Add features up to import attributes

package.json

@@ -18,6 +18,8 @@
     "@babel/plugin-syntax-async-generators": "^7.8.4",
     "@babel/plugin-syntax-bigint": "^7.8.3",
     "@babel/plugin-syntax-class-properties": "^7.12.13",
+    "@babel/plugin-syntax-class-static-block": "^7.14.5",
+    "@babel/plugin-syntax-import-attributes": "^7.24.7",
     "@babel/plugin-syntax-import-meta": "^7.10.4",
     "@babel/plugin-syntax-json-strings": "^7.8.3",
     "@babel/plugin-syntax-logical-assignment-operators": "^7.10.4",
@@ -26,6 +28,7 @@
     "@babel/plugin-syntax-object-rest-spread": "^7.8.3",
     "@babel/plugin-syntax-optional-catch-binding": "^7.8.3",
     "@babel/plugin-syntax-optional-chaining": "^7.8.3",
+    "@babel/plugin-syntax-private-property-in-object": "^7.14.5",
     "@babel/plugin-syntax-top-level-await": "^7.14.5"
   },
   "peerDependencies": {
@@ -34,6 +37,8 @@
   "devDependencies": {
     "@babel/core": "7.25.2",
     "@babel/parser-7.0.0": "npm:@babel/[email protected]",
+    "@babel/parser-7.12.0": "npm:@babel/[email protected]",
+    "@babel/parser-7.22.0": "npm:@babel/[email protected]",
     "@babel/parser-7.9.0": "npm:@babel/[email protected]"
   },
   "license": "MIT"

src/index.js

@@ -8,19 +8,27 @@ const tests = {
   "json-strings": ["'\\u2028'"], // Babel 7.2.0
 
   // ECMAScript 2020
-  "bigint": ["1n"], // Babel 7.8.0
+  bigint: ["1n"], // Babel 7.8.0
   "optional-chaining": ["a?.b"], // Babel 7.9.0
   "nullish-coalescing-operator": ["a ?? b"], // Babel 7.9.0
   // import.meta is handled manually
 
-  // Stage 3
+  // ECMAScript 2021
   "numeric-separator": ["1_2"],
+  "logical-assignment-operators": ["a ||= b", "a &&= b", "a ??= c"],
+
+  // ECMAScript 2022
   "class-properties": [
     "(class { x = 1 })",
     "(class { #x = 1 })",
     "(class { #x() {} })",
   ],
-  "logical-assignment-operators": ["a ||= b", "a &&= b", "a ??= c"],
+  "private-property-in-object": ["(class { #x; m() { #x in y } })"],
+  "class-static-block": ["(class { static {} })"],
+  // top-level await is handled manually
+
+  // Stage 3
+  // import attributes is handled manually
 };
 
 const plugins = [];
@@ -53,5 +61,12 @@ if (major > 10 || (major === 10 && minor >= 4)) {
 if (major > 14 || (major === 14 && minor >= 3)) {
   plugins.push(require.resolve("@babel/plugin-syntax-top-level-await"));
 }
-
+// Similar for import attributes
+if (
+  major > 20 ||
+  (major === 20 && minor >= 10) ||
+  (major === 18 && minor >= 20)
+) {
+  plugins.push(require.resolve("@babel/plugin-syntax-import-attributes"));
+}
 module.exports = () => ({ plugins });

test/fixtures.json

@@ -1,15 +1,21 @@
 {
-  "#______name_______": [ "min node version", "code", "@babel/parser" ],
+  "#______name_______": ["min node version", "code", "@babel/parser"],
   "object rest/spread": [8.6, "({...x})"],
   "async generators": [10.0, "async function* f() {}"],
   "optional catch binding": [10.0, "try {} catch {}"],
   "JSON superset": [10.0, "'\\u2028'"],
   "bigint": [10.8, "10n"],
   "public class fields": [12.4, "class A { x = 1 }"],
   "private class fields": [12.4, "class A { #x = 1 }"],
+  "class blocks": [12.4, "class A { static {} }", "@babel/parser-7.12.0"],
   "numeric separators": [12.7, "1_2"],
   "optional chaining": [14.0, "a?.b"],
   "nullish coalescing": [14.0, "a ?? b"],
   "import.meta": [10.4, "import.meta"],
-  "top level await": [14.3, "await Promise.resolve()", "@babel/parser-7.9.0"]
+  "top level await": [14.3, "await Promise.resolve()", "@babel/parser-7.9.0"],
+  "import attributes": [
+    "18.20",
+    "import 'x' with { type: 'json' }",
+    "@babel/parser-7.22.0"
+  ]
 }

test/index.js

@@ -35,7 +35,7 @@ for (const [name, [version, code, parser]] of Object.entries(fixtures)) {
 
 function selectParser(version = "@babel/parser-7.0.0") {
   return () => ({
-    parserOverride: require(version).parse
+    parserOverride: require(version).parse,
   });
 }