init

src/types/demo1.ts

@@ -0,0 +1,14 @@
+interface SquareConfig {
+    color?: string;
+    width?: number;
+}
+
+function createSquare(config: SquareConfig): { color: string; area: number } {
+    return {
+        color: config.color || 'red',
+        area: config.width ? config.width * config.width : 20
+    };
+}
+let config = { colour: 'red', width: 100 };
+
+let mySquare = createSquare(config);

src/types/global.d.ts

@@ -0,0 +1,36 @@
+declare type RecordAny = Record<string, any>;
+declare type RecordNever = Record<never, never>;
+declare type RecordAnyOrNever = RecordAny | RecordNever;
+
+/**
+ * 基础类型接口
+ */
+declare type BaseType = boolean | number | string | undefined | null;
+
+/**
+ * 环境变量类型转义函数接口
+ */
+declare type ParseType<T extends BaseType = string> = (value: string) => T;
+
+/**
+ * 一个类的类型
+ */
+declare type ClassType<T> = new (...args: any[]) => T;
+
+/**
+ * 嵌套对象全部可选
+ */
+declare type RePartial<T> = {
+    [P in keyof T]?: T[P] extends (infer U)[] | undefined
+    ? RePartial<U>[]
+    : T[P] extends object | undefined
+    ? T[P] extends ((...args: any[]) => any) | ClassType<T[P]> | undefined
+    ? T[P]
+    : RePartial<T[P]>
+    : T[P];
+}
+
+/**
+ * 防止swc下循环依赖报错
+ */
+declare type WrapperType<T> = T;