Refactor and fix

src/helper/sum.ts

@@ -1,2 +1,3 @@
 export const sum = (list: ArrayLike<number>): number =>
+  // @ts-ignore
   Array.prototype.reduce.call(list, (a: number, sum: number) => a + sum, 0);

src/page/basics/image-anchor/image-anchor.scss

@@ -10,10 +10,12 @@
 
     svg {
       stroke: var(--normal-text-color);
+      transition: stroke var(--transition-time);
     }
   }
 
   p {
+    @include main-font();
     padding-bottom: var(--small-margin);
     font-size: 0.9rem;
     font-style: italic;

src/page/basics/image/image.ts

@@ -31,7 +31,7 @@ export class Image extends PageElement {
       image.images
         .slice(0, -1)
         .map(d => `(max-width: ${d.width / Image.imageScreenRatio}px) ${d.width}px,`)
-        .join('\n') + `\n${last(image.images).width}px`
+        .join('\n') + `\n${last(image.images)!.width}px`
     );
   }
 }

src/page/basics/preview/preview.scss

@@ -32,10 +32,15 @@
       }
     }
 
-    .loading,
-    .loading > svg {
+    .loading {
       @include square(var(--large-icon-size));
       @include absolute-center;
+      visibility: hidden;
+
+      & > svg {
+        @include square(var(--large-icon-size));
+        @include absolute-center;
+      }
     }
 
     iframe {
@@ -52,9 +57,6 @@
     .load-button {
       visibility: hidden;
     }
-  }
-
-  &.waiting {
     .loading {
       visibility: visible;
     }

src/page/basics/preview/preview.ts

@@ -3,7 +3,6 @@ import { createElement } from '../../../helper/create-element';
 import { generate } from './preview.html';
 import { Image } from '../image/image';
 import { ResponsiveImage } from '../../../types/responsive-image';
-import { OnLoadEvent } from '../../../events/concrete-events/on-load-event';
 
 export class Preview extends PageElement {
   public constructor(
@@ -18,14 +17,14 @@ export class Preview extends PageElement {
     this.query('.load-button').addEventListener('click', this.loadContent.bind(this));
   }
 
-  public handleOnLoadEvent(event: OnLoadEvent): OnLoadEvent {
+  public setParent(parent: PageElement) {
     new IntersectionObserver(e => {
       if (!e[0].isIntersecting) {
         this.unloadContent();
       }
-    }).observe(this.htmlRoot.parentElement);
+    }).observe(this.htmlRoot.parentElement!);
 
-    return event;
+    super.setParent(parent);
   }
 
   public loadContent() {

src/page/basics/text/text.html.ts

@@ -2,5 +2,5 @@ import './text.scss';
 import { html } from '../../../types/html';
 
 export const generate = (text: string): html => `
-  <p class="primitive-text">${text}</p>
+  <p class="text">${text}</p>
 `;

src/page/basics/text/text.scss

@@ -1,3 +1,6 @@
-.primitive-text {
+@use '../../../style/mixins' as *;
+
+.text {
+  @include main-font();
   text-align: left;
 }

src/page/basics/video/video.html.ts

@@ -9,16 +9,16 @@ export const generate = ({
   mp4,
   container,
 }: {
-  poster: url;
-  options: string;
+  poster?: url;
+  options?: string;
   webm: url;
   mp4: url;
-  container: boolean;
+  container?: boolean;
 }): html => `
-  ${container ? `<div class="figure-container">` : ''}
+  ${container === undefined || container ? `<div class="figure-container">` : ''}
     <video loading="lazy" ${options} ${poster ? `poster="${poster}` : ''}" >
         <source src="${webm}" type="video/webm"/>
         <source src="${mp4}" type="video/mp4"/>
     </video>
-  ${container ? `</div>` : ''}
+  ${container === undefined || container ? `</div>` : ''}
 `;

src/page/basics/video/video.ts

@@ -4,13 +4,13 @@ import { generate } from './video.html';
 import { url } from '../../../types/url';
 
 export class Video extends PageElement {
-  public constructor(
-    poster: url,
-    mp4: url,
-    webm: url,
-    options?: string,
-    container = true
-  ) {
-    super(createElement(generate({ poster, mp4, webm, options, container })));
+  public constructor(options: {
+    poster?: url;
+    mp4: url;
+    webm: url;
+    options?: string;
+    container?: boolean;
+  }) {
+    super(createElement(generate(options)));
   }
 }

src/page/footer/footer.html.ts

@@ -11,7 +11,7 @@ export const generate = ({
   lastEditText,
   lastEdit,
 }: Footer): html => `
-  <footer id="page-footer">
+  <footer id="footer">
     <h2>${title}</h2>
     <ul>
         ${curriculaVitae

src/page/footer/footer.scss

@@ -1,6 +1,6 @@
 @use '../../style/mixins' as *;
 
-footer#page-footer {
+#footer {
   text-align: center;
 
   margin-top: var(--large-margin);
@@ -30,7 +30,8 @@ footer#page-footer {
 
       img,
       svg {
-        @include max-square(var(--icon-size));
+        max-width: var(--icon-size);
+        max-height: var(--icon-size);
         margin-right: calc(var(--small-margin) / 2);
         stroke: var(--normal-text-color);
       }

src/page/header/header.scss

@@ -1,11 +1,17 @@
 @use '../../style/mixins' as *;
 
-section#about {
-  @include card-base();
+#about {
+  text-align: center;
+  box-shadow: var(--shadow);
   padding: var(--normal-margin);
   background-color: var(--accent-color);
   font-size: 0;
 
+  ::selection {
+    background-color: var(--very-light-text-color);
+    color: var(--accent-color);
+  }
+
   $img-size: 125px;
   h1,
   img,

src/page/image-viewer/image-viewer.html.ts

@@ -5,7 +5,7 @@ import { html } from '../../types/html';
 
 export const generate = (): html => `
   <section id="image-viewer">
-    <div id="container"></div>
+    <img image-viewer-ignore />
     <div tabindex="0" id="cancel">${cancel}</div>
   </section>
 `;

src/page/image-viewer/image-viewer.scss

@@ -1,20 +1,18 @@
 @use '../../style/mixins' as *;
 
-section#image-viewer {
+#image-viewer {
   @include center-children();
-  display: none;
+  @include blurred-background();
+
+  visibility: hidden;
   position: fixed;
   left: 0;
   top: 0;
   width: 100%;
   height: 100%;
-  margin: 0;
-  z-index: 2;
-  background-color: rgba(0, 0, 0, 0.85);
 
-  #container > * {
-    width: auto;
-    height: auto;
+  img {
+    @include square(auto);
 
     @include on-large-screen {
       max-width: 80vw;
@@ -22,17 +20,20 @@ section#image-viewer {
     }
 
     @include on-small-screen {
-      max-width: 95vw;
-      max-height: 95vh;
+      max-width: 92.5vw;
+      max-height: 92.5vh;
     }
   }
 
   #cancel {
+    @include image-button(var(--large-icon-size));
     @include square(calc(var(--large-icon-size) + var(--normal-margin) * 2));
     position: absolute;
     right: 0;
     top: 0;
 
-    @include image-button(var(--large-icon-size));
+    svg {
+      stroke: var(--normal-text-color);
+    }
   }
 }

src/page/image-viewer/image-viewer.ts

@@ -1,48 +1,36 @@
 import { PageElement } from '../page-element';
-
 import { generate } from './image-viewer.html';
 import { createElement } from '../../helper/create-element';
-import { OnLoadEvent } from '../../events/concrete-events/on-load-event';
-import { OptionalEvent } from '../../events/optional-event';
 
 export class PageImageViewer extends PageElement {
   public constructor() {
     super(createElement(generate()));
-    this.htmlRoot.onclick = () => PageImageViewer.hide(this.htmlRoot);
+
+    document.body.addEventListener('click', (event: MouseEvent) => {
+      if (
+        event.target instanceof HTMLImageElement &&
+        !event.target.attributes['image-viewer-ignore']
+      ) {
+        this.showImage(event.target);
+      }
+    });
+
+    document.body.addEventListener('keydown', (event: KeyboardEvent) => {
+      if (event.key === 'Escape') {
+        this.hideImage();
+      }
+    });
+
+    this.htmlRoot.addEventListener('click', this.hideImage.bind(this));
   }
 
-  public handleOnLoadEvent(event: OnLoadEvent): OptionalEvent {
-    document.body.addEventListener('keydown', this.handleKeydown.bind(this));
-
-    const media = Array.prototype.slice.call(document.querySelectorAll('img'));
-
-    media
-      .filter((e: HTMLElement) => !e.attributes['image-viewer-ignore'])
-      .forEach((e: HTMLImageElement) => (e.onclick = this.handleClick.bind(this)));
-
-    return super.handleOnLoadEvent(event);
+  private showImage(source: HTMLImageElement) {
+    const image = this.query('img') as HTMLImageElement;
+    image.src = source.src;
+    this.htmlRoot.style.visibility = 'visible';
   }
 
-  private handleClick(event: Event) {
-    const container = this.query('#container');
-    container.firstElementChild?.remove();
-
-    const element: HTMLImageElement = new Image();
-    element.src = (event.target as HTMLImageElement).src;
-    container.appendChild(element);
-    PageImageViewer.show(this.htmlRoot);
-  }
-
-  private handleKeydown(event: KeyboardEvent) {
-    if (event.key === 'Escape') {
-      PageImageViewer.hide(this.htmlRoot);
-    }
-  }
-
-  private static show(e: HTMLElement) {
-    e.style.display = 'flex';
-  }
-  private static hide(e: HTMLElement) {
-    e.style.display = 'none';
+  private hideImage() {
+    this.htmlRoot.style.visibility = 'hidden';
   }
 }

src/page/theme-switcher/theme-switcher.ts

@@ -7,9 +7,6 @@ import {
   turnOnLightMode,
 } from '../../style/dark-mode/dark-mode';
 import { turnOffAnimations, turnOnAnimations } from '../../style/animations/animations';
-import { OnLoadEvent } from '../../events/concrete-events/on-load-event';
-import { OptionalEvent } from '../../events/optional-event';
-import { OnPageThemeChangedEvent } from '../../events/concrete-events/on-page-theme-changed-event';
 
 export class PageThemeSwitcher extends PageElement {
   private static readonly localStorageKey = 'dark-mode';
@@ -28,12 +25,10 @@ export class PageThemeSwitcher extends PageElement {
     } else {
       turnOnLightMode();
     }
-    this.htmlRoot.onchange = this.handleThemeChange.bind(this);
-  }
 
-  public handleOnLoadEvent(event: OnLoadEvent): OptionalEvent {
+    this.htmlRoot.onchange = this.handleThemeChange.bind(this);
+
     this.handleThemeChange();
-    return super.handleOnLoadEvent(event);
   }
 
   private handleThemeChange() {
@@ -44,7 +39,6 @@ export class PageThemeSwitcher extends PageElement {
       turnOnLightMode();
     }
 
-    this.eventBroadcaster.broadcastEvent(new OnPageThemeChangedEvent(isDark));
     PageThemeSwitcher.saveToLocalStorage(isDark);
   }
 
@@ -57,7 +51,7 @@ export class PageThemeSwitcher extends PageElement {
 
   private static loadFromLocalStorage(): boolean | null {
     try {
-      return JSON.parse(localStorage?.getItem(PageThemeSwitcher.localStorageKey));
+      return JSON.parse(localStorage!.getItem(PageThemeSwitcher.localStorageKey)!);
     } catch {
       return null;
     }

src/page/timeline/timeline-element/timeline-element.scss

@@ -16,7 +16,7 @@
   }
 }
 
-section.timeline-element {
+.timeline-element {
   display: flex;
   width: var(--body-width);
   margin: auto;
@@ -85,14 +85,14 @@ section.timeline-element {
   }
 
   .card {
-    @include card-base();
+    text-align: center;
+    box-shadow: var(--shadow);
     border-radius: var(--border-radius);
 
     background-color: var(--blurred-card-color);
-    backdrop-filter: blur(var(--blur-radius));
-    @supports not (backdrop-filter: blur(var(--blur-radius))) {
-      background-color: var(--card-color);
-    }
+    transition: background-color var(--transition-time);
+
+    @include blurred-background();
 
     img,
     video,
@@ -131,12 +131,15 @@ section.timeline-element {
         display: flex;
         justify-content: center;
         border-top: $border-width solid var(--normal-text-color);
+        transition: border-color var(--transition-time);
+
         margin: 0;
         padding: 0;
         margin-top: var(--small-margin);
 
         .info-button {
           @include image-button(var(--icon-size));
+          @include main-font();
 
           .svgContainer {
             position: relative;
@@ -145,10 +148,12 @@ section.timeline-element {
 
             svg {
               stroke: var(--normal-text-color);
+              transition: stroke var(--transition-time);
             }
           }
 
           p {
+            @include main-font();
             padding-bottom: var(--small-margin);
             font-size: 0.9rem;
             font-style: italic;
@@ -162,6 +167,7 @@ section.timeline-element {
           padding-top: var(--small-margin);
           &:not(:last-child) {
             border-right: $border-width solid var(--normal-text-color);
+            transition: border-color var(--transition-time);
           }
         }
       }

src/page/timeline/timeline-element/timeline-element.ts

@@ -6,7 +6,7 @@ import { createElement } from '../../../helper/create-element';
 
 export class PageTimelineElement extends PageElement {
   private isOpen: boolean;
-  private more: HTMLElement;
+  private more?: HTMLElement;
   private showMore: string;
   private showLess: string;
 
@@ -22,7 +22,7 @@ export class PageTimelineElement extends PageElement {
       super(root);
       this.children = [content];
       this.isOpen = false;
-      this.more = root.querySelector('.more');
+      this.more = this.query('.more');
       this.more.appendChild(content.htmlRoot);
       addEventListener('resize', this.handleResize.bind(this));
 
@@ -35,6 +35,7 @@ export class PageTimelineElement extends PageElement {
 
     this.showMore = showMore;
     this.showLess = showLess;
+    this.isOpen = false;
   }
 
   private toggleOpen() {
@@ -50,17 +51,17 @@ export class PageTimelineElement extends PageElement {
   }
 
   private openMore() {
-    const deltaHeight = this.more.scrollHeight;
-    this.more.style.height = `${deltaHeight.toString()}px`;
+    const deltaHeight = this.more!.scrollHeight;
+    this.more!.style.height = `${deltaHeight.toString()}px`;
   }
 
   private closeMore() {
-    this.more.style.height = '0';
+    this.more!.style.height = '0';
   }
 
   private handleResize() {
     if (this.isOpen) {
-      this.more.style.height = 'auto';
+      this.more!.style.height = 'auto';
       this.openMore.bind(this);
     }
   }

src/page/timeline/timeline.scss

@@ -1,7 +1,7 @@
 @use '../../style/mixins' as *;
 
 @include on-large-screen {
-  div#timeline > :first-child {
+  #timeline > :first-child {
     margin-top: var(--large-margin);
   }
 }

src/style/animations/animations.ts

@@ -1,5 +1,5 @@
 export const turnOnAnimations = () =>
-  document.body.parentElement.setAttribute('animations', 'on');
+  document.documentElement.setAttribute('animations', 'on');
 
 export const turnOffAnimations = () =>
-  document.body.parentElement.setAttribute('animations', 'off');
+  document.documentElement.setAttribute('animations', 'off');

src/style/dark-mode/dark-mode.ts

@@ -2,7 +2,7 @@ export const isSystemLevelDarkModeEnabled = (): boolean =>
   matchMedia && matchMedia('(prefers-color-scheme: dark)').matches;
 
 export const turnOnDarkMode = () =>
-  document.body.parentElement.setAttribute('theme', 'dark');
+  document.documentElement.setAttribute('theme', 'dark');
 
 export const turnOnLightMode = () =>
-  document.body.parentElement.setAttribute('theme', 'light');
+  document.documentElement.setAttribute('theme', 'light');

src/style/mixins.scss

@@ -43,11 +43,11 @@ $breakpoint-width: 925px !default;
   transform: translateX(-50%) translateY(-50%);
 }
 
-@mixin card-base() {
-  text-align: center;
-  box-shadow: var(--shadow);
-  z-index: 1;
-  width: 100%;
+@mixin blurred-background() {
+  backdrop-filter: blur(var(--blur-radius));
+  @supports not (backdrop-filter: blur(var(--blur-radius))) {
+    background-color: var(--card-color);
+  }
 }
 
 @mixin square($size) {
@@ -55,16 +55,12 @@ $breakpoint-width: 925px !default;
   height: $size;
 }
 
-@mixin max-square($size) {
-  max-width: $size;
-  max-height: $size;
-}
-
 @mixin title-font() {
   font: 400 3rem 'Comfortaa', serif;
   font-style: normal;
   color: var(--normal-text-color);
   line-height: 1;
+  transition: color var(--transition-time);
 
   @include on-small-screen {
     font-size: 3rem;
@@ -76,18 +72,23 @@ $breakpoint-width: 925px !default;
   font: 400 1.75rem 'Comfortaa', serif;
   color: var(--normal-text-color);
   font-style: normal;
+  hyphens: auto;
+  transition: color var(--transition-time);
 }
 
 @mixin main-font() {
   font: 400 1.1rem 'Open Sans', sans-serif;
   color: var(--normal-text-color);
   line-height: 1.8;
+  hyphens: auto;
+  transition: color var(--transition-time);
 }
 
 @mixin special-text-font() {
   font: 400 1rem 'Open Sans', sans-serif;
   color: var(--special-text-color);
   font-style: italic;
+  transition: color var(--transition-time);
 }
 
 @mixin link {