init

user/plugins/admin/themes/grav/app/utils/formatbytes.js

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+const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+
+export default function formatBytes(bytes, decimals) {
+    if (bytes === 0) return '0 Byte';
+
+    let k = 1000;
+    let value = Math.floor(Math.log(bytes) / Math.log(k));
+    let decimal = decimals + 1 || 3;
+
+    return (bytes / Math.pow(k, value)).toPrecision(decimal) + ' ' + sizes[value];
+}