParser} parser - Parser.
+	 * @param {import('htmlhint').Reporter} reporter - Reporter.
+	 * @param {Record<string, Record<string, boolean>>} options - KSES options.
+	 * @return {void}
+	 */
+	init: function ( parser, reporter, options ) {
+		'use strict';
+
+		parser.addListener( 'tagstart', ( event ) => {
+			const tagName = event.tagName.toLowerCase();
+			if ( ! options[ tagName ] ) {
+				reporter.error(
+					`Tag <${ event.tagName }> is not allowed.`,
+					event.line,
+					event.col,
+					this,
+					event.raw
+				);
+				return;
+			}
+
+			const allowedAttributes = options[ tagName ];
+			const column = event.col + event.tagName.length + 1;
+			for ( const attribute of event.attrs ) {
+				if ( ! allowedAttributes[ attribute.name.toLowerCase() ] ) {
+					reporter.error(
+						`Tag attribute [${ attribute.raw }] is not allowed.`,
+						event.line,
+						column + attribute.index,
+						this,
+						attribute.raw
+					);
+				}
+			}
+		} );
+	},
+} );