Fix editor asset URLs

CHANGELOG.md

@@ -24,6 +24,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Editor losing focus when project changes (#959)
 - Fix preview link (#912)
 - Web component code attribute (#963)
+- Fix substring match on CSS images (#910)
 - Error message wrapping (#968)
 - Fix scrollbars not showing (#816)
 - Width of empty `p5` canvas (#969)

src/components/Editor/Runners/HtmlRunner/HtmlRunner.jsx

@@ -114,9 +114,11 @@ function HtmlRunner() {
     var updatedProjectFile = { ...projectFile };
     if (projectFile.extension === "css") {
       projectImages.forEach((image) => {
+        const find = new RegExp(`['"]${image.filename}['"]`, "g"); // prevent substring matches
+        const replace = `"${image.url}"`;
         updatedProjectFile.content = updatedProjectFile.content.replaceAll(
-          image.filename,
-          image.url,
+          find,
+          replace,
         );
       });
     }