Merge pull request #253 from Shopify/docs/update-theme-definment

Add textVariants to docs

Author: sebastianekstrom

documentation/docs/fundamentals/defining-your-theme.md

@@ -34,6 +34,19 @@ const theme = createTheme({
     l: 24,
     xl: 40,
   },
+  textVariants: {
+    header: {
+      fontWeight: 'bold',
+      fontSize: 34,
+    },
+    body: {
+      fontSize: 16,
+      lineHeight: 24,
+    },
+    defaults: {
+      // We can define a default text variant here.
+    },
+  },
 });
 
 export type Theme = typeof theme;