refactor(constants): introduce constants.js and wire timing/selector constants into framework transitions and navigation

public/scripts/constants.js

@@ -0,0 +1,27 @@
+(function(){
+	const TIMING = {
+		NAV_COOLDOWN_MS: 300,
+		VIEW_FADE_OUT_MS: 150,
+		VIEW_FADE_IN_MS: 200,
+		VIEW_FADE_DELAY_MS: 50,
+		AUTO_REFRESH_MS: 30000,
+		PRIMARY_NODE_REFRESH_MS: 10000,
+		LOAD_GUARD_MS: 10000
+	};
+
+	const SELECTORS = {
+		NAV_TAB: '.nav-tab',
+		VIEW_CONTENT: '.view-content',
+		CLUSTER_STATUS: '.cluster-status'
+	};
+
+	const CLASSES = {
+		CLUSTER_STATUS_ONLINE: 'cluster-status-online',
+		CLUSTER_STATUS_OFFLINE: 'cluster-status-offline',
+		CLUSTER_STATUS_CONNECTING: 'cluster-status-connecting',
+		CLUSTER_STATUS_ERROR: 'cluster-status-error',
+		CLUSTER_STATUS_DISCOVERING: 'cluster-status-discovering'
+	};
+
+	window.CONSTANTS = window.CONSTANTS || { TIMING, SELECTORS, CLASSES };
+})();