From 76cb9c2a39d477a64824a985ade40507e3bbade1 Mon Sep 17 00:00:00 2001
From: Adam Mathes <adam@adammathes.com>
Date: Fri, 13 Feb 2026 21:34:48 -0800
Subject: feat(vanilla): add testing infrastructure and tests (NK-wjnczv)

---
 .../css-tree/cjs/syntax/node/SupportsFeature.cjs   | 69 ++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 vanilla/node_modules/css-tree/cjs/syntax/node/SupportsFeature.cjs

(limited to 'vanilla/node_modules/css-tree/cjs/syntax/node/SupportsFeature.cjs')

diff --git a/vanilla/node_modules/css-tree/cjs/syntax/node/SupportsFeature.cjs b/vanilla/node_modules/css-tree/cjs/syntax/node/SupportsFeature.cjs
new file mode 100644
index 0000000..e569a5c
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/syntax/node/SupportsFeature.cjs
@@ -0,0 +1,69 @@
+'use strict';
+
+const types = require('../../tokenizer/types.cjs');
+
+const name = 'SupportsDeclaration';
+const structure = {
+    feature: String,
+    value: 'Declaration'
+};
+
+function parse() {
+    const start = this.tokenStart;
+    let featureName = 'declaration';
+    let valueParser = this.Declaration;
+
+    if (this.tokenType === types.Function) {
+        featureName = this.consumeFunctionName();
+        valueParser = this.supportsFeature[featureName.toLowerCase()];
+        if (!valueParser) {
+            this.error(`Unknown supports feature ${featureName.toLowerCase()}()`);
+        }
+    } else {
+        this.eat(types.LeftParenthesis);
+    }
+
+    this.skipSC();
+
+    const value = this.parseWithFallback(
+        () => {
+            const startValueToken = this.tokenIndex;
+            const value = valueParser.call(this);
+
+            if (this.eof === false &&
+                this.isBalanceEdge(startValueToken) === false) {
+                this.error();
+            }
+
+            return value;
+        },
+        (startToken) => this.Raw(startToken, null, false)
+    );
+
+    if (!this.eof) {
+        this.eat(types.RightParenthesis);
+    }
+
+    return {
+        type: 'SupportsDeclaration',
+        loc: this.getLocation(start, this.tokenStart),
+        feature: featureName,
+        value
+    };
+}
+
+function generate(node) {
+    if (node.feature !== 'declaration') {
+        this.token(types.Function, node.feature + '(');
+    } else {
+        this.token(types.LeftParenthesis, '(');
+    }
+
+    this.node(node.value);
+    this.token(types.RightParenthesis, ')');
+}
+
+exports.generate = generate;
+exports.name = name;
+exports.parse = parse;
+exports.structure = structure;
-- 
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