in with the new

src/core/plugins/allow-try-it-out-if-host.js

@@ -0,0 +1,36 @@
+import React, { PropTypes } from "react"
+
+export default function (system) {
+  return {
+    components: {
+      NoHostWarning,
+    },
+    statePlugins: {
+      spec: {
+        selectors: {
+          allowTryItOutFor,
+        }
+      }
+    }
+  }
+}
+
+// This is a quick style. How do we improve this?
+const style = {
+  backgroundColor: "#e7f0f7",
+  padding: "1rem",
+  borderRadius: "3px",
+}
+
+function NoHostWarning() {
+  return (
+    <div style={style}>Note: The interactive forms are disabled, as no `host` property was found in the specification.  Please see: <a href="https://github.com/OAI/OpenAPI-Specification/blob/master/versions/2.0.md#swagger-object" target="_blank">OAI 2.0/#swagger-object</a></div>
+  )
+}
+
+// Only allow if, there is a host field
+function allowTryItOutFor(state) {
+  return ({specSelectors}) => {
+    return specSelectors.hasHost(state)
+  }
+}