From: Alexander Ebert <ebert@woltlab.com>
Date: Tue, 15 Jun 2021 09:36:59 +0000 (+0200)
Subject: Disable lazy loading for images in AMP
X-Git-Tag: 5.4.0_Beta_2~14
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=c1e3cf9be668bac5c953ae5ce71c94c90ea7183b;p=GitHub%2FWoltLab%2FWCF.git

Disable lazy loading for images in AMP

Fixes #4290
---

diff --git a/wcfsetup/install/files/lib/system/html/output/AmpHtmlOutputProcessor.class.php b/wcfsetup/install/files/lib/system/html/output/AmpHtmlOutputProcessor.class.php
index 645fb1c160..df4eb79bd4 100644
--- a/wcfsetup/install/files/lib/system/html/output/AmpHtmlOutputProcessor.class.php
+++ b/wcfsetup/install/files/lib/system/html/output/AmpHtmlOutputProcessor.class.php
@@ -91,6 +91,11 @@ class AmpHtmlOutputProcessor extends HtmlOutputProcessor
                 for ($i = 0, $length = $element->attributes->length; $i < $length; $i++) {
                     $attr = $element->attributes->item($i);
 
+                    // AMP does not support lazy loading of images.
+                    if ($tag === 'img' && $attr === 'loading') {
+                        continue;
+                    }
+
                     $newElement->setAttribute($attr->localName, $attr->nodeValue);
                 }