initial commit. phase 1 complete

frontend/node_modules/jose/dist/browser/lib/is_disjoint.js

@@ -0,0 +1,22 @@
+const isDisjoint = (...headers) => {
+    const sources = headers.filter(Boolean);
+    if (sources.length === 0 || sources.length === 1) {
+        return true;
+    }
+    let acc;
+    for (const header of sources) {
+        const parameters = Object.keys(header);
+        if (!acc || acc.size === 0) {
+            acc = new Set(parameters);
+            continue;
+        }
+        for (const parameter of parameters) {
+            if (acc.has(parameter)) {
+                return false;
+            }
+            acc.add(parameter);
+        }
+    }
+    return true;
+};
+export default isDisjoint;