so://phie

blob: 7b3733b2a661b21d082737ba86f7009b6107e7a1 (991 bytes)[doc][blame][raw]

 1const cache = new Map();
 2
 3export default class Sprite {
 4	constructor(path) {
 5		this.path = path;
 6		this.image = new Image();
 7	}
 8	load() {
 9		return new Promise(async (resolve, reject) => {
10			this.image.onload = () => {
11				if(!cache.has(this.path)) {
12					cache.set(this.path, this.image.src);
13				}
14				resolve();
15			};
16			this.image.onerror = () => {
17				reject(new Error(`Unable to load sprite '${this.path}'!`));
18			}
19			if(cache.has(this.path)) {
20				this.image.src = cache.get(this.path);
21			}
22			else {
23				if(this.path.startsWith('data:')) {
24					this.image.src = this.path;
25				}
26				else {
27					try {
28						const response = await fetch(this.path);
29						if(response.status !== 200) {
30							reject(new Error(`Invalid response code ${response.status} for sprite '${this.path}'!`));
31						}
32						const blob = await response.blob();
33						const url = URL.createObjectURL(blob);
34						this.image.src = url;
35					}
36					catch(error) {
37						reject(error);
38					}
39				}
40			}
41		});
42	}
43}