feat(projects): 登录页面开始迁移

src/typings/common/util.d.ts

@@ -0,0 +1,17 @@
+declare namespace Util {
+  /** convert a union to an intersection: X | Y | Z ==> X & Y & Z */
+  type UnionToIntersection<T> = (T extends any ? (args: T) => any : never) extends (args: infer R) => any ? R : never;
+
+  /** returns true if the type is a union otherwise false */
+  type IsUnion<T> = [T] extends [UnionToIntersection<T>] ? false : true;
+
+  type LastInUnion<T> = UnionToIntersection<T extends any ? (arg: T) => any : never> extends (arg: infer R) => any
+    ? R
+    : never;
+
+  type UnionToTuple<T, U = T> = [T] extends [never]
+    ? []
+    : [LastInUnion<T>, ...UnionToTuple<Exclude<U, LastInUnion<T>>>];
+
+  type Inter = UnionToTuple<'1' | '2'>;
+}