Fix eslint issues for 5 files

src/Common/Splitter.ts

@@ -35,8 +35,11 @@ export class Splitter {
     this.initialize();
   }
 
-  public initialize() {
-    if (document.getElementById(this.splitterId) !== null && document.getElementById(this.leftSideId) != null) {
+  public initialize(): void {
+    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/NotebookComponentAdapter.tsx

@@ -16,7 +16,7 @@ export interface NotebookComponentAdapterOptions {
 
 export class NotebookComponentAdapter extends NotebookComponentBootstrapper implements ReactAdapter {
   private onUpdateKernelInfo: () => void;
-  public parameters: any;
+  public parameters: undefined;
 
   constructor(options: NotebookComponentAdapterOptions) {
     super({

src/Explorer/Notebook/NotebookComponent/VirtualCommandBarComponent.tsx

@@ -43,7 +43,9 @@ 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

@@ -1,5 +1,5 @@
-/* eslint jsx-a11y/no-static-element-interactions: 0 */
-/* eslint jsx-a11y/click-events-have-key-events: 0 */
+// /* 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";
@@ -23,7 +23,7 @@ interface DispatchProps {
 type Props = ComponentProps & DispatchProps & StateProps;
 
 export class HijackScroll extends React.Component<Props> {
-  el: HTMLDivElement | null = null;
+  el: HTMLDivElement | null = undefined;
 
   scrollIntoViewIfNeeded(prevFocused?: boolean): void {
     // Check if the element is being hovered over.
@@ -38,6 +38,7 @@ 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
@@ -46,7 +47,7 @@ export class HijackScroll extends React.Component<Props> {
     }
   }
 
-  componentDidUpdate(prevProps: Props) {
+  componentDidUpdate(prevProps: Props): void {
     this.scrollIntoViewIfNeeded(prevProps.focused);
   }
 
@@ -54,7 +55,7 @@ export class HijackScroll extends React.Component<Props> {
     this.scrollIntoViewIfNeeded();
   }
 
-  render() {
+  render(): JSX.Element {
     return (
       <div
         onClick={this.props.selectCell}