fix: SEO javascript references (#35)

javascript/reference/variables/README.md

@@ -0,0 +1,29 @@
+---
+hide_title: true
+hide_table_of_contents: true
+title: Noodl.Variables
+---
+
+# Noodl.Variables
+
+Variables are the simplest form of global data model in Noodl. You can learn more about variables in the [guide](/docs/guides/data/variables). You can access all variables in your application trough the `Noodl.Variables` object. Changing a variable will trigger all connections to be updated for all **Variable** nodes in your project with the corresponding variable name.
+
+<div className="ndl-image-with-background xl">
+
+![](/javascript/reference/variables/variables.png)
+
+</div>
+
+```javascript
+// This will change the variable named MyVariable
+// and trigger all variable nodes in your project
+Noodl.Variables.MyVariable = "Hello";
+
+// Use this if you have spaces in your variable name
+Noodl.Variables["My Variable"] = 10;
+
+Noodl.Variables.userName = "Mickeeeey";
+
+// Reading variables
+console.log(Noodl.Variables.userName);
+```