From b7048fd213385f9d3e58a63aebf972868ee440b9 Mon Sep 17 00:00:00 2001
From: Lea Verou <lea@verou.me>
Date: Thu, 29 Oct 2020 14:47:25 +0200
Subject: [PATCH] Get registered variables (that are currently set)

Rel #1
---
 vars/registered.js | 35 +++++++++++++++++++++++++++++++++++
 vars/root.js       |  1 -
 2 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 vars/registered.js

diff --git a/vars/registered.js b/vars/registered.js
new file mode 100644
index 0000000..a677dca
--- /dev/null
+++ b/vars/registered.js
@@ -0,0 +1,35 @@
+export default function compute() {
+
+function walkElements(node, callback) {
+	if (Array.isArray(node)) {
+		for (let n of node) {
+			walkElements(n, callback);
+		}
+	}
+	else {
+		callback(node);
+
+		if (node.children) {
+			walkElements(node.children, callback);
+		}
+	}
+}
+
+let ret = new Set();
+
+walkElements(vars.computed, node => {
+	if (node.declarations) {
+		for (let property in node.declarations) {
+			let value;
+			let o = node.declarations[property];
+
+			if (property.startsWith("--") && o.type) {
+				ret.add(property);
+			}
+		}
+	}
+});
+
+return [...ret];
+
+}
diff --git a/vars/root.js b/vars/root.js
index 8b3676d..e053bf0 100644
--- a/vars/root.js
+++ b/vars/root.js
@@ -24,7 +24,6 @@ let ret = {
 walkElements(vars.computed, node => {
 	if (node.declarations) {
 		for (let property in node.declarations) {
-			let value;
 			let o = node.declarations[property];
 
 			if (property.startsWith("--")) {