Fix #258 for real

cjs/interface/attr.js

@@ -1,7 +1,7 @@
 'use strict';
 const {ATTRIBUTE_NODE} = require('../shared/constants.js');
 const {CHANGED, VALUE} = require('../shared/symbols.js');
-const {String} = require('../shared/utils.js');
+const {String, ignoreCase} = require('../shared/utils.js');
 const {attrAsJSON} = require('../shared/jsdon.js');
 const {emptyAttributes} = require('../shared/attributes.js');
 
@@ -42,8 +42,8 @@ class Attr extends Node {
 
   toString() {
     const {name, [VALUE]: value} = this;
-    return emptyAttributes.has(name) && !value ?
-            name : `${name}="${value.replace(QUOTE, '"')}"`;
+    return emptyAttributes.has(name) && !value && ignoreCase(this) ?
+      name : `${name}="${value.replace(QUOTE, '"')}"`;
   }
 
   toJSON() {

esm/interface/attr.js

@@ -1,6 +1,6 @@
 import {ATTRIBUTE_NODE} from '../shared/constants.js';
 import {CHANGED, VALUE} from '../shared/symbols.js';
-import {String} from '../shared/utils.js';
+import {String, ignoreCase} from '../shared/utils.js';
 import {attrAsJSON} from '../shared/jsdon.js';
 import {emptyAttributes} from '../shared/attributes.js';
 
@@ -41,8 +41,8 @@ export class Attr extends Node {
 
   toString() {
     const {name, [VALUE]: value} = this;
-    return emptyAttributes.has(name) && !value ?
-            name : `${name}="${value.replace(QUOTE, '"')}"`;
+    return emptyAttributes.has(name) && !value && ignoreCase(this) ?
+      name : `${name}="${value.replace(QUOTE, '"')}"`;
   }
 
   toJSON() {

types/commonjs/perf_hooks.d.cts

@@ -1,5 +1 @@
-/// <reference types="node" />
-export const performance: import("perf_hooks").Performance | {
-    now(): number;
-};
-import { performance } from "perf_hooks";
+export const performance: any;

types/esm/shared/node.d.ts

@@ -6,7 +6,7 @@ export function parentElement({ parentNode }: {
     parentNode: any;
 }): any;
 export function previousSibling({ [PREV]: prev }: {
-    "__@PREV@24211": any;
+    "__@PREV@24061": any;
 }): any;
 export function nextSibling(node: any): any;
 import { PREV } from './symbols.js';

worker.js

@@ -4832,8 +4832,8 @@ let Attr$1 = class Attr extends Node$1 {
 
   toString() {
     const {name, [VALUE]: value} = this;
-    return emptyAttributes.has(name) && !value ?
-            name : `${name}="${value.replace(QUOTE, '"')}"`;
+    return emptyAttributes.has(name) && !value && ignoreCase(this) ?
+      name : `${name}="${value.replace(QUOTE, '"')}"`;
   }
 
   toJSON() {