Enable TypeScript `noImplicitThis` (#761)

src/Explorer/Graph/GraphExplorerComponent/D3ForceGraph.ts

@@ -733,15 +733,16 @@ export class D3ForceGraph implements GraphRenderer {
       .attr("aria-label", (d: D3Node) => {
         return this.retrieveNodeCaption(d);
       })
-      .on("dblclick", function (_: MouseEvent, d: D3Node) {
+      .on("dblclick", function (this: Element, _: MouseEvent, d: D3Node) {
+        // https://stackoverflow.com/a/41945742 ('this' implicitly has type 'any' because it does not have a type annotation)
         // this is the <g> element
         self.onNodeClicked(this.parentNode, d);
       })
-      .on("click", function (_: MouseEvent, d: D3Node) {
+      .on("click", function (this: Element, _: MouseEvent, d: D3Node) {
         // this is the <g> element
         self.onNodeClicked(this.parentNode, d);
       })
-      .on("keypress", function (event: KeyboardEvent, d: D3Node) {
+      .on("keypress", function (this: Element, event: KeyboardEvent, d: D3Node) {
         if (event.charCode === Constants.KeyCodes.Space || event.charCode === Constants.KeyCodes.Enter) {
           event.stopPropagation();
           // this is the <g> element

tsconfig.json

@@ -3,6 +3,7 @@
     "allowJs": true,
     "sourceMap": false,
     "noImplicitAny": true,
+    "noImplicitThis": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "allowUnreachableCode": false,
@@ -14,13 +15,24 @@
     "target": "es2017",
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
-    "lib": ["es5", "es6", "dom"],
+    "lib": [
+      "es5",
+      "es6",
+      "dom"
+    ],
     "jsx": "react",
     "moduleResolution": "node",
     "resolveJsonModule": true,
     "noEmit": true,
-    "types": ["jest"]
+    "types": [
+      "jest"
+    ]
   },
-  "include": ["./src/**/*", "./utils/**/*"],
-  "exclude": ["./src/**/__mocks__/**/*"]
-}
+  "include": [
+    "./src/**/*",
+    "./utils/**/*"
+  ],
+  "exclude": [
+    "./src/**/__mocks__/**/*"
+  ]
+}