feat(css/parser): Add legacy_ie to the ParserConfig

.github/workflows/bench.yml

@@ -11,35 +11,6 @@ env:
   RUST_LOG: "off"
 
 jobs:
-  binary-size:
-    name: Binary size
-    if: >-
-      ${{ !contains(github.event.head_commit.message, 'chore: ') && github.repository_owner == 'swc-project' }}
-    runs-on: macos-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Cache
-        uses: actions/cache@v1
-        with:
-          path: |
-            ./cache
-            ~/.cargo/
-            target
-          key: cargo-release-${{ runner.os }}-${{ hashFiles('**/Cargo.lock') }}
-          restore-keys: |
-            cargo-release-${{ runner.os }}-${{ hashFiles('**/Cargo.lock') }}
-
-      - name: Install wasm-pack
-        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
-
-      - name: Build (release)
-        run: |
-          yarn
-          yarn build
-
-      - name: Print binary size
-        run: ls -al ./bindings/target/release/libbinding*
-
   benchmark:
     name: Performance regression check
     if: >-

crates/swc_css_parser/src/parser/mod.rs

@@ -47,6 +47,10 @@ pub struct ParserConfig {
     /// Defaults to `false`.
     #[serde(default)]
     pub legacy_nesting: bool,
+
+    /// If this is `true`, the legacy syntax for IE will be parsed.
+    #[serde(default)]
+    pub legacy_ie: bool,
 }
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]

crates/swc_css_parser/src/parser/values_and_units/mod.rs

@@ -1704,7 +1704,7 @@ where
                 let value = match self.try_parse(|p| p.parse_generic_value()) {
                     Some(v) => v,
                     None => {
-                        if is_one_of!(self, ";", ":") {
+                        if is_one_of!(self, ";", ":") || (self.config.legacy_ie && is!(self, "=")) {
                             let tok = self.input.bump().unwrap();
 
                             ComponentValue::PreservedToken(Box::new(tok))

crates/swc_css_parser/tests/fixture.rs

@@ -518,6 +518,7 @@ fn stylesheet_span_visualizer(input: PathBuf, config: Option<ParserConfig>) {
         let config = match config {
             Some(config) => config,
             _ => ParserConfig {
+                legacy_ie: true,
                 ..Default::default()
             },
         };
@@ -551,8 +552,20 @@ fn stylesheet_span_visualizer(input: PathBuf, config: Option<ParserConfig>) {
 
 #[testing::fixture("tests/fixture/**/input.css")]
 fn pass(input: PathBuf) {
-    stylesheet_test(input.clone(), Default::default());
-    stylesheet_test_tokens(input, Default::default());
+    stylesheet_test(
+        input.clone(),
+        ParserConfig {
+            legacy_ie: true,
+            ..Default::default()
+        },
+    );
+    stylesheet_test_tokens(
+        input,
+        ParserConfig {
+            legacy_ie: true,
+            ..Default::default()
+        },
+    );
 }
 
 #[testing::fixture("tests/line-comment/**/input.css")]

crates/swc_css_parser/tests/fixture/turbo/4092/input.css

@@ -0,0 +1,4 @@
+.carousel .control-dots .dot.selected, .carousel .control-dots .dot:hover {
+     opacity: 1;
+     filter: alpha(opacity=100);
+}