diff --git a/.changeset/silent-rocks-relax.md b/.changeset/silent-rocks-relax.md
new file mode 100644
index 000000000..f32eb4f00
--- /dev/null
+++ b/.changeset/silent-rocks-relax.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Prevent dev from locking up on empty selectors
diff --git a/packages/astro/src/compiler/transform/postcss-scoped-styles/index.ts b/packages/astro/src/compiler/transform/postcss-scoped-styles/index.ts
index dd885ffb2..a10eba77a 100644
--- a/packages/astro/src/compiler/transform/postcss-scoped-styles/index.ts
+++ b/packages/astro/src/compiler/transform/postcss-scoped-styles/index.ts
@@ -96,10 +96,14 @@ export function scopeRule(selector: string, className: string) {
/** PostCSS Scope plugin */
export default function astroScopedStyles(options: AstroScopedOptions): Plugin {
+ const rulesScopedCache = new WeakSet();
return {
postcssPlugin: '@astrojs/postcss-scoped-styles',
Rule(rule) {
- rule.selector = scopeRule(rule.selector, options.className);
+ if(!rulesScopedCache.has(rule)) {
+ rule.selector = scopeRule(rule.selector, options.className);
+ rulesScopedCache.add(rule);
+ }
},
};
}
diff --git a/packages/astro/test/astro-basic.test.js b/packages/astro/test/astro-basic.test.js
index 29346f043..a93e5bac0 100644
--- a/packages/astro/test/astro-basic.test.js
+++ b/packages/astro/test/astro-basic.test.js
@@ -40,4 +40,11 @@ Basics('Correctly serializes boolean attributes', async ({ runtime }) => {
assert.equal($('h2').attr('not-data-ok'), '');
});
+Basics('Selector with an empty body', async ({ runtime }) => {
+ const result = await runtime.load('/empty-class');
+ const html = result.contents;
+ const $ = doc(html);
+ assert.equal($('.author').length, 1, 'author class added');
+});
+
Basics.run();
diff --git a/packages/astro/test/fixtures/astro-basic/src/pages/empty-class.astro b/packages/astro/test/fixtures/astro-basic/src/pages/empty-class.astro
new file mode 100644
index 000000000..1dc19c7a0
--- /dev/null
+++ b/packages/astro/test/fixtures/astro-basic/src/pages/empty-class.astro
@@ -0,0 +1,15 @@
+---
+
+---
+
+
+ Testing
+
+
+
+
+
+
\ No newline at end of file