feat: ts re learn

docs/ts/geek/1.js

@@ -0,0 +1,9 @@
+function getData(id) {
+    return {
+        id: id,
+        name: 'jth',
+        age: 20
+    };
+}
+var a = 1;
+console.log(getData(a));

docs/ts/geek/1.ts

@@ -0,0 +1,18 @@
+
+interface Person {
+  id: number
+  name: string
+  age: number
+}
+
+function getData(id: number): Person {
+  return {
+    id: id,
+    name: 'jth',
+    age: 20
+  }
+}
+
+let a: number = 1
+
+console.log(getData(a))

docs/ts/geek/2.js

@@ -0,0 +1,7 @@
+var a1 = Symbol();
+var a2 = 1;
+var a3 = '1';
+var a4 = true;
+var a5 = undefined;
+var a6 = null;
+var a7 = {};

docs/ts/geek/2.ts

@@ -0,0 +1,48 @@
+let a1: symbol = Symbol()
+let a2: number = 1
+let a3: string = '1'
+let a4: boolean = true
+let a5: undefined = undefined
+let a6: null = null
+let a7: object = {}
+
+// 子类可以赋值父类
+class StringEx extends String {
+  constructor(...args: any[]) {
+    super(...args)
+  }
+}
+// 包装器对象 new String new Object, 不能直接赋值给 JS 类型
+let a8: String = new String('1')
+
+a8 = new StringEx('2')
+
+a8 = '3' // JS 类型可以赋值到包装器对象, 直至root对象
+
+
+
+interface Point {
+  x: number
+  y: number
+}
+
+interface Point3D extends Point {
+  z: number
+}
+
+type point2d = {
+  x: number
+  y: number
+}
+type point3d = point2d & {
+  z: number
+}
+
+interface point3D {
+  radius: number
+}
+
+// 不被允许
+type point3d = {
+  radius: number
+} & Point

docs/ts/geek/README.md

@@ -0,0 +1,65 @@
+## L1
+
+1. TS 主要作用
+- 代码上显式标注类型, 让代码更加易读
+- 开发和编译时, 通过类型推断和静态类型检查可以显著提高代码质量
+  - 发现潜在的编码风险, 提前暴露风险
+
+2. TS 主要用法
+- 编译制定文件 (tsc xx.ts)
+- 使用 tsc 初始化 ts 工程
+
+## L2
+
+1. JS 的类型和 TS 的类型 
+
+JS 类型分为
+- 引用类型: function object
+- 值类型: symbol number boolean string
+- 初始值: undefined null
+
+>  JS类型可以直接在 TS 中引用定义
+子类可以赋值给父类
+包装器对象 new String new Object, 不能直接赋值给 JS 类型
+
+---
+类型传递
+
+字面类型 => 原始类型 => 包装类型 => 祖先类 -> 空接口/空对象 Empty {}
+
+                      任意子类 => 父类p
+
+'abc'  => string => String =>  Object => Empty
+
+
+2. TS 类型
+
+- 基本类型
+- Arrays
+- any
+- functions
+  - 参数
+  - 返回值
+
+- Object Types
+  - Optional Properties
+- Union Types
+- 类型别名
+- 接口
+  - 所有的接口都可以实现类型别名
+  - > 类型别名和接口之间的区别
+类型别名和接口非常相似，在大多数情况下你可以在它们之间自由选择。 几乎所有的 interface 功能都可以在 type 中使用，关键区别在于不能重新开放类型以添加新的属性，而接口始终是可扩展的
+  - > 类型别名是不能添加新字段的
+- Type Assertions
+  - as
+  - <HTMLCanvasElement>
+- iteral types (字面类型)
+
+
+
+
+
+
+
+                       
+

docs/ts/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "ts",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "@types/node": "^22.7.5"
+  }
+}

docs/ts/tsconfig.json

@@ -0,0 +1,74 @@
+{
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig.json to read more about this file */
+
+    /* Basic Options */
+    // "incremental": true,                         /* Enable incremental compilation */
+    "target": "es2020",                             /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', 'ES2021', or 'ESNEXT'. */
+    "module": "es2020",                             /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
+    // "lib": [],                                   /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                             /* Allow javascript files to be compiled. */
+    // "checkJs": true,                             /* Report errors in .js files. */
+    // "jsx": "preserve",                           /* Specify JSX code generation: 'preserve', 'react-native', 'react', 'react-jsx' or 'react-jsxdev'. */
+    // "declaration": true,                         /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                      /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                           /* Generates corresponding '.map' file. */
+    // "outFile": "./",                             /* Concatenate and emit output to single file. */
+    // "outDir": "./",                              /* Redirect output structure to the directory. */
+    // "rootDir": "./",                             /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                           /* Enable project compilation */
+    // "tsBuildInfoFile": "./",                     /* Specify file to store incremental compilation information */
+    // "removeComments": true,                      /* Do not emit comments to output. */
+    // "noEmit": true,                              /* Do not emit outputs. */
+    // "importHelpers": true,                       /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,                  /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    // "isolatedModules": true,                     /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                                 /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                       /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,                    /* Enable strict null checks. */
+    // "strictFunctionTypes": true,                 /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,                 /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,        /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                      /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                        /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                      /* Report errors on unused locals. */
+    // "noUnusedParameters": true,                  /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,                   /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,          /* Report errors for fallthrough cases in switch statement. */
+    // "noUncheckedIndexedAccess": true,            /* Include 'undefined' in index signature results */
+    // "noImplicitOverride": true,                  /* Ensure overriding members in derived classes are marked with an 'override' modifier. */
+    // "noPropertyAccessFromIndexSignature": true,  /* Require undeclared properties from index signatures to use element accesses. */
+
+    /* Module Resolution Options */
+    // "moduleResolution": "node",                  /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                             /* Base directory to resolve non-absolute module names. */
+    // "paths": {},                                 /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                              /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                             /* List of folders to include type definitions from. */
+    // "types": [],                                 /* Type declaration files to be included in compilation. */
+    // "allowSyntheticDefaultImports": true,        /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true,                        /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,                    /* Do not resolve the real path of symlinks. */
+    // "allowUmdGlobalAccess": true,                /* Allow accessing UMD globals from modules. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                            /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                               /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,                     /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                       /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,              /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,               /* Enables experimental support for emitting type metadata for decorators. */
+
+    /* Advanced Options */
+    "skipLibCheck": true,                           /* Skip type checking of declaration files. */
+    "forceConsistentCasingInFileNames": true       /* Disallow inconsistently-cased references to the same file. */
+  },
+  "include": ["geek/*.ts"],
+  "exclude": ["node_modules"]
+}