chore(): more ts strict fixes

packages/core/src/components/datetime/datetime.tsx

@@ -232,15 +232,18 @@ export class Datetime {
 
     // If the user has not passed in picker buttons,
     // add a cancel and ok button to the picker
-    if (pickerOptions.buttons.length === 0) {
-      pickerOptions.buttons = [{
-        text: this.cancelText,
-        role: 'cancel',
-        handler: () => this.ionCancel.emit(this)
-      }, {
-        text: this.doneText,
-        handler: (data: any) => this.value = data,
-      }];
+    const buttons = pickerOptions.buttons;
+    if (!buttons || buttons.length === 0) {
+      pickerOptions.buttons = [
+        {
+          text: this.cancelText,
+          role: 'cancel',
+          handler: () => this.ionCancel.emit(this)
+        },
+        {
+          text: this.doneText,
+          handler: (data: any) => this.value = data,
+        }];
     }
 
     pickerOptions.columns = this.generateColumns();

packages/core/src/components/fab-button/fab-button.tsx

@@ -52,10 +52,11 @@ export class FabButton {
   @Prop() disabled = false;
 
   componentDidLoad() {
-    const parentNode = this.el.parentNode.nodeName;
+    const parentNode = this.el.parentNode;
+    const parentTag = parentNode ? parentNode.nodeName : null;
 
-    this.inList = (parentNode === 'ION-FAB-LIST');
-    this.inContainer = (parentNode === 'ION-FAB');
+    this.inList = (parentTag === 'ION-FAB-LIST');
+    this.inContainer = (parentTag === 'ION-FAB');
   }
 
 

packages/core/src/components/gesture-controller/gesture-controller.ts

@@ -125,14 +125,17 @@ export class GestureController {
 
 
 export class GestureDelegate {
+  private ctrl: GestureController|null;
 
   constructor(
-    private ctrl: GestureController,
+    ctrl: GestureController,
     private gestureDelegateId: number,
     private name: string,
     private priority: number,
     private disableScroll: boolean
-  ) { }
+  ) {
+    this.ctrl = ctrl;
+  }
 
   canStart(): boolean {
     if (!this.ctrl) {
@@ -185,47 +188,51 @@ export class BlockerDelegate {
 
   blocked = false;
 
+  private ctrl: GestureController|null;
+
   constructor(
     private blockerDelegateId: number,
-    private controller: GestureController,
-    private disable: string[],
+    ctrl: GestureController,
+    private disable: string[] | undefined,
     private disableScroll: boolean
-  ) { }
+  ) {
+    this.ctrl = ctrl;
+  }
 
   block() {
-    if (!this.controller) {
+    if (!this.ctrl) {
       return;
     }
     if (this.disable) {
-      this.disable.forEach(gesture => {
-        this.controller.disableGesture(gesture, this.blockerDelegateId);
-      });
+      for (const gesture of this.disable) {
+        this.ctrl.disableGesture(gesture, this.blockerDelegateId);
+      }
     }
 
     if (this.disableScroll) {
-      this.controller.disableScroll(this.blockerDelegateId);
+      this.ctrl.disableScroll(this.blockerDelegateId);
     }
     this.blocked = true;
   }
 
   unblock() {
-    if (!this.controller) {
+    if (!this.ctrl) {
       return;
     }
     if (this.disable) {
-      this.disable.forEach(gesture => {
-        this.controller.enableGesture(gesture, this.blockerDelegateId);
-      });
+      for (const gesture of this.disable) {
+        this.ctrl.enableGesture(gesture, this.blockerDelegateId);
+      }
     }
     if (this.disableScroll) {
-      this.controller.enableScroll(this.blockerDelegateId);
+      this.ctrl.enableScroll(this.blockerDelegateId);
     }
     this.blocked = false;
   }
 
   destroy() {
     this.unblock();
-    this.controller = null;
+    this.ctrl = null;
   }
 }
 

packages/core/src/components/gesture/recognizers.ts

@@ -1,5 +1,4 @@
 
-
 export class PanRecognizer {
   private startX: number;
   private startY: number;

packages/core/src/components/infinite-scroll/infinite-scroll.tsx

@@ -104,7 +104,7 @@ export class InfiniteScroll {
     this.thresholdChanged(this.threshold);
     this.enableScrollEvents(!this.disabled);
     if (this.position === Position.Top) {
-      this.dom.write(() => this.scrollEl.scrollToBottom(0));
+      this.dom.write(() => this.scrollEl && this.scrollEl.scrollToBottom(0));
     }
   }
 
@@ -114,8 +114,9 @@ export class InfiniteScroll {
 
   @Listen('ionScroll', {enabled: false})
   protected onScroll(ev: CustomEvent) {
+    const scrollEl = this.scrollEl;
     const detail = ev.detail as ScrollDetail;
-    if (!this.canStart()) {
+    if (!scrollEl || !this.canStart()) {
       return 1;
     }
 
@@ -125,8 +126,8 @@ export class InfiniteScroll {
       return 2;
     }
     const scrollTop = detail.scrollTop;
-    const scrollHeight = this.scrollEl.scrollHeight;
-    const height = this.scrollEl.offsetHeight;
+    const scrollHeight = scrollEl.scrollHeight;
+    const height = scrollEl.offsetHeight;
     const threshold = this.thrPc ? (height * this.thrPc) : this.thrPx;
 
     const distanceFromInfinite = (this.position === Position.Bottom)
@@ -159,7 +160,8 @@ export class InfiniteScroll {
    */
   @Method()
   complete() {
-    if (!this.isLoading) {
+    const scrollEl = this.scrollEl;
+    if (!this.isLoading || !scrollEl) {
       return;
     }
     this.isLoading = false;
@@ -187,18 +189,18 @@ export class InfiniteScroll {
       this.isBusy = true;
       // ******** DOM READ ****************
       // Save the current content dimensions before the UI updates
-      const prev = this.scrollEl.scrollHeight - this.scrollEl.scrollTop;
+      const prev = scrollEl.scrollHeight - scrollEl.scrollTop;
 
       // ******** DOM READ ****************
       this.dom.read(() => {
         // UI has updated, save the new content dimensions
-        const scrollHeight = this.scrollEl.scrollHeight;
+        const scrollHeight = scrollEl.scrollHeight;
         // New content was added on top, so the scroll position should be changed immediately to prevent it from jumping around
         const newScrollTop = scrollHeight - prev;
 
         // ******** DOM WRITE ****************
         this.dom.write(() => {
-          this.scrollEl.scrollTop = newScrollTop;
+          scrollEl.scrollTop = newScrollTop;
           this.isBusy = false;
         });
       });
@@ -224,7 +226,9 @@ export class InfiniteScroll {
   }
 
   private enableScrollEvents(shouldListen: boolean) {
-    this.enableListener(this, 'ionScroll', shouldListen, this.scrollEl);
+    if (this.scrollEl) {
+      this.enableListener(this, 'ionScroll', shouldListen, this.scrollEl);
+    }
   }
 
   hostData() {

packages/core/src/components/input/input.tsx

@@ -204,7 +204,7 @@ export class Input implements InputComponent {
   @Watch('value')
   protected valueChanged() {
     const inputEl = this.el.querySelector('input');
-    if (inputEl.value !== this.value) {
+    if (inputEl && inputEl.value !== this.value) {
       inputEl.value = this.value;
     }
   }

packages/core/src/components/router-controller/router-utils.ts

@@ -11,7 +11,7 @@ export interface NavElement extends HTMLElement {
 export interface RouterEntry {
   path: string;
   id: any;
-  segments: string[];
+  segments?: string[];
   props?: any;
 }