feat(project): init

libs/util.ts

@@ -0,0 +1,13 @@
+/**
+ * @description: 判断值是否为某个类型
+ */
+export function is(val: unknown, type: string) {
+  return toString.call(val) === `[object ${type}]`
+}
+
+/**
+ * @description:  是否为数值
+ */
+export function isNumber(val: unknown): val is number {
+  return is(val, "Number")
+}