carpentry/client/js/libraries/AsyncDataReader.js

export class AsyncDataReader {
    async readText(filePath) {
		let response = await fetch(filePath);
		return response.text();
	}

    async readJson(filePath) {
		let response = await fetch(filePath);
		return response.json();
	}

    async readDOM(filePath) {
		let text = await this.readText(filePath);
		return new DOMParser().parseFromString(text, "text/html").body.firstChild;
	}

	async readXML(filePath) {
		let xml = await this.readText(filePath);
		return new DOMParser().parseFromString(xml, "application/xml");
	}
}