This is a crash course in JavaScript. It is intended for people who already have a bit of programming experience in other languages.
This will hopefully give a basic idea of the most-commonly-used language features, but it is not indended to be a comprehensive guide.
This guide was last updated in August 2016.
To declare a variable called foo:
| <?php | |
| /* | |
| Since this script works by detecting changes to the page source code | |
| it works only on static pages. Sites that often change, eg. are generated | |
| by a CMS or embed changing script filenames will always trigger. | |
| There is no easy way around this limitation as far as I know. | |
| Instructions: | |
| - Add your Email and desired URLs |
| /* define some global values */ | |
| :root { | |
| color-scheme: light dark; /* this is required so iOS knows we support display modes at all */ | |
| --system-color-blue: rgba(0,122,255,1); | |
| --system-color-green: rgba(52,199,89,1); | |
| --system-color-indigo: rgba(88,86,214,1); | |
| --system-color-orange: rgba(255,149,0,1); | |
| --system-color-pink: rgba(255,45,85,1); | |
| --system-color-purple: rgba(175,82,222,1); |
| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8" /> | |
| <title>Map</title> | |
| <link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/v1.9.0/mapbox-gl.css" /> | |
| <style> | |
| #map-container { | |
| width: 100%; |
| const CHARACTER = class { | |
| constructor(name, attributes = {}) { | |
| this.name = name; | |
| this.attributes = {}; | |
| // merge custom with default values | |
| Object.assign(this.attributes, { | |
| 'strength': 3, | |
| 'constitution': 3, | |
| 'dexterity': 3, |
| window.addEventListener('DOMContentLoaded', function (event) { | |
| const CANVAS_WIDTH = 1200; | |
| const CANVAS_HEIGHT = 700; | |
| let canvasElement = document.createElement('canvas'); | |
| canvasElement.setAttribute('width', CANVAS_WIDTH+'px'); | |
| canvasElement.setAttribute('height', CANVAS_HEIGHT+'px'); | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Highscore Demo</title> | |
| </head> | |
| <body> | |
| <script type="module"> | |
| import highscore from './highscore.js' | |
| let points = new highscore('points', 14, 'desc'); /* keep up to 14 scores, under the storage name 'points', sorted in descending order */ |
Die Bitrate bestimmt die Qualität des Inhalts. Wird sie größer, steigen Qualität und Speicherbedarf an. Bilddimensionen, bzw. Länge des Musikstücks beeinflussen ebenfalls die Dateigröße: Höhere Auflösung bewirkt in der Regel größeren Platzbedarf.
| Kompression | Bild | Video | Audio |
|---|---|---|---|
| lossy | JPG, PNG-8, WEBP, HEIC | H.264, H.265, DivX, Xvid, 3GP, MJPEG | MP3, AAC, OGG |
| lossless | PNG-24 | DV-PAL, PNG | FLAC, APE, ALAC, AIFF, WAV |