Pass DH helpSidebar options object to HelpSidebar constructor

lib/DataHarmonizer.js

@@ -59,6 +59,10 @@ class DataHarmonizer {
     this.loadingScreenRoot = options.loadingScreenRoot || this.root;
     this.modalsRoot = options.modalsRoot || document.querySelector('body');
     this.field_settings = options.fieldSettings || {};
+    this.helpSidebarOptions = Object.assign(
+      { enabled: true },
+      options.helpSidebar || {}
+    );
     this.columnHelpEntries = options.columnHelpEntries || [
       'column',
       'description',
@@ -69,13 +73,18 @@ class DataHarmonizer {
     this.self = this;
 
     // Use help sidebar by default unless turned off by client
-    if (
-      options.includeHelpSidebar === undefined ||
-      options.includeHelpSidebar
-    ) {
-      this.helpSidebar = new HelpSidebar(this.root, {
-        onToggle: () => this.hot.render(),
-      });
+    if (this.helpSidebarOptions.enabled) {
+      const opts = Object.assign({}, this.helpSidebarOptions);
+      opts.onToggle = (open) => {
+        // always do a HOT rerender on toggle in addition to anything client-specified
+        if (this.hot) {
+          this.hot.render();
+        }
+        if (typeof this.helpSidebarOptions.onToggle === 'function') {
+          this.helpSidebarOptions.onToggle(open);
+        }
+      };
+      this.helpSidebar = new HelpSidebar(this.root, opts);
     }
 
     this.injectLoadingScreen();