disabled hover effects on mobile

src/app/app.html

@@ -1,5 +1,5 @@
 <app-dot-background></app-dot-background>
-<div>
+<div [class.mobile]="isMobile()" [class.desktop]="isDesktop()">
   <header>
 
   </header>

src/app/app.ts

@@ -1,6 +1,7 @@
-import { Component, signal } from '@angular/core';
-import { RouterOutlet } from '@angular/router';
+import {Component, computed, HostListener, OnInit, signal} from '@angular/core';
+import {RouterOutlet} from '@angular/router';
 import {DotBackground} from './components/dot-background/dot-background';
+import {DeviceDetectionService} from './service/device-detection-service';
 
 @Component({
   selector: 'app-root',
@@ -8,6 +9,20 @@ import {DotBackground} from './components/dot-background/dot-background';
   templateUrl: './app.html',
   styleUrl: './app.scss'
 })
-export class App {
+export class App implements OnInit {
   protected readonly title = signal('Portfolio');
+  protected readonly isMobile = signal(false);
+  protected readonly isDesktop = computed(() => !this.isMobile());
+
+  constructor(private deviceDetectionService: DeviceDetectionService) {
+  }
+
+  ngOnInit(): void {
+    this.isMobile.set(this.deviceDetectionService.mobileCheck());
+  }
+
+  @HostListener('window:resize')
+  onResize() {
+    this.isMobile.set(this.deviceDetectionService.mobileCheck());
+  }
 }

src/app/components/dot-background/dot-background.ts

@@ -1,5 +1,6 @@
 import {afterNextRender, Component, ElementRef, NgZone, OnDestroy, ViewChild} from '@angular/core';
 import {Dot} from '../../models/dot';
+import {DeviceDetectionService} from '../../service/device-detection-service';
 
 @Component({
   selector: 'app-dot-background',
@@ -16,15 +17,16 @@ export class DotBackground implements OnDestroy {
   private animationId = 0;
   private initialized = false;
 
-  private readonly DOT_COUNT = 12;
+  private readonly INIT_DOT_COUNT = 12;
+  private readonly MAX_DOT_COUNT = 100;
+  private readonly MAX_DOT_COUNT_MOBILE = 40;
   private readonly COLORS = ['#6366f1', '#8b5cf6', '#a855f7', '#3b82f6'];
   private readonly MOUSE_RADIUS = 150;
 
-  private lastWidth = 0;
-  private lastHeight = 0;
-  private readonly RESIZE_THRESHOLD = 100; // ignore small height changes (browser chrome)
+  private ballSpawnId = 0;
+  private ballSpawnNextColor = 0;
 
-  constructor(private ngZone: NgZone) {
+  constructor(private ngZone: NgZone, private mobileService: DeviceDetectionService) {
     afterNextRender(() => {
       this.init();
     });
@@ -46,6 +48,7 @@ export class DotBackground implements OnDestroy {
 
     window.addEventListener('resize', this.resize);
     window.addEventListener('mousemove', this.onMouseMove);
+    window.addEventListener('click', this.onMouseClick);
 
     this.initialized = true;
     this.ngZone.runOutsideAngular(() => this.animate());
@@ -56,18 +59,11 @@ export class DotBackground implements OnDestroy {
     const width = window.innerWidth;
     const height = window.innerHeight;
 
-    const widthChanged = width !== this.lastWidth;
-    const heightDiff = Math.abs(height - this.lastHeight);
-    const significantHeightChange = heightDiff > this.RESIZE_THRESHOLD;
-
-    // Only resize on width change or significant height change (orientation flip, not browser chrome)
-    if (!widthChanged && !significantHeightChange && this.lastWidth !== 0) {
-      return;
-    }
-
-    this.lastWidth = width;
-    this.lastHeight = height;
+    const dx = Math.abs(width - canvas.width) / width;
+    const dy = Math.abs(height - canvas.height) / height;
 
+    if (!this.mobileService.mobileCheck() || dy > 0.2 || dx > 0.05) {
+      //sync canvas size to screen size
       canvas.width = width;
       canvas.height = height;
 
@@ -75,24 +71,62 @@ export class DotBackground implements OnDestroy {
         dot.x = Math.max(dot.radius, Math.min(width - dot.radius, dot.x));
         dot.y = Math.max(dot.radius, Math.min(height - dot.radius, dot.y));
       }
+    }
   };
 
+
+
   private onMouseMove = (e: MouseEvent) => {
-    this.mouse.x = e.clientX;
-    this.mouse.y = e.clientY;
+    const canvas = this.canvasRef.nativeElement;
+    // map real res to canvas res
+    this.mouse.x = e.clientX / window.innerWidth * canvas.width;
+    this.mouse.y = e.clientY / window.innerHeight * canvas.height;
   };
 
+  private onMouseClick = () => {
+    const dot = this.spawnDot();
+    dot.x = this.mouse.x;
+    dot.y = this.mouse.y;
+  };
+
+  private spawnDot(): Dot {
+    const dotId = this.ballSpawnId++;
+    const max_count = this.mobileService.mobileCheck() ? this.MAX_DOT_COUNT_MOBILE : this.MAX_DOT_COUNT;
+    let dot;
+    if (dotId < max_count) {
+      dot = {
+        x: 0,
+        y: 0,
+        vx: 0,
+        vy: 0,
+        radius: 1,
+        color: "#000000",
+      };
+
+      this.dots.push(dot);
+    } else {
+      dot = this.dots[dotId % this.dots.length];
+    }
+
+    this.populateDot(dot);
+
+    return dot;
+  }
+
+  private populateDot(dot: Dot) {
+    const {width, height} = this.canvasRef.nativeElement;
+
+    dot.x = Math.random() * width;
+    dot.y = Math.random() * height;
+    dot.vx = (Math.random() - 0.5) * 0.5;
+    dot.vy = (Math.random() - 0.5) * 0.5;
+    dot.radius = Math.random() * 60 + 40;
+    dot.color = this.COLORS[this.ballSpawnNextColor++ % this.COLORS.length];
+  }
+
   private initDots() {
-    const { width, height } = this.canvasRef.nativeElement;
-    for (let i = 0; i < this.DOT_COUNT; i++) {
-      this.dots.push({
-        x: Math.random() * width,
-        y: Math.random() * height,
-        vx: (Math.random() - 0.5) * 0.5,
-        vy: (Math.random() - 0.5) * 0.5,
-        radius: Math.random() * 60 + 40,
-        color: this.COLORS[i % this.COLORS.length],
-      });
+    for (let i = 0; i < this.INIT_DOT_COUNT; i++) {
+      this.spawnDot();
     }
   }
 
@@ -106,7 +140,7 @@ export class DotBackground implements OnDestroy {
       const dy = dot.y - this.mouse.y;
       const dist = Math.sqrt(dx * dx + dy * dy);
 
-      if (dist < this.MOUSE_RADIUS) {
+      if (dist != 0 && dist < this.MOUSE_RADIUS) {
         const force = (this.MOUSE_RADIUS - dist) / this.MOUSE_RADIUS;
         dot.vx += (dx / dist) * force * 0.5;
         dot.vy += (dy / dist) * force * 0.5;

src/app/components/pages/skills/skill-card/skill-card.scss

@@ -18,10 +18,9 @@
     inset 0 1px 0 rgba(255, 255, 255, 0.1);
   transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
 
-  &:hover {
+  :host-context(.desktop) &:hover {
     transform: translateY(-4px);
-    box-shadow:
-      0 8px 32px rgba(99, 102, 241, 0.2),
+    box-shadow: 0 8px 32px rgba(99, 102, 241, 0.2),
     inset 0 1px 0 rgba(255, 255, 255, 0.15);
     border-color: rgba(255, 255, 255, 0.25);
   }
@@ -54,7 +53,7 @@
         transition: filter 0.2s ease, transform 0.2s ease;
       }
 
-      &:hover img {
+      :host-context(.desktop) &:hover img {
         filter: none;
         transform: scale(1.1);
       }

src/app/service/device-detection-service.spec.ts

@@ -0,0 +1,16 @@
+import { TestBed } from '@angular/core/testing';
+
+import { DeviceDetectionService } from './device-detection-service';
+
+describe('DeviceDetectionService', () => {
+  let service: DeviceDetectionService;
+
+  beforeEach(() => {
+    TestBed.configureTestingModule({});
+    service = TestBed.inject(DeviceDetectionService);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+});

src/app/service/device-detection-service.ts

@@ -0,0 +1,15 @@
+import { Injectable } from '@angular/core';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class DeviceDetectionService {
+  public mobileCheck() {
+    let check = false;
+    (function (a) {
+      if (/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino/i.test(a) || /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-/i.test(a.substr(0, 4)))
+        check = true
+    })(navigator.userAgent || navigator.vendor || (window as any).opera);
+    return check;
+  };
+}