Fix ESLint for few files

.eslintignore

@@ -18,9 +18,7 @@ src/Common/MessageHandler.test.ts
 src/Common/MessageHandler.ts
 src/Common/MongoProxyClient.test.ts
 src/Common/MongoUtility.ts
-src/Common/NotificationsClientBase.ts
 src/Common/QueriesClient.ts
-src/Common/Splitter.ts
 src/Controls/Heatmap/Heatmap.test.ts
 src/Controls/Heatmap/Heatmap.ts
 src/Definitions/datatables.d.ts
@@ -34,11 +32,7 @@ src/Definitions/jquery.d.ts
 src/Definitions/plotly.js-cartesian-dist.d-min.ts
 src/Definitions/png.d.ts
 src/Definitions/svg.d.ts
-src/Explorer/ComponentRegisterer.test.ts
-src/Explorer/ComponentRegisterer.ts
 src/Explorer/Controls/DiffEditor/DiffEditorComponent.ts
-
-src/Explorer/Controls/Editor/EditorComponent.ts
 src/Explorer/Controls/JsonEditor/JsonEditorComponent.ts
 src/Explorer/DataSamples/ContainerSampleGenerator.test.ts
 src/Explorer/DataSamples/ContainerSampleGenerator.ts
@@ -152,14 +146,11 @@ src/Explorer/Graph/GraphExplorerComponent/NodePropertiesComponent.tsx
 src/Explorer/Graph/GraphExplorerComponent/ReadOnlyNodePropertiesComponent.test.tsx
 src/Explorer/Graph/GraphExplorerComponent/ReadOnlyNodePropertiesComponent.tsx
 src/Explorer/Menus/CommandBar/CommandBarUtil.tsx
-# src/Explorer/Notebook/NotebookComponent/NotebookComponentAdapter.tsx
 src/Explorer/Notebook/NotebookComponent/NotebookComponentBootstrapper.tsx
-src/Explorer/Notebook/NotebookComponent/VirtualCommandBarComponent.tsx
 src/Explorer/Notebook/NotebookComponent/contents/index.tsx
 src/Explorer/Notebook/NotebookRenderer/NotebookReadOnlyRenderer.tsx
 src/Explorer/Notebook/NotebookRenderer/NotebookRenderer.tsx
 src/Explorer/Notebook/NotebookRenderer/decorators/draggable/index.tsx
-src/Explorer/Notebook/NotebookRenderer/decorators/hijack-scroll/index.tsx
 src/Explorer/Notebook/NotebookRenderer/decorators/kbd-shortcuts/index.tsx
 src/Explorer/Notebook/temp/inputs/connected-editors/codemirror.tsx
 src/Explorer/Tree/ResourceTreeAdapter.tsx

src/Common/Splitter.ts

@@ -35,8 +35,11 @@ export class Splitter {
     this.initialize();
   }
 
-  public initialize() {
+  public initialize(): void {
-    if (document.getElementById(this.splitterId) !== null && document.getElementById(this.leftSideId) != null) {
+    if (
+      document.getElementById(this.splitterId) !== undefined &&
+      document.getElementById(this.leftSideId) !== undefined
+    ) {
       this.splitter = <HTMLElement>document.getElementById(this.splitterId);
       this.leftSide = <HTMLElement>document.getElementById(this.leftSideId);
     }

src/Explorer/Controls/Editor/EditorComponent.ts

@@ -5,6 +5,7 @@ import template from "./editor-component.html";
 /**
  * Helper class for ko component registration
  */
+//eslint-disable-next-line
 export class EditorComponent {
   constructor() {
     return {
@@ -38,7 +39,7 @@ class EditorViewModel extends JsonEditorViewModel {
      * setTimeout is needed as creating the edtior manipulates the dom directly and expects
      * Knockout to have completed all of the initial bindings for the component
      */
-    this.params.content() != null &&
+    this.params.content() !== undefined &&
       setTimeout(() => {
         this.createEditor(this.params.content(), this.configureEditor.bind(this));
       });

src/Explorer/Notebook/NotebookComponent/VirtualCommandBarComponent.tsx

@@ -46,7 +46,9 @@ const makeMapStateToProps = (
   const { contentRef } = initialProps;
   const mapStateToProps = (state: AppState) => {
     const content = selectors.content(state, { contentRef });
-    let kernelStatus, kernelSpecName, currentCellType;
+    let kernelStatus,
+      kernelSpecName,
+      currentCellType = "";
 
     if (!content || content.type !== "notebook") {
       return {

src/Explorer/Notebook/NotebookRenderer/decorators/hijack-scroll/index.tsx

@@ -1,6 +1,3 @@
-/* eslint jsx-a11y/no-static-element-interactions: 0 */
-/* eslint jsx-a11y/click-events-have-key-events: 0 */
-
 import { actions, AppState, ContentRef, selectors } from "@nteract/core";
 import React from "react";
 import { connect } from "react-redux";
@@ -23,7 +20,7 @@ interface DispatchProps {
 type Props = ComponentProps & DispatchProps & StateProps;
 
 export class HijackScroll extends React.Component<Props> {
-  el: HTMLDivElement | null = null;
+  el: HTMLDivElement | null | undefined = undefined;
 
   scrollIntoViewIfNeeded(prevFocused?: boolean): void {
     // Check if the element is being hovered over.
@@ -38,6 +35,7 @@ export class HijackScroll extends React.Component<Props> {
     ) {
       if (this.el && "scrollIntoViewIfNeeded" in this.el) {
         // This is only valid in Chrome, WebKit
+        //eslint-disable-next-line
         (this.el as any).scrollIntoViewIfNeeded();
       } else if (this.el) {
         // Make a best guess effort for older platforms