Typescript

node_modules/connect-mongo/src/types.d.ts:113:66 - error TS2694: Namespace 'global.Express' has no exported member 'SessionData'.

113         get: (sid: string, callback: (err: any, session: Express.SessionData | null) => void) => void;                                                                     ~~~~~~~~~~~

node_modules/connect-mongo/src/types.d.ts:114:45 - error TS2694: Namespace 'global.Express' has no exported member 'SessionData'.

114         set: (sid: string, session: Express.SessionData, callback?: (err: any) => void) => void;
                                                ~~~~~~~~~~~

node_modules/connect-mongo/src/types.d.ts:118:47 - error TS2694: Namespace 'global.Express' has no exported member 'SessionData'.

118         touch: (sid: string, session: Express.SessionData, callback?: (err: any) => void) => void;

mkdir my-app

cd my-app

npm init svelte@next

npm install

npm run dev

$ npm run dev -- --open


> sveltekit-app@0.0.1 dev D:\workspace\sveltekit-app

> svelte-kit dev "--open"

D:\workspace\sveltekit-app\node_modules\@sveltejs\kit\svelte-kit.js:2

import './dist/cli.js';

	SyntaxError: Unexpected string
	at Module._compile (internal/modules/cjs/loader.js:723:23)
	at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
	at Module.load (internal/modules/cjs/loader.js:653:32)
	at tryModuleLoad (internal/modules/cjs/loader.js:593:12)
	at Function.Module._load (internal/modules/cjs/loader.js:585:3)
	at Function.Module.runMain (internal/modules/cjs/loader.js:831:12)
	at startup (internal/bootstrap/node.js:283:19)
	at bootstrapNodeJSCore (internal/bootstrap/node.js:622:3)
									   
	npm ERR! code ELIFECYCLE
	npm ERR! errno 1
	npm ERR! sveltekit-app@0.0.1 dev: `svelte-kit dev "--open"`
	npm ERR! Exit status 1
	npm ERR!
	npm ERR! Failed at the sveltekit-app@0.0.1 dev script.
	npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
   

function a(args: number ): number {
	return args;
}
console.log(a(123));

function b(args: string ): string {
	return args;
}
console.log(b("sdg"));

function c(args: any ): any {
	return args;
}
console.log(c("sdg"));

function c(args: any ): any {
    let n = args + "变成了字符串";
    //甚至更多的处理
	return n;
}
console.log(c(1));

function d<A>(args: A ): A {
    let n = args + "变成了字符串";
    //甚至更多的处理
	return n;
}
console.log(d(1));

function d<Az>(args: Az ): Az {
    let n = args + "变成了字符串";
    //甚至更多的处理
	return n;
}
console.log(d(1));

function d<T, U>(args: T,ar: U): U {
	return ar;
}
console.log(d(2, "aaaa"))

{
    "compilerOptions": {
        "module": "commonjs",//模块化规范
        "target": "es5",//生成js
        "noImplicitAny": true,//在表达式和声明上有隐含的'any'类型时报错
        "noImplicitReturns": true,//函数没有返回值提示
        "noFallthroughCasesInSwitch": true,//switch没有break提示
        "removeComments": true,//输出文件移除注释
        "noEmitOnError": true,//ts文件错误时不生成js
        "rootDir": "./",//需要编译的根目录
        "outDir": "./build",//编译文件输出目录
        "sourceMap": ture//是否生成.map文件，用于ts debug调试
    },
    "include": [
        "*/**/*.ts"
    ],
    "exclude": [
        //默认排除了node_modules
    ]    
}

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
    "version": "0.1.0",
    "command": "tsc",
    "isShellCommand": true,
    "args": ["-w", "-p", "."],
    "showOutput": "silent",
    "isWatching": true,
    "problemMatcher": "$tsc-watch"
}

{
    "compilerOptions": {
        "experimentalDecorators": true
    }
}

//test.ts
class Route {
    greeting: string;
    constructor(greet: string){
        this.greeting = greet;
    }

    @route("hello")
    default(): any {
        console.log(this.greeting);
    }
}

function route(name: string) {
    return function (target: Object, value: string, desc: PropertyDescriptor) {
        console.log('>>>>', name);
    }
} 

//test.js
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
    return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var Route = /** @class */ (function () {
    function Route(greet) {
        this.greeting = greet;
    }
    Route.prototype.default = function () {
        console.log(this.greeting);
    };
    __decorate([
        route("hello")
    ], Route.prototype, "default", null);
    return Route;
}());
function route(name) {
    return function (target, value, desc) {
        console.log('装饰器输出', name);
    };
}