src/asset-loaders/JSONAsset.js
import Asset from '../systems/AssetSystem/Asset';
/**
* JSON asset loader.
*/
export default class JSONAsset extends Asset {
/**
* Asset factory.
*
* @param {*} args - Factory parameters.
*
* @return {JSONAsset} Asset instance.
*
* @example
* system.registerProtocol('json', JSONAsset.factory);
*/
static factory(...args) {
return new JSONAsset(...args);
}
/**
* @override
*/
load() {
const { filename, owner } = this;
return owner.fetchEngine(owner.pathPrefix + filename, owner.fetchOptions)
.then(response => !!response.ok
? response.json()
: Promise.reject(new Error(`Cannot load JSON file: ${filename}`))
)
.then(data => {
this.data = data;
return this;
});
}
}