File size: 2,607 Bytes
94786da | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | diff --git a/packages/next/src/build/webpack/loaders/lightningcss-loader/src/loader.ts b/packages/next/src/build/webpack/loaders/lightningcss-loader/src/loader.ts
index 00f8f53e4c..1a0b64a259 100644
--- a/packages/next/src/build/webpack/loaders/lightningcss-loader/src/loader.ts
+++ b/packages/next/src/build/webpack/loaders/lightningcss-loader/src/loader.ts
@@ -369,6 +369,14 @@ export async function LightningCssLoader(
: 0
const includeMask = (1 | userIncludeMask) & ~userExcludeMask // 1 = Features.Nesting
+ // `@custom-media` is draft syntax and behind a parser flag
+ // (`drafts.customMedia`).
+ //
+ // See: https://lightningcss.dev/transpilation.html#custom-media-queries
+ const customMediaMask = featureNamesToMask(['custom-media-queries'])
+ const drafts =
+ (includeMask & customMediaMask) !== 0 ? { customMedia: true } : undefined
+
try {
const {
code,
@@ -392,6 +400,7 @@ export async function LightningCssLoader(
this.sourceMap && prevMap ? JSON.stringify(prevMap) : undefined,
include: includeMask,
exclude: userExcludeMask,
+ drafts,
})
let cssCodeAsString = code.toString()
diff --git a/turbopack/crates/turbopack-css/src/process.rs b/turbopack/crates/turbopack-css/src/process.rs
index 90317ddd7f..8725a2c9d6 100644
--- a/turbopack/crates/turbopack-css/src/process.rs
+++ b/turbopack/crates/turbopack-css/src/process.rs
@@ -4,7 +4,9 @@ use anyhow::{Result, bail};
use async_trait::async_trait;
use lightningcss::{
css_modules::{CssModuleExport, Pattern, Segment},
- stylesheet::{MinifyOptions, ParserOptions, PrinterOptions, StyleSheet, ToCssResult},
+ stylesheet::{
+ MinifyOptions, ParserFlags, ParserOptions, PrinterOptions, StyleSheet, ToCssResult,
+ },
targets::{BrowserslistConfig, Features, Targets},
traits::ToCss,
values::url::Url,
@@ -450,7 +452,19 @@ async fn process_content(
}
}
+ // `@custom-media` is draft syntax and behind a parser flag.
+ //
+ // See: https://lightningcss.dev/transpilation.html#custom-media-queries
+ let mut flags = ParserFlags::empty();
+ let include_features = Features::from_bits_truncate(feature_flags.include)
+ & !Features::from_bits_truncate(feature_flags.exclude);
+ flags.set(
+ ParserFlags::CUSTOM_MEDIA,
+ include_features.contains(Features::CustomMediaQueries),
+ );
+
let config = ParserOptions {
+ flags,
css_modules: match ty {
CssModuleType::Module => Some(lightningcss::css_modules::Config {
pattern: Pattern {
|