util: add fetch error handling
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@ -48,6 +48,9 @@ export class Listenable<T extends any[]> {
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export async function getJSON(url: string): Promise<any> {
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const res = await window.fetch(url);
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if (res.status < 200 || res.status >= 300)
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throw new Error(res.statusText);
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return await res.json();
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}
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