[AssetMapper] Improve link generation script

Author: smnandre

ImportMap/ImportMapRenderer.php

@@ -78,7 +78,7 @@ public function render(string|array $entryPoint, array $attributes = []): string
                 // importmap entry is a noop
                 $importMap[$importName] = 'data:application/javascript,';
             } else {
-                $importMap[$importName] = 'data:application/javascript,'.rawurlencode(sprintf('const d=document,l=d.createElement("link");l.rel="stylesheet",l.href="%s",(d.head||d.getElementsByTagName("head")[0]).appendChild(l)', $path));
+                $importMap[$importName] = 'data:application/javascript,'.rawurlencode(sprintf('document.head.appendChild(Object.assign(document.createElement("link"),{rel:"stylesheet",href:"%s"}))', addslashes($path)));
             }
         }
 

Tests/ImportMap/ImportMapRendererTest.php

@@ -92,7 +92,7 @@ public function testBasicRender()
         $this->assertStringContainsString('"app_css_preload": "data:application/javascript,', $html);
         $this->assertStringContainsString('<link rel="stylesheet" href="/subdirectory/assets/styles/app-preload-d1g35t.css">', $html);
         // non-preloaded CSS file
-        $this->assertStringContainsString('"app_css_no_preload": "data:application/javascript,const%20d%3Ddocument%2Cl%3Dd.createElement%28%22link%22%29%3Bl.rel%3D%22stylesheet%22%2Cl.href%3D%22%2Fsubdirectory%2Fassets%2Fstyles%2Fapp-nopreload-d1g35t.css%22%2C%28d.head%7C%7Cd.getElementsByTagName%28%22head%22%29%5B0%5D%29.appendChild%28l%29', $html);
+        $this->assertStringContainsString('"app_css_no_preload": "data:application/javascript,document.head.appendChild%28Object.assign%28document.createElement%28%22link%22%29%2C%7Brel%3A%22stylesheet%22%2Chref%3A%22%2Fsubdirectory%2Fassets%2Fstyles%2Fapp-nopreload-d1g35t.css%22%7D', $html);
         $this->assertStringNotContainsString('<link rel="stylesheet" href="/subdirectory/assets/styles/app-nopreload-d1g35t.css">', $html);
         // remote js
         $this->assertStringContainsString('"remote_js": "https://cdn.example.com/assets/remote-d1g35t.js"', $html);