enable full validation as in light2 ui and fe2

src/arc.directive.ts

@@ -44,7 +44,7 @@ export class ArcDirective implements OnInit, OnDestroy, IArcDirective {
   public arcFocus = new EventEmitter<Element>();
 
   @Input('arc-default-focus')
-  public set arcDefaultFocus(ignored: any) {
+  public set arcDefaultFocus(_ignored: any) {
     this.arcSetFocus = this.arcSetFocus.startWith(undefined);
   }
 

src/focus.service.ts

@@ -193,13 +193,14 @@ function calculateScore(
  * Returns the common ancestor in the DOM of two nodes. From:
  * http://stackoverflow.com/a/7648545
  */
-function getCommonAncestor(a: Element, b: Element) {
+function getCommonAncestor(a: Element, b: Element): Element {
   const mask = 0x10;
   while (a = a.parentElement) {
     if ((a.compareDocumentPosition(b) & mask) === mask) { // tslint:disable-line
       return a;
     }
   }
+  return undefined;
 }
 
 /**

tsconfig.json

@@ -6,6 +6,10 @@
         "emitDecoratorMetadata": true,
         "moduleResolution": "node",
         "noImplicitAny": true,
+        "noImplicitReturns": true,
+        "noFallthroughCasesInSwitch": true,
+        "noUnusedLocals": true,
+        "noUnusedParameters": true,
         "strictNullChecks": false,
         "module": "commonjs",
         "sourceMap": true,

tslint.json

@@ -23,6 +23,7 @@
       "static-method-regex": "^[a-z][\\w\\d]+$",
       "function-regex": "^[a-z][\\w\\d]+$"
     }],
+    "variable-name": [true, "ban-keywords", "check-format", "allow-leading-underscore"],
 
     // Angular
     "directive-selector-name": [