36 lines
976 B
JavaScript
36 lines
976 B
JavaScript
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class FetchHandler {
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static files = {};
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static async loadFiles(array, isJSON) {
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let content = [];
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for (let i = 0; i < array; i++) {
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content.push(await FetchHandler.loadFile(array[i], isJSON));
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}
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return content;
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}
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static async loadFile(filename, isJSON) {
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filename += '?v=' + version;
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let files = FetchHandler.files;
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if (files[filename]) {
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return files[filename];
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}
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let data = await FetchHandler.tryFromCache(filename);
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if (isJSON) {
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data = JSON.parse(data);
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}
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files[filename] = data;
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return data;
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}
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static async tryFromCache(filename) {
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if (caches) {
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let cache = await caches.open('vis3d-pwa-1');
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let data = await cache.match(filename);
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if (!data) {
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data = await fetch(filename);
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}
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return await data.text();
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}
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}
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}
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