1 files changed, 76 insertions, 0 deletions
diff --git a/vanilla/node_modules/css-tree/cjs/syntax/node/common/feature.cjs b/vanilla/node_modules/css-tree/cjs/syntax/node/common/feature.cjs
new file mode 100644
index 0000000..fa5de4e
--- /dev/null
+++ b/vanilla/node_modules/css-tree/cjs/syntax/node/common/feature.cjs
@@ -0,0 +1,76 @@
+'use strict';
+
+const types = require('../../../tokenizer/types.cjs');
+
+const structure = {
+    name: String,
+    value: ['Identifier', 'Number', 'Dimension', 'Ratio', null]
+};
+
+function createParse(type) {
+    return function parse() {
+        const start = this.tokenStart;
+        let name;
+        let value = null;
+
+        this.eat(types.LeftParenthesis);
+        this.skipSC();
+
+        name = this.consume(types.Ident);
+        this.skipSC();
+
+        if (this.tokenType !== types.RightParenthesis) {
+            this.eat(types.Colon);
+            this.skipSC();
+
+            switch (this.tokenType) {
+                case types.Number:
+                    if (this.lookupNonWSType(1) === types.Delim) {
+                        value = this.Ratio();
+                    } else {
+                        value = this.Number();
+                    }
+
+                    break;
+
+                case types.Dimension:
+                    value = this.Dimension();
+                    break;
+
+                case types.Ident:
+                    value = this.Identifier();
+                    break;
+
+                default:
+                    this.error('Number, dimension, ratio or identifier is expected');
+            }
+
+            this.skipSC();
+        }
+
+        this.eat(types.RightParenthesis);
+
+        return {
+            type,
+            loc: this.getLocation(start, this.tokenStart),
+            name,
+            value
+        };
+    };
+}
+
+function generate(node) {
+    this.token(types.LeftParenthesis, '(');
+    this.token(types.Ident, node.name);
+
+    if (node.value !== null) {
+        this.token(types.Colon, ':');
+        this.node(node.value);
+    }
+
+    this.token(types.RightParenthesis, ')');
+}
+
+exports.createParse = createParse;
+exports.generate = generate;
+exports.structure = structure;