From 99ea6adfd4e4bc26d44c485ae7a6978203eab68d Mon Sep 17 00:00:00 2001
From: Alan Agius <alan.agius4@gmail.com>
Date: Mon, 8 Mar 2021 12:48:26 +0100
Subject: [PATCH] fix(@angular-devkit/build-angular): only remove nomodule and
 defer attributes empty values

Closes #20207

(cherry picked from commit 84f39778cc37c997d0b2b5295f766e08d4c94c78)
---
 .../build_angular/src/utils/index-file/inline-critical-css.ts   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/angular_devkit/build_angular/src/utils/index-file/inline-critical-css.ts b/packages/angular_devkit/build_angular/src/utils/index-file/inline-critical-css.ts
index bdaec99aee00..3b6d0d4ec53b 100644
--- a/packages/angular_devkit/build_angular/src/utils/index-file/inline-critical-css.ts
+++ b/packages/angular_devkit/build_angular/src/utils/index-file/inline-critical-css.ts
@@ -63,7 +63,7 @@ export class InlineCriticalCssProcessor {
       // Clean up value from value less attributes.
       // This is caused because parse5 always requires attributes to have a string value.
       // nomodule="" defer="" -> nomodule defer.
-      content: content.replace(/(\s[a-z]+)=""/g, '$1'),
+      content: content.replace(/(\s(?:defer|nomodule))=""/g, '$1'),
       errors: critters.errors,
       warnings: critters.warnings,
     };